Continuous rectification process for ethylene glycol dimethyl ether

The invention discloses a continuous rectification process for ethylene glycol dimethyl ether, which comprises the following steps: feeding a desalted reaction solution into a pre-separation tower for preliminary rectification, recovering unreacted raw materials at the tower bottom and obtaining aze...

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Main Authors CHEN WEI, XU SHUJIAN, HAN JINGCHENG, HAN YONGSHENG, HOU SONGSHAN, XU JIANSHENG, FAN HONGKUI, HAN GENSHENG
Format Patent
LanguageChinese
English
Published 02.07.2021
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention discloses a continuous rectification process for ethylene glycol dimethyl ether, which comprises the following steps: feeding a desalted reaction solution into a pre-separation tower for preliminary rectification, recovering unreacted raw materials at the tower bottom and obtaining azeotropic ethylene glycol dimethyl ether and water at the tower top, wherein the temperature of the tower bottom of the pre-separation tower is 115-125 DEG C and the temperature of the tower top of the pre-separation tower is 80-85 DEG C; feeding the azeotropic ethylene glycol dimethyl ether and water continuously into vaporization permeable membrane separation equipment for dehydration, wherein the water content of the dehydrated ethylene glycol dimethyl ether is less than 1%; feeding the dehydrated ethylene glycol dimethyl ether into a dehydrating tower for continuous dehydration, wherein the tower bottom temperature of the dehydrating tower is 90-95 DEG C, and the tower top temperature of the dehydrating tower is
Bibliography:Application Number: CN202110344118