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Ethylene glycol (Ethylene glycol)

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Ethylene glycol

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1,2-dihydroxy ethane
1,2-Ethanediol
1,2-Dihydroxyethane
Ethane-1,2-diol
2-hydroxy ethanol

+Expand -Stow

107-21-1

C2H6O2

62.068

2905310000

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Nature Description

Colorless clear viscous liquid. Freezing point-11.5 ℃, boiling point 198 ℃,140 ℃(12.93kPa),100 ℃(1.33kPa),70 ℃(0.4kPa),20 ℃(8.0Pa), relative density 1.1274(0/4 ℃),1.1204(10/4 ℃),1.1088(20/4 ℃),1.1065(30/4 ℃), refractive index 1.4318, density (vacuum, 20℃)1.11336g/ml. Flash point 116℃, viscosity (20℃)21mPa · s, specific heat capacity (20℃)2.35J/(g · ℃) molar generation heat-452.3kJ/mol, enthalpy change of solution 187.025J/g, steam heating 799.14J/g,

1.113

196-198oC

-13oC

-11.5℃

116oC

MISCIBLE

1.43-1.433

MISCIBLE

Product Applications

It is mainly used to produce synthetic resin, surfactant and explosive, and also used as antifreeze compounds; It is used as analytical reagent, chromatographic analysis reagent and capacitor medium; It is mainly used to produce polyester resin, alkyd resin, plasticizer, antifreeze compounds, it is also used in cosmetics and explosives; Ethylene glycol is the bactericide pentacyclazole and..

Production method

1. Ethylene oxide direct hydration is currently the only way to produce ethylene glycol on an industrial scale. Ethylene oxide and water are directly hydrated in liquid phase in a tubular reactor under the conditions of pressure (2.23MPa) and 190-200℃ to produce ethylene glycol. At the same time, ethylene glycol, triethylene glycol and polyethylene glycol are produced by-product. The ethylene glycol lean solution obtained from the reaction is concentrated by thin film evaporator, and then dehydrated and refined to obtain qualified ethylene glycol products and by-products. 2. Ethylene oxide sulfuric acid catalyzes water legal ethylene oxide and water are synthesized into ethylene glycol under the catalysis of sulfuric acid under the pressure of 60-80 ℃ and 9.806-19.61kPa. The reaction liquid is neutralized with liquid alkali, and the water is distilled off through the evaporator to obtain 80 ethylene glycol, and then distilled and concentrated in the distillation column to obtain more than 98 finished products. This method is an early development method. Due to corrosion, pollution and product quality problems and complicated refining process, countries have gradually stopped using it and changed to direct water law. 3. Ethylene direct water synthesis of ethylene glycol directly from ethylene without ethylene oxide. 4. Dichloroethane hydrolysis. 5. Formaldehyde method.