Synthesis method of blocked ethylene glycol dimethyl ether

A technology of ethylene glycol dimethyl ether and a synthesis method, which is applied in chemical instruments and methods, preparation of ether, preparation of ether by exchange of organic parts, etc., can solve problems such as pollution and post-processing difficulties, and reduce production costs and raw materials Use variety, easy-to-control effects

Inactive Publication Date: 2020-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is an organic synthesis, which is easy to produce a large amount of sodium salt, has certain pollution, difficult post-processing, and has certain limitations to industrial production.

Method used

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Examples

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preparation example Construction

[0036] According to one embodiment of the present application, the synthesis method of blocked ethylene glycol dimethyl ether includes: using ethylene glycol monomethyl ether as a raw material, heteropoly acid or molecular sieve as a catalyst, and preparing the said capped ethylene glycol dimethyl ether.

[0037] Optionally, the molecular sieve is selected from one or more of HZSM-5, H-beta, and HY molecular sieves.

[0038] Optionally, the heteropolyacid is selected from one or more of phosphotungstic acid and silicotungstic acid.

[0039] Optionally, the catalyst is added in an amount of 0.1%-10% by mass of the raw material.

[0040] Optionally, the conditions of the etherification reaction are: a reaction temperature of 100-300° C., and a reaction time of 2-10 hours.

[0041] Optionally, the conditions of the etherification reaction are: a reaction temperature of 120-250° C., and a reaction time of 2-6 hours.

Embodiment 1

[0043] The present embodiment provides a kind of synthetic method of capping ethylene glycol dimethyl ether, specifically comprises the following steps: in the autoclave of 50ml, add 20g ethylene glycol monomethyl ether, 0.25g H-beta (silicon aluminum ratio is 40) Catalyst. Carry out nitrogen replacement after sealing the kettle, then heat up to 200 degrees, react for 2 hours. After the reaction, the temperature was lowered to room temperature. Sampling analysis. The conversion rate of ethylene glycol monomethyl ether is 48%, and the selectivity of capped ethylene glycol dimethyl ether can reach 48%.

Embodiment 2

[0045] The present embodiment provides a kind of synthetic method of blocked ethylene glycol dimethyl ether, specifically comprises the following steps: in the autoclave of 50ml, add 20g ethylene glycol monomethyl ether, 0.5g H-beta (silicon aluminum ratio is 25) Catalyst. Carry out nitrogen replacement after sealing the kettle, then heat up to 200 degrees, react for 6 hours. After the reaction, the temperature was lowered to room temperature. Sampling analysis. The conversion rate of ethylene glycol monomethyl ether is 65%, and the selectivity of capped ethylene glycol dimethyl ether can reach 56%.

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PUM

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Abstract

The invention discloses a synthesis method of blocked ethylene glycol dimethyl ether, which is characterized in that a raw material containing ethylene glycol monomethyl ether is in contact reaction with a catalyst to obtain the blocked ethylene glycol dimethyl ether, wherein the catalyst is selected from at least one of heteropolyacid and a molecular sieve. According to the method, only ethyleneglycol monomethyl ether is used as the raw material, so that a potential production route for producing the blocked ethylene glycol dimethyl ether is provided.

Description

technical field [0001] The application relates to a synthesis method of blocked ethylene glycol dimethyl ether, which belongs to the technical field of chemical industry. Background technique [0002] Blocked ethylene glycol dimethyl ether is stable in nature, not easy to react chemically, and has good solubility, so it has important applications. It can be used in the production fields of electrochemistry, boron chemistry, semiconductor, solar silicon wafer, medicine, etc.; it can also be used in the fields of paint remover, thinner, cleaning agent, antioxidant, etc.; at the same time, it is an oxygen-containing compound with high cetane number and energy density, it is a potential oxygen-containing ether liquid fuel. [0003] At present, among the synthesis methods of capped ethylene glycol dimethyl ether compounds, the most commonly used method is the Williamson synthesis method, which is also the method adopted in industrial scale production. But this method is an orga...

Claims

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Application Information

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IPC IPC(8): C07C41/14C07C43/11B01J31/18B01J31/16B01J29/40B01J29/08B01J29/70
CPCB01J23/30B01J27/188B01J29/084B01J29/40B01J29/7007C07C41/14C07C43/11
Inventor 于维强徐杰高进孙志强苗虹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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