Ethylene glycol   CAS 107-21-1

Ethylene glycol, also known as glycol, is the simplest aliphatic diol. It has the chemical properties of alcohols, such as the ability to generate ethers and esters, to be oxidized to generate aldehydes or acids, and to condense to generate ethers. It can also be substituted by halogens. When reacting with acyl chlorides or acid anhydrides, diesters are generally formed. When heated in the presence of a catalyst (manganese dioxide, aluminum oxide, zinc oxide or sulfuric acid), it can be dehydrated intramolecularly or intermolecularly to generate cyclic ethylene glycol acetal, which reacts with nitric acid to generate ethylene glycol dinitrate (an explosive). Ethylene glycol is a raw material for the production of polyester resins, alkyd resins, and polyester fibers. It is also used as an automotive antifreeze and aircraft engine refrigerant.

Appearance: Colorless, transparent, viscous liquid

Uses Ethylene glycol is mainly used as a raw material for polyester fibers, and is also used in other polyester resins, unsaturated polyester resins and 1730 polyester paints. Various types of surfactants can be derived from ethylene glycol and polyethylene glycol. Its dinitro compound dinitroethylene glycol is an explosive. Ethylene glycol can lower the freezing point of aqueous solutions, so it is often used as an antifreeze agent.

Production method

1. Ethylene oxide direct hydration method

2. Ethylene oxide sulfuric acid catalytic hydration method

3. Ethylene direct hydration method

4. Ethylene dichloride stirring method.

5. Formaldehyde method

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