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Use Of Ethylene Oxide

- Feb 08, 2018 -

1, ethylene oxide is a toxic carcinogen, formerly used to make bactericides. Ethylene oxide is flammable and explosive, not easy to transport long distance, so it has a strong regional character. It is widely used in washing, pharmaceutical, printing and dyeing industries. In chemical industry, it can be used as the starting agent of detergent.

2, ethylene oxide has bactericidal effect, no corrosion to metals, no residual odor, it can kill bacteria (and its spores), mould and fungi, so it can be used to sterilize some gas germicides which can not tolerate high temperature disinfection substances and materials. Lloyd Hall, an American chemist, obtained a patent for the preservation of spices by the epoxy ethane disinfection method in 1938, which is still used today. Ethylene oxide is also widely used in disinfection of medical supplies such as bandages, sutures and surgical instruments.

3, it is mainly used for making other kinds of solvents, such as fibrinolytic agent, diluent, nonionic surfactant, synthetic detergent, antifreeze, disinfectant, toughening agent and plasticizer. Water soluble resin (about 75% of ethylene oxide content) can be synthesized from hydroxyethyl cellulose. It can also be used as fumigant, coating thickener, emulsifier, adhesive and paper sizing agent. 

Usually, the mixture of ethylene oxide carbon dioxide (90:10 to two) or ethylene oxide, two chlorine, and fluoromethane is used for disinfection of hospitals and precision instruments. The fumigant used for ethylene oxide is commonly used in the preservation of food and food. For example, dry egg powder storage is often due to bacteria and decomposition, fumigation with ethylene oxide, which can prevent the deterioration of the chemical composition and egg powder, including amino acids are not affected.

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4, ethylene oxide is easy to react with acid, so it can be added as an antacid to some substances, thereby reducing the acidity of these substances or using it for a long time without producing acidity. For example, when producing chlorinated butyl rubber, the solution of copolymer of isobutene and isoprene can be completely washed without alkali and washed by adding ethylene oxide before chlorination.

Because ethylene oxide is flammable and has a wide range of explosive concentration in the air, it is sometimes used as a fuel component for fuel gasification detonating.

5, when ethylene oxide is decomposed automatically, great energy can be generated, and it can be used as a power for rocket and jet propulsion. Generally, a mixture of nitro methane and ethylene oxide is used (60:40-95:5). This kind of mixed fuel has good combustion performance, low solidification point and stable properties, which is not easy to detonate. In general, ethylene oxide has less consumption than the above direct uses. Ethylene oxide is the most important product of ethylene industry, after polyethylene, which is the second most important product. Its importance is mainly a series of products made of its raw materials. The range of downstream products derived from ethylene oxide is much more than all kinds of ethylene derivatives. The toxicity of ethylene oxide is 27 times that of ethylene glycol, which is similar to the toxicity of ammonia. The formation of formaldehyde, ethylene glycol and oxalic acid in vivo, anesthetic effects on the central nervous system play a stimulating effect on the mucous membrane, are toxic to cells.

6, most of the ethylene oxide is used to make other chemicals, mainly ethylene glycol. The main purpose of ethylene glycol is to produce polyester, and also used as a vehicle coolant and antifreeze. Secondly, it is used for the production of ethoxy compounds, ethanolamine, ethylene glycol two, ether, ethylamine, two glycols, three glycols, polyglycol, hydroxyethyl cellulose, choline chloride, ethylene two aldehyde, ethylene carbonate and other downstream products.

7, ethylene oxide is mainly used to make ethylene glycol (polyester fiber raw material), synthetic detergent, non-ionic surfactant, antifreeze, emulsifier and ethylene glycol products. It is also used to produce plasticizers, lubricants, rubber and plastics. Widely used in the fields of medicine, pesticide, dyeing, electronics, textile, papermaking, automobile, oil exploration and refining, etc..

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