Method for directly co-preparing glycol dimethyl ether and ethylene glycol from ethylene glycol monomethyl ether

A technology of ethylene glycol monomethyl ether and ethylene glycol dimethyl ether, which is applied in the direction of ether preparation, alcoholysis preparation, and organic part exchange to prepare ether, etc., which can solve the problem of harsh reaction conditions, high reaction temperature, inability to metabolize out of the body, etc. problems, to achieve the effect of less side reactions and simple products
CN106554258AActive Publication Date: 2017-04-05DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2017-04-05

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Abstract

The invention provides a method for directly co-preparing glycol dimethyl ether and ethylene glycol from ethylene glycol monomethyl ether. The method specifically comprises the following steps: enabling a raw material ethylene glycol monomethyl ether and optional inert gas which is taken as carrier gas to pass through a reactor loaded with a solid acid catalyst; reacting under conditions with a reaction temperature ranging from 40 DEG C to 150 DEG C and reaction pressure ranging from 0.1 Mpa to 15.0 Mpa to generate glycol dimethyl ether and ethylene glycol, wherein mass space velocity of the raw material ethylene glycol monomethyl ether ranges from 0.05 h<-1> to 5.0 h<-1>; and volume concentration of the raw material ethylene glycol monomethyl ether is 1-100%, and volume concentration of the carrier gas is 0-99%. Under a low-temperature condition, the method takes solid acid as a catalyst and takes ethylene glycol monomethyl ether as the raw material to prepare glycol dimethyl ether and ethylene glycol with high selectivity; and meanwhile, formation of a byproduct 1,4-dioxane which pollutes the environment or damages a human body or an animal body is basically or completely avoided.
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Description

technical field

[0001] The application belongs to the field of chemistry and chemical engineering, and specifically relates to a method for directly preparing ethylene glycol dimethyl ether from ethylene glycol monomethyl ether and co-producing ethylene glycol. Background technique

[0002] Ethylene glycol dimethyl ether, the Chinese name is 1,2-dimethoxyethane (DME). At room temperature, ethylene glycol dimethyl ether is a colorless and transparent liquid with an ether smell. It is an aprotic polar solvent with excellent performance. Carbon (C1-C6) alcohols, ketones, esters and other organic solvents are miscible in any proportion, and have strong solubility for alkali metal compounds. Therefore, it can become an ideal solvent required in many organic synthesis reactions, and it is also widely used as a cleaning agent compound, as a textile printing and dyeing, paint and ink additives, fuel additives, and for organic compounds and pharmaceutical intermediates synthesis et...

Claims

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