Dipentaerythritol
| HS Code | 805863 |
| Chemical Formula | C10H22O7 |
| Molar Mass | 254.28 g/mol |
| Appearance | white crystalline powder |
| Odor | odorless |
| Solubility In Water | slightly soluble |
| Solubility In Organic Solvents | soluble in some organic solvents like ethanol |
| Melting Point | 180 - 186 °C |
| Boiling Point | decomposes before boiling |
| Density | 1.35 - 1.40 g/cm³ |
| Stability | stable under normal conditions |
| Hazard | may cause eye and skin irritation |
As an accredited Dipentaerythritol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dipentaerythritol packaged in 25 - kg bags for convenient handling and storage. |
| Storage | Dipentaerythritol should be stored in a cool, dry, well - ventilated area. Keep it away from sources of heat, ignition, and incompatible substances like strong oxidizing agents. Store in tightly sealed containers to prevent moisture absorption, which could affect its quality. Avoid storing in areas prone to flooding or high humidity. |
| Shipping | Dipentaerythritol is shipped in sealed, corrosion - resistant containers to prevent contact with moisture and contaminants. It's transported under ambient conditions, following strict chemical shipping regulations to ensure safety. |
Competitive Dipentaerythritol prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Historical Development
At the beginning of the 20th century, the chemical industry was popular. Tetrahydroxymethane, known as Dipentaerythritol in the West, was first seen in European laboratories. Its method is made by combining formaldehyde and aldosterone through a multi-stage condensation reaction. During World War II, due to the sudden increase in demand for explosives and coatings, the production technology became more and more refined. In the peacetime, scientists studied its characteristics and explored and improved the process in many ways, and gradually used it to produce high-grade synthetic lubricants, resins and flame retardants. After China's reform and opening up, it was introduced. After decades of research, it overcame the difficulties of purity and yield, and has now become its own system. Global trade is becoming more frequent, and the application of Dipentaerythritol is wider. It has promoted related industries and made outstanding contributions to the field of modern chemicals and materials.
Product Overview
Dipentaerythritol, chemical, white crystalline, stable, insoluble in water, soluble in alcohol ether. It is obtained from the reaction of aldehyde and polyol, and is widely used in coatings, synthetic resins, lubricating oils and other industries. Its molecular structure is multi-hydroxyl, with high reactivity, giving the product excellent weather resistance, heat resistance and chemical resistance. It is selected as a raw material for plasticizing, flame retardant and polymer materials. In application, it can improve the luster of the product, enhance the mechanical strength and prolong the service life. Its purity is very high, and it can be adjusted according to the needs of various processes. It is very suitable for precision manufacturing. It is widely sold at home and abroad, and has won many favor. It is an essential product for the development of modern industry.
Physical & Chemical Properties
Dipentaerythritol, its properties are white crystalline powder, odorless and slightly sweet. Its melting point is about 213 to 218 degrees Celsius, it is insoluble in cold water, slightly soluble in hot water and ethanol, insoluble in ether and benzene. Molecular formula C10H22O7, molecular weight is 254.28. It has relatively stable chemical properties. It can be slowly decomposed when exposed to strong acids or bases. It is not easy to volatilize at room temperature and has no obvious hygroscopicity. It has the characteristics of polyhydroxyl groups and can react with a variety of organic acids or isocyanates to form polyol esters or polyurethane. It has no significant reaction to air and light. When heated to high temperature, it decomposes slowly. When burned, carbon dioxide and water are generated. If it encounters strong oxidants, it can also react. Dipentaerythritol is widely used in the chemical industry because of its molecular symmetry and stable physical properties.
Technical Specifications & Labeling
Dipentaerythritol, white crystalline powder, pure in properties, slightly soluble in water, soluble in ethanol. Molecular formula C10H22O7, molecular weight 254.28. Melting point is about 220 to 240 degrees Celsius, odorless and light in taste. Moisture content does not exceed 0.5%, ash content does not exceed 0.05%. Hydroxyl value should be between 1400 and 1450mgKOH/g. The content of crude products is more than 98%, and that of pure products is more than 99%. Particle size can be divided according to needs, and the remaining 200 mesh sieve is less than 2%. Packaging is commonly lined with plastic bags, external woven bags, the net weight of each bag is 25 kg or customized according to customer requirements. Storage and transportation are moisture-proof and heat-proof, and do not coexist with toxic substances. Indicate the product name, batch number, net weight, and production site. It is widely used in coatings, adhesives, flame retardants and plastic additives.
Preparation Method
Take formaldehyde and aldehyde propane trienol as raw materials, reconcile them in the reactor, use dilute alkali as catalyst, moderate temperature, and gradually heat to control the reaction rate. The initial reaction generates pentaerythritol and its monoacetal, followed by the aldehyde reaction, continue to add materials to promote the condensation of intermolecular polyhydroxyl groups, and finally obtain dipentaerythritol. During this period, the amount of alkali needs to be strictly controlled to prevent the proliferation of by-products. After neutralization, crystallization, filtration, recrystallization and other processes, a pure finished product is obtained. The basic catalytic mechanism is that hydroxyl ions promote nucleophilic addition, activate aldehyde groups, and the reaction path tends to polyol formation. In summary, the purity of raw materials, alkali concentration and temperature adjustment are the key points of the process, and the reaction is step-by-step and fine, so as to obtain high yield and good quality pentaery
Chemical Reactions & Modifications
Dipentaerythritol is a polyhydroxy alcohol, with stable properties and a polymer skeleton. Its molecules contain five-membered hydroxyl groups, which are easy to react with a variety of functional groups. Esterified with fatty acids, polymer polyester can be obtained, giving it good flexibility and weather resistance. When encountering isocyanate, polyurethane can be formed, which is tough and easy to plastic. In etherification and etherification condensation, it can copolymerize with epoxy, aldehyde, isocyanate, etc., with variable structure and excellent performance. Or phosphorylated, it has flame retardant effect. It can also be modified with inorganic fillers to enhance its dispersion and bonding. Therefore, Dipentaerythritol has a wide range of chemical reactions and various modification routes. It can take its hydroxyl activity and can be diversified into processes. It is widely used in coatings, adhesives, plastics and high-performance materials with unique properties.
Synonyms & Product Names
Dipentaerythritol, chemical names, and so on, common synonyms are dihydroxymethyltrihydroxymethylpropane, dipentaerythritol, also known as dipentaerythritol. Its English aliases are many, such as Di-Pentaerythritol, Di-PE, Di-PEP, or Dipenta, Dipentapentaerythritol. In market circulation, various manufacturers have different names due to different places, or marked with Di-Penta 90, Di-Penta 96, Di-Penta Technical, etc., indicating the difference in purity, or labeled with "advanced polymerization agent" "plasticizer" and other trade names, which circulate with the market. Its properties are white crystals, which are widely used in the manufacture of coatings, inks, and synthetic fats. It is a commonly used heavy agent in the chemical industry. The coexistence of various synonyms and commodity names does not affect their wide circulation and wide application.
Safety & Operational Standards
Dipentaerythritol is also a chemical product. Its properties are white crystalline, slightly soluble in water, easy to decompose in case of high temperature, and change in case of open flame and organic oxidants. Those who use this product should be cautious first. The utensils should be clean and dedicated. Store in a ventilated and cool place, away from fire sources and flammable substances, to prevent disasters. For unsealing, you must wear gloves, goggles, and masks to avoid skin splashing and prevent inhalation of its dust. The operator's clothes should be tightly closed, and it is not suitable to expose the skin. It is advisable to cleanse the body after operation. If the dust escapes, the air should be smooth to prevent accumulation and explosion, and there is no strong wind to blow up, so that the dust does not fly. Its waste residue should not be dumped at will, and it should be disposed of according to regulations. Do not dispose of it in ditches, rivers, wells and
In case of spilling, it is advisable to collect it immediately, do not rinse with water, first gather it with a clean tool, and seal it properly. If it misses the skin, rinse it with water urgently, and if it enters the eye, rinse it with a large amount of running water and seek medical attention. All utensils used must be cleaned after use, and must not be left behind to prevent cross-contamination. When blending, add it slowly, do not pour it suddenly, and beware of intense reactions. Between storage, do not store it with strong oxidants, strong acids, and strong alkalis, and keep a ledger, and the stock is clear for spot inspection.
After a long time of work, regular physical examination is required, and self-police health is required. Environmental monitoring should not be slack. If there is abnormal odor or or dust accumulation, it will be investigated and dealt with immediately. Emergency, equipped with escape routes and fire extinguishing equipment to protect their own and peers. In short, safety first, follow the rules, to ensure the safety of people, in all things unswervingly.
In case of spilling, it is advisable to collect it immediately, do not rinse with water, first gather it with a clean tool, and seal it properly. If it misses the skin, rinse it with water urgently, and if it enters the eye, rinse it with a large amount of running water and seek medical attention. All utensils used must be cleaned after use, and must not be left behind to prevent cross-contamination. When blending, add it slowly, do not pour it suddenly, and beware of intense reactions. Between storage, do not store it with strong oxidants, strong acids, and strong alkalis, and keep a ledger, and the stock is clear for spot inspection.
After a long time of work, regular physical examination is required, and self-police health is required. Environmental monitoring should not be slack. If there is abnormal odor or or dust accumulation, it will be investigated and dealt with immediately. Emergency, equipped with escape routes and fire extinguishing equipment to protect their own and peers. In short, safety first, follow the rules, to ensure the safety of people, in all things unswervingly.
Application Area
Dipentaerythritol is the essence of chemistry, and its mild and stable properties are very common. Used in high-grade lubricating oils, it can enhance its anti-oxidation and anti-wear properties, and it will not fade for a long time; when combined with synthetic resins, it can benefit its luster and toughness. It is widely used in coatings and paints, and can resist high temperature, corrosion, and improve its lifespan. It can also be used as a base material for flame retardants, fire appliances, and cable coatings, which are often seen. The plastics industry, because of its molecular structure, is mostly used for the modification of polymer materials to improve their strength and ductility. Medicinal excipients are also used because of their purity. In this regard, Dipentaerythritol is widely used and is indispensable in the fields of modern technology, building materials, and cutting-edge technology, so it is cherished by the chemical industry.
Research & Development
Diamyl alcohol is white crystalline, dense and solid, and is widely used in many industries such as synthetic resins, plasticizers, and lubricants. Since the rise of chemical industry, the sages have studied its preparation, but the process has not been perfected. Modern scholars have made great efforts to improve the reaction raw materials or optimize the catalytic route, trying to reduce energy consumption and reduce by-products. There are many experimental multi-step reduction methods and new enzyme catalysis processes, which have achieved considerable results. It also leads to intelligent automatic control, precision regulation of temperature and pressure speed, and improvement of purity, which is more efficient than in the past. Today, it is turning to the road of green environmental protection, advocating circular economy, avoiding pollution, and making its production in line with sustainable development. Looking to the future, if we can integrate cutting-edge technology and innovative processes, we will be able to expand its application boundaries, benefit society, and contribute to the prosperity of the chemical industry.
Toxicity Research
Dipentaerythritol, a white crystalline powder, is widely used in synthetic resins, coatings and plasticizers. To investigate its toxicity, today's rodent experiments have been conducted, and the dosage has been measured to 5,000 milligrams per kilogram, and there is no significant abnormality in animals. Long-term exposure to its dust, although it occasionally causes slight irritation of the respiratory tract, no organ damage has been seen. Skin contact, there is also a rare irritation response. After many acute and chronic experiments, no evidence of teratogenic, carcinogenic or embryonic toxicity has been found. However, in factory operations, it is still advisable to wear protective gear to prevent dust intrusion. Modern books show that it has high biodegradability, low accumulation, and minimal environmental risk. However, if ingested in large doses, there is a risk of indigestion, vomiting and diarrhea, and it is necessary to be careful to prevent accidental ingestion. In summary, Dipentaerythritol has minimal toxicity, and it can still be protected.
Future Prospects
Dipentaerythritol is a heavy material in the chemical industry. It has stable properties and a wide range of applications. It can not only get involved in coatings, lubrication, but also be committed to flame retardant and plastics. After years of precipitation, the process has become more and more perfect, and the quality has become more and more pure. Looking at its future, with the innovation of science and technology and the promotion of green environmental protection, the benefits of Dipentaerythritol will see great development. Wind energy, light energy and other new energy industries are booming, and it is the substrate of polymer materials, which will be more important. Driven by the global low-carbon trend, green synthesis has attracted more and more attention. Dipentaerythritol may participate in the development of bio-based derivatives, opening up a new situation. And with frequent international trade, rising demand, and equal emphasis on quality and supply chain construction, it will be able to compete for the best in the future. Following this trend, the road to innovation will be broader, and the future will be promising.
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What are the main uses of Dipentaerythritol?
Dimethylolpropane, known as Dipentaerythritol, is an important polyhydroxyl alcohol in organic chemistry. Its white crystalline quality, soluble in water and slightly soluble in alcohol, and its properties are stable. Its main functions are wide, covering many fields of modern industry.
First of all, dimethylolpropane is an important raw material for the synthesis of advanced lubricating oils and greases. Its polyhydroxyl structure forms a tough network between molecules, which is stabilized by water decomposition and oxidation. Therefore, the synthesized lubricating oil has moderate viscosity, high temperature resistance and chemical stability, especially suitable for modern automobiles, aircraft and precision facilities. And its generated grease has good emulsification and dispersion, and is suitable for lubrication of many devices in the machinery industry.
Secondly, dimethylolpropane is used in the manufacture of epoxy resins and synthetic resins. With it as the main monomer, it participates in polymerization, which can significantly improve the molecular crosslinking degree and structural stability of the resin. The finished epoxy resin is an important material in the fields of electrical insulation, adhesives, and architectural coatings because of its high mechanical strength, good insulation and chemical resistance. In addition, it can also synthesize special alkyd resins to make the coatings more firm and shiny.
It is also an important modifier for acrylic resins and polyurethane resins. Adding Dipentaerythritol can improve the thermal stability and water resistance of the finished product, making it widely used in high-performance coatings, sealants, and composites. It is also commonly used in the synthesis of flame retardants and surfactants. Due to the characteristics of polyhydroxyl groups, the flame retardant effect is improved, making it widely used in cables, plastics and building materials, which is of great benefit.
In the pharmaceutical and cosmetic industries, dimethylolpropane is used as some pharmaceutical intermediates and raw materials. It can also be used as an emulsifier and dispersant to improve the quality and stability of products. It can also participate in the production of fine chemical raw materials such as explosives and plastics.
Looking at its use, Dipentaerythritol has become an indispensable heavy material for the modern chemical industry due to its unique structure and excellent performance. It enjoys a wide reputation in the fields of lubrication, plastics, coatings, flame retardant and daily necessities.
First of all, dimethylolpropane is an important raw material for the synthesis of advanced lubricating oils and greases. Its polyhydroxyl structure forms a tough network between molecules, which is stabilized by water decomposition and oxidation. Therefore, the synthesized lubricating oil has moderate viscosity, high temperature resistance and chemical stability, especially suitable for modern automobiles, aircraft and precision facilities. And its generated grease has good emulsification and dispersion, and is suitable for lubrication of many devices in the machinery industry.
Secondly, dimethylolpropane is used in the manufacture of epoxy resins and synthetic resins. With it as the main monomer, it participates in polymerization, which can significantly improve the molecular crosslinking degree and structural stability of the resin. The finished epoxy resin is an important material in the fields of electrical insulation, adhesives, and architectural coatings because of its high mechanical strength, good insulation and chemical resistance. In addition, it can also synthesize special alkyd resins to make the coatings more firm and shiny.
It is also an important modifier for acrylic resins and polyurethane resins. Adding Dipentaerythritol can improve the thermal stability and water resistance of the finished product, making it widely used in high-performance coatings, sealants, and composites. It is also commonly used in the synthesis of flame retardants and surfactants. Due to the characteristics of polyhydroxyl groups, the flame retardant effect is improved, making it widely used in cables, plastics and building materials, which is of great benefit.
In the pharmaceutical and cosmetic industries, dimethylolpropane is used as some pharmaceutical intermediates and raw materials. It can also be used as an emulsifier and dispersant to improve the quality and stability of products. It can also participate in the production of fine chemical raw materials such as explosives and plastics.
Looking at its use, Dipentaerythritol has become an indispensable heavy material for the modern chemical industry due to its unique structure and excellent performance. It enjoys a wide reputation in the fields of lubrication, plastics, coatings, flame retardant and daily necessities.
What are the chemical properties of Dipentaerythritol?
Dipentaerythritol, chemical name Dipentaerythritol, is also a polyhydroxy alcohol organic substance. Its properties are white powder, slightly sweet, soluble in water and ethanol, insoluble in ethers and benzene. Its molecular formula is C10H22O7, which contains hexahydroxy groups in the molecule. Its chemical properties are described as follows:
First, because of polyhydroxy groups, in acidic media, it can condensate with various organic acids to form polyol esters. Heating with fatty acids produces dipentaerythritol esters, which are high-performance lubricating oil substrates with high temperature resistance, chemical stability, and excellent performance. Second, hexahydroxy groups can participate in etherification reactions. After reacting with epoxides, it is easy to form polyethers, which are widely used in the resin and coating industries. Third, the compound is warm and stable, and can be decomposed only when heated. It is difficult to be eroded by general oxidizing agents and reducing agents. Left in the air for a long time, it is difficult to spontaneously ignite and self-destruct, and there is no obvious harm. In case of strong oxidizing agent and strong acid, it begins to react, and can generate derivatives such as aldodes, ketones, and acids.
With its polyhydroxyl properties, it can react with isocyanates to form polyurethane materials. If it interacts with isocyanates, it is used in industries such as foaming agents and sealants. It can also react with halogen phosphate to synthesize flame retardants. It can be seen that dipentaerythritol is widely used, and its chemical properties are mostly polyhydroxyl reactions.
Its solubility is special, it is easily soluble in hot water at room temperature, and soluble in cold water, but the speed is slightly slower, and the solubility in alcohol is good. When heated to high temperature, it melts first and then decomposes. When the temperature is extremely high, decomposition occurs, and irritating gases are released. It is extremely stable to light and heat, and is convenient for storage and transportation. Compared with ordinary pentaerythritol, its number of hydroxyl groups is more, and its reactivity is higher, making it suitable for the preparation of polymer.
In summary, dipentaerythritol has the activity of polyhydroxyl groups, and can be esterified, etherified, and polycondensed, adapting to a variety of chemical reactions. Its warm and stable properties are mostly used as high-performance materials, additives, and additives, which are relied on by modern chemical
First, because of polyhydroxy groups, in acidic media, it can condensate with various organic acids to form polyol esters. Heating with fatty acids produces dipentaerythritol esters, which are high-performance lubricating oil substrates with high temperature resistance, chemical stability, and excellent performance. Second, hexahydroxy groups can participate in etherification reactions. After reacting with epoxides, it is easy to form polyethers, which are widely used in the resin and coating industries. Third, the compound is warm and stable, and can be decomposed only when heated. It is difficult to be eroded by general oxidizing agents and reducing agents. Left in the air for a long time, it is difficult to spontaneously ignite and self-destruct, and there is no obvious harm. In case of strong oxidizing agent and strong acid, it begins to react, and can generate derivatives such as aldodes, ketones, and acids.
With its polyhydroxyl properties, it can react with isocyanates to form polyurethane materials. If it interacts with isocyanates, it is used in industries such as foaming agents and sealants. It can also react with halogen phosphate to synthesize flame retardants. It can be seen that dipentaerythritol is widely used, and its chemical properties are mostly polyhydroxyl reactions.
Its solubility is special, it is easily soluble in hot water at room temperature, and soluble in cold water, but the speed is slightly slower, and the solubility in alcohol is good. When heated to high temperature, it melts first and then decomposes. When the temperature is extremely high, decomposition occurs, and irritating gases are released. It is extremely stable to light and heat, and is convenient for storage and transportation. Compared with ordinary pentaerythritol, its number of hydroxyl groups is more, and its reactivity is higher, making it suitable for the preparation of polymer.
In summary, dipentaerythritol has the activity of polyhydroxyl groups, and can be esterified, etherified, and polycondensed, adapting to a variety of chemical reactions. Its warm and stable properties are mostly used as high-performance materials, additives, and additives, which are relied on by modern chemical
What are the storage conditions for Dipentaerythritol?
When storing Dipentaerythritol (bispentaerythritol), it is advisable to follow a careful method to ensure that its properties remain unchanged and avoid its quality damage. It is a white crystalline or colorless powder with stable properties, so storage must be cautious and not difficult. Its nature is slightly hygroscopic, and it is easy to agglomerate in case of moisture, and it is also afraid of high temperature and strong light. The storage place should be a ventilated and dry place, with high terrain and no trouble of water seepage. It should not be in contact with water and moisture around. Its container should be mainly sealed. Iron or plastic drums lined with plastic can be used to prevent gas and moisture from invading, so as to avoid moisture absorption and agglomeration of the product and affect the use.
During storage, it should not be mixed with strong oxidants, strong acids, strong alkalis and other substances. For fear that the reaction will change and cause a safety accident. The temperature of the warehouse should be mainly normal temperature, not near the heat source, avoid direct sunlight, and prevent its properties from changing. If the quantity is large, it should be placed in batches, and do not stack too high to prevent the package from being damaged due to extrusion. When handling, when handling with care, avoid violent throwing, to prevent the container from breaking, the product is exposed, and it becomes damp.
The storage place must be clearly marked, indicating the product name and safety matters, and frequent inspections should be carried out to ensure the stability of storage. If the package is found to be damaged, it should be repaired immediately, or the package should be replaced to prevent contamination. The warehouse must be equipped with a desiccant to absorb moisture. If it encounters heavy moisture, replace the moisture absorber in time to ensure that the internal environment is dry.
Before use, it is necessary to check its properties as before, and it can be used without significant discoloration, agglomeration, odor, etc. If there is any abnormality, it should not be reused, and it can be dealt with in time. To sum up, the way to store Dipentaerythritol is to care about the dry environment, moderate temperature, sealed storage, away from high temperature, strong light and chemicals, and be diligent in inspection and prevention, so that its quality can be preserved for a long time and not easily changed.
During storage, it should not be mixed with strong oxidants, strong acids, strong alkalis and other substances. For fear that the reaction will change and cause a safety accident. The temperature of the warehouse should be mainly normal temperature, not near the heat source, avoid direct sunlight, and prevent its properties from changing. If the quantity is large, it should be placed in batches, and do not stack too high to prevent the package from being damaged due to extrusion. When handling, when handling with care, avoid violent throwing, to prevent the container from breaking, the product is exposed, and it becomes damp.
The storage place must be clearly marked, indicating the product name and safety matters, and frequent inspections should be carried out to ensure the stability of storage. If the package is found to be damaged, it should be repaired immediately, or the package should be replaced to prevent contamination. The warehouse must be equipped with a desiccant to absorb moisture. If it encounters heavy moisture, replace the moisture absorber in time to ensure that the internal environment is dry.
Before use, it is necessary to check its properties as before, and it can be used without significant discoloration, agglomeration, odor, etc. If there is any abnormality, it should not be reused, and it can be dealt with in time. To sum up, the way to store Dipentaerythritol is to care about the dry environment, moderate temperature, sealed storage, away from high temperature, strong light and chemicals, and be diligent in inspection and prevention, so that its quality can be preserved for a long time and not easily changed.
Is Dipentaerythritol Harmful to the Environment?
Dihydroxypentaerythritol is one of the chemical substances, the western name of Dipentaerythritol, which is widely used in paints, plastics, lubricants and many other fields. Its white solid, no obvious odor, soluble in water, and stable chemical properties. Today's discussion of its harm to the environment, based on the classic and modern scientific literature, can be analyzed in detail.
First, the decomposition of dihydroxypentaerythritol in the environment is relatively slow. If it is abandoned in soil and water, it depends on microorganisms to decompose for a long time, but no toxic by-products are produced at all. If some organic matter can quickly release toxins, it will cause environmental harm. Its laziness makes it difficult to migrate and penetrate deep water veins.
Second, bioaccumulation is minimal. It is well known that harmful chemicals are easily absorbed by animals and plants, accumulated in the body, and accumulated to harmful doses. However, according to scientific experiments, after dihydroxypentaerythritol enters the water, fish and shrimp do not absorb much, nor do they die due to ingestion, nor do they see toxic reactions. Animal experiments also show that this substance is low-toxic and non-fatal. Its circulation in the ecosystem does not pose a serious threat.
Third, it is not easy to volatilize in the atmosphere, and no air pollution due to evaporation is seen. Its morphology is stable, it is not a persistent organic pollutant, and it does not generate harmful factors due to solar hydrolysis. In case of high temperature combustion, only non-harmful substances such as carbon dioxide and water are analyzed, and the impact on the atmosphere is minimal.
However, if it is accidentally leaked during large-scale production, transportation or storage, or causes short-term pollution. And if it is mixed with other harmful substances, it needs to be properly disposed of. Where industrial waste should be in accordance with environmental protection norms, do not discard it lightly in the environment, in order to prevent small hidden and serious disasters. Although chemicals are not harmful, they are not careless and eventually risky.
In summary, dihydroxypentaerythritol itself is stable in nature, has no obvious ecological toxicity, and has very low accumulativeness. It is not harmful to the environment under proper use. However, it must be careful to dispose of it when it is discarded, and it should not be left unchecked. Covering the good and evil of chemicals is also related to human governance.
First, the decomposition of dihydroxypentaerythritol in the environment is relatively slow. If it is abandoned in soil and water, it depends on microorganisms to decompose for a long time, but no toxic by-products are produced at all. If some organic matter can quickly release toxins, it will cause environmental harm. Its laziness makes it difficult to migrate and penetrate deep water veins.
Second, bioaccumulation is minimal. It is well known that harmful chemicals are easily absorbed by animals and plants, accumulated in the body, and accumulated to harmful doses. However, according to scientific experiments, after dihydroxypentaerythritol enters the water, fish and shrimp do not absorb much, nor do they die due to ingestion, nor do they see toxic reactions. Animal experiments also show that this substance is low-toxic and non-fatal. Its circulation in the ecosystem does not pose a serious threat.
Third, it is not easy to volatilize in the atmosphere, and no air pollution due to evaporation is seen. Its morphology is stable, it is not a persistent organic pollutant, and it does not generate harmful factors due to solar hydrolysis. In case of high temperature combustion, only non-harmful substances such as carbon dioxide and water are analyzed, and the impact on the atmosphere is minimal.
However, if it is accidentally leaked during large-scale production, transportation or storage, or causes short-term pollution. And if it is mixed with other harmful substances, it needs to be properly disposed of. Where industrial waste should be in accordance with environmental protection norms, do not discard it lightly in the environment, in order to prevent small hidden and serious disasters. Although chemicals are not harmful, they are not careless and eventually risky.
In summary, dihydroxypentaerythritol itself is stable in nature, has no obvious ecological toxicity, and has very low accumulativeness. It is not harmful to the environment under proper use. However, it must be careful to dispose of it when it is discarded, and it should not be left unchecked. Covering the good and evil of chemicals is also related to human governance.
What is the production process of Dipentaerythritol?
Dimethylolpropane diether, known as dipentaerythritol, is an important intermediate in modern organic chemical industry. There are many methods for its preparation, but the aldol condensation method is the most common. The cover is formed by the reaction of formaldehyde and aldol through the action of a catalyst. The process is roughly as follows:
First take formaldehyde and aldol, and slowly mix them in a certain proportion. At this time, the temperature is constant dimension 40 to 60 degrees Celsius, stir them to distribute evenly with each other. With bases as catalysts, such as sodium hydroxide and potassium hydroxide, formaldehyde and aldol generate hydroxymethylpropane and its derivatives in an alkaline environment, and gradually polymerize. In this step, the temperature and pH must be strictly controlled. If the cover temperature is too high, side reactions will occur, and impurities will be easily mixed in.
After the initial reaction is completed, a rough and turbid reaction solution is obtained. At this time, the primary product is separated by heating. Then, it is moved into the secondary reactor, and the raw materials such as formaldehyde and aldehyde alcohol are added to repeat the previous reaction process. The polymerization increases to generate the content gain of dipentaerythritol, and the by-products are brushed off. Then, it is transferred to filtration to remove the residue. Decolorization with activated carbon is beneficial to the clear and bright product.
The obtained solution is distilled in vacuum and gradually concentrated. Temperature control needs to be carefully controlled to avoid decomposition losses. When the solution is in the form of a thick paste, the solid is precipitated by condensation to obtain the crude product of dipentaerythritol. It is purified by recrystallization method to reduce impurities to a very low level. The finished product is a white crystalline powder, which is a high-purity dipentaerythritol.
Overall, it is the essence of the material ratio, the control of the reaction conditions, and the wonderful separation and purification. And formaldehyde and aldehyde alcohol are the main materials, supplemented by alkali, taking into account temperature and pH, and progressing layer by layer, to obtain pure and good products used in industry. Today, this production method is used in the world, and the process is perfect. It is one of the great treasures of ancient and modern chemical methods.
First take formaldehyde and aldol, and slowly mix them in a certain proportion. At this time, the temperature is constant dimension 40 to 60 degrees Celsius, stir them to distribute evenly with each other. With bases as catalysts, such as sodium hydroxide and potassium hydroxide, formaldehyde and aldol generate hydroxymethylpropane and its derivatives in an alkaline environment, and gradually polymerize. In this step, the temperature and pH must be strictly controlled. If the cover temperature is too high, side reactions will occur, and impurities will be easily mixed in.
After the initial reaction is completed, a rough and turbid reaction solution is obtained. At this time, the primary product is separated by heating. Then, it is moved into the secondary reactor, and the raw materials such as formaldehyde and aldehyde alcohol are added to repeat the previous reaction process. The polymerization increases to generate the content gain of dipentaerythritol, and the by-products are brushed off. Then, it is transferred to filtration to remove the residue. Decolorization with activated carbon is beneficial to the clear and bright product.
The obtained solution is distilled in vacuum and gradually concentrated. Temperature control needs to be carefully controlled to avoid decomposition losses. When the solution is in the form of a thick paste, the solid is precipitated by condensation to obtain the crude product of dipentaerythritol. It is purified by recrystallization method to reduce impurities to a very low level. The finished product is a white crystalline powder, which is a high-purity dipentaerythritol.
Overall, it is the essence of the material ratio, the control of the reaction conditions, and the wonderful separation and purification. And formaldehyde and aldehyde alcohol are the main materials, supplemented by alkali, taking into account temperature and pH, and progressing layer by layer, to obtain pure and good products used in industry. Today, this production method is used in the world, and the process is perfect. It is one of the great treasures of ancient and modern chemical methods.
