Propylene oxide is a colorless ether liquid, low boiling point, flammable, and chiral. The industrial product is generally a racemic mixture of two enantiomers. Partly miscible with water, miscible with ethanol and ether. It forms a binary azeotropic mixture with pentane, pentene, cyclopentane, cyclopentene, and dichloromethane. The following is an introduction to the related uses of propylene oxide.
The following is an introduction to the purpose of the content
lThe use and application range of propylene oxide
lPropylene oxide is mainly used to produce polyether polyol (PPG)
lThe second largest use of propylene oxide is for the production of propylene glycol
lThe produced propylene glycol ether is a low-toxic organic solvent with a wide range of uses
The use and application range of propylene oxide
The KOH/4A molecular sieve solid catalyst with high activity and stability for the synthesis of dimethyl carbonate from propylene oxide, carbon dioxide, and methanol was developed for the first time. The effects of the reaction temperature and the loading of KOH, the active component of the catalyst, on the performance of the catalyst were investigated. The influence. Under optimized experimental conditions, propylene oxide can be completely converted, and the yield of dimethyl carbonate is 168%.
Propylene oxide is mainly used in the production of polyether polyol, propylene glycol, and various non-ionic surfactants. Among them, polyether polyol is an important raw material for the production of polyurethane foam, insulation materials, elastomers, adhesives, and coatings. Ionic surfactants are widely used in petroleum, chemical, pesticide, textile, daily chemical, and other industries. At the same time, propylene oxide is also an important basic chemical raw material.
Propylene oxide is mainly used to produce polyether polyol (PPG)
Polyether polyols are derived from propylene oxide and are organic materials containing two or more hydroxyl groups (OH). Some polyether varieties contain micron-sized polymer particle suspensions.
The biggest use of polyether polyol is in addition to the production of polyurethane plastics; secondly, it is used as a surfactant, such as foam stabilizer, paper industry defoamer, crude oil demulsifier, oil well acid treatment wetting agent and high-efficiency low-foaming detergent, etc.; also used as Lubricant, hydraulic fluid, heat exchange fluid, and quenching agent, latex foaming agent, various cutting and drawing agent components and special solvents, etc.
Propylene oxide in China is mainly used in the production of polyether poly (PPG). Due to the different types of starters, the polyether produced can be divided into soft foam polyether, rigid foam polyether, and elastomer polyether. Soft foam polyether, mainly used as soft polyurethane foam, used for mattresses, sofas, furniture, and car cushions, etc.; rigid foam polyether is mainly used as rigid polyurethane foam, used for heat preservation, refrigerators, etc.; elastomer polyether is mainly used As a polyurethane elastomer, used in sports tracks, coatings, adhesives, sealants, etc.
The second-largest use of propylene oxide is for the production of propylene glycol
Propylene oxide can be used to produce storage tanks, bathroom equipment, ship hulls, etc. through the production of propylene glycol, alcohol ethers, and propylene carbonate. Propylene glycol is a generic term for mono propylene glycol (MPG), propylene glycol (DPG), and tripropylene glycol (TPG).
Propylene glycol is a raw material for the manufacture of unsaturated polyester resins, epoxy resins, and polyurethane resins; it is also an intermediate for the production of surfactants such as emulsifiers and demulsifiers; because of its low toxicity, it can also be used as food pigments, fragrances, and cosmetics. Solvent; can also be used as a tobacco wetting agent, antifungal agent, and fruit ripening preservative; in the pharmaceutical industry, propylene glycol is widely used as an auxiliary and moisturizer for liquid or ointment drugs; in the food industry, Propylene glycol fatty acid esters can be used as food emulsifiers, propylene glycol is also an excellent solvent for flavoring and pigments; in paints, pigments, and daily chemistry, propylene glycol is mainly used to produce plasticizers, solvents and thickeners (such as toothpaste) Wait.
The produced propylene glycol ether is a low-toxic organic solvent with a wide range of uses
This low-toxic organic solvent is widely used in the coating industry, brake fluids, antifreeze, jet engine fuel additives, floor polishes, printing inks, electronic chemicals, cleaning agents, mineral processing agents, leather processing, photosensitive liquids for PS plates, short Effective plasticizers, dyes, pesticides, and other fields. At the same time, glycol ethers are also widely used in the synthesis of alcohol ether acetates.
In addition, propylene oxide is also used in a small amount in coatings, non-ionic surfactants, oil field demulsifiers, flame retardants, pesticide emulsifiers, and wetting agents. Propylene oxide can also be used directly as a packaged fumigant for dried fruits and bulk fumigants for foods such as cocoa, seasonings, screw meat, starch, and gums.
Propylene oxide derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine, and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products.