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Diethylene glycol (Diethylene glycol)

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Diethylene glycol

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2,2'-Oxydiethanol
Bis(2-hydroxyethyl)ether
DEG
Ethanol, 2,2‘-oxybis-

+Expand -Stow

111-46-6

C4H10O3

106.12

2909410000

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Nature Description

Colorless or light yellow oily liquid. Freezing point-6.5 ℃, boiling point 944.8 ℃, relative density 1.1164(20/4 ℃), refractive index 1.4475, flash point 143 ℃. It is miscible with ethanol, ether, acetone and ethylene glycol, insoluble in benzene and carbon tetrachloride, and soluble in water. Spicy and slightly sweet, hygroscopicity.

1.11

245℃

-10℃

-10.45℃

143℃

可溶

1.445-1.448

可溶

Product Applications

It is used for the preparation of plasticizer, and is also used as extractant, desiccant, insulation agent, softening agent, solvent, etc. Diethylene glycol is mainly used for dehydration of natural gas and aromatic extraction, and is used as solvent for ink binding and textile dye, it is also used for rubber and resin plasticizer, polyester resin, fiber glass,..

Production method

1. Diethylene glycol is a by-product of ethylene oxide to ethanol. 111-46-6 preparation

Process flow: use direct water method to mix ethylene oxide and water into the mixing reactor at 1:8, and react for 40-60min at 150℃ MPa to generate dehydration tower for further dehydration; the ethylene glycol mixture at the bottom of the tower is sent to the ethylene glycol Tower, and the top of the tower can get more than 99.8% ethylene glycol. The bottom liquid of the column is sent to a shrinkage distillation column, and diethylene glycol is obtained from the top of the column under the temperature of 135-140 ℃ and the pressure of 4.0KPa. Continue to separate, you can get two triethylene glycol, three tetraethylene glycol. Refining method: the impurities contained include water, ethylene glycol, triethylene glycol, etc. It can be refined by fractional crystallization after vacuum distillation. Take diethylene glycol 1650ml for vacuum distillation, discard 480ml primary fraction, collect 1000ml intermediate fraction for step-by-step crystallization, and get 700ml diethylene glycol. 2. Ester is generated when it interacts with anhydride, and ether is generated when it interacts with alkyl sulfate or halohydrocarbon. 3. Synthesis: made by the action of ethylene oxide and ethylene glycol. It is also a by-product of ethylene oxide hydration to ethylene glycol.

Security

Dangerous Goods Marking： Xn

Safety instructions： S46: in case of accidental swallowing, seek doctor's advice immediately (display product container or label).

Hazardous material category code： R22: swallowing is harmful.

Symbols： GHS07,GHS08

Storage conditions： Store in a cool and ventilated warehouse. Keep away from fire and heat source. It should be stored separately with oxidant and acid, and should not be mixed. Equipped with corresponding varieties and quantities of fire fighting equipment. The storage area shall be equipped with leakage emergency treatment equipment and appropriate containment materials.

Signal word： Warning

Hazard Statement： H302;H373