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Method for producing ethylene glycol mono-tert-butyl ether

A technology of mono-tert-butyl ether and methyl-tert-butyl ether, which is applied in the field of producing ethylene glycol mono-tert-butyl ether, can solve the problem of affecting product purity, high content of impurities such as diisobutylene, and moles of isobutylene and ethylene glycol. Bigger than other issues

Active Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the prior art has the following deficiencies: (1) due to the use of inorganic acid as a catalyst, waste acid has been generated, and there is a problem in the disposal of waste acid, (2) because a large amount of isobutylene participates in the gas stripping, resulting in isobutylene and ethylene glycol If the molar ratio of alcohol is too large, the content of impurities such as dimeric isobutylene is high, which will affect the purity of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The macroporous sulfonic acid type cationic resin catalyst of 50g particle diameter 0.1~1.3mm, ethylene glycol (mass content 99.0%) 379.8g and MTBE (mass content 99.0%) 88.9g are added in the 1L reactor with stirring, will The reaction temperature was controlled at 60°C, and the reaction pressure was controlled at 0.2 MPa. After stirring for 1 hour, the catalyst was cooled and filtered; the reaction product was analyzed, and the selectivity of ethylene glycol mono-tert-butyl ether was 98.8%, and the conversion rate of MTBE was 94.87%.

Embodiment 2

[0026] The macroporous sulfonic acid type cationic resin catalyst of 50g particle diameter 0.1~1.3mm, ethylene glycol (mass content 99.0%) 126.6g and MTBE (mass content 99.0%) 88.9g are added in the 1L reactor with stirring, will The reaction temperature was controlled at 60° C., the reaction pressure was controlled at 0.2 MPa, and after stirring for 1 hour, the catalyst was cooled and filtered; the reaction product was analyzed, and the selectivity of ethylene glycol mono-tert-butyl ether was 97.8%, and the conversion rate of MTBE was 93.6%.

Embodiment 3

[0028] The macroporous sulfonic acid type cationic resin catalyst of 100g particle diameter 0.1~1.3mm, ethylene glycol (mass content 99.0%) 379.8g and MTBE (mass content 99.0%) 88.9g are added in the 1L reactor with stirring, will The reaction temperature was controlled at 60°C, the reaction pressure was controlled at 0.2 MPa, and after stirring for 1 hour, the catalyst was cooled and filtered; the reaction product was analyzed, and the selectivity of ethylene glycol mono-tert-butyl ether was 98.9%, and the conversion rate of MTBE was 94.78%.

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Abstract

The invention belongs to the technical field of organic chemical industry, and particularly relates to a method for producing ethylene glycol mono-tert-butyl ether. The method comprises: adding a solid catalyst, ethylene glycol and methyl tert-butyl ether to a reaction kettle, carrying out a reaction, and filtering to remove the solid catalyst after completing the reaction so as to obtain the ethylene glycol mono-tert-butyl ether product. According to the present invention, the efficient, rational and environmentally-friendly ethylene glycol mono-tert-butyl ether production method is provided;by adjusting the reaction temperature, the reaction pressure and the molar ratio of the raw materials, the generated ethylene glycol mono-tert-butyl ether has high selectivity, and the MTBE has highconversion rate, wherein the selectivity is more than 95%, and the MTBE conversion rate is more than 93%.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, in particular to a method for producing ethylene glycol mono-tert-butyl ether. Background technique [0002] Ethylene glycol mono-tert-butyl ether has many advantages such as high flash point, non-flammability, and low toxicity. It is widely used in water-based surface coatings, jet fuel anti-icing agents, brake fluids, inks, dyes, medicines, spices and cleaning agents, and can also be used as the base fluid for synthetic brake fluids in the automotive industry. [0003] At present, ethylene glycol mono-tert-butyl ether is mainly prepared by reacting isobutylene with ethylene glycol. CN106397137A has introduced a kind of method for preparing dibasic alcohol mono-tert-butyl ether, this method is to pass gas isobutene and liquid phase dibasic alcohol into the catalyst bed layer in the middle part of the reactor, after dibasic alcohol mono-tert-butyl ether is produced Evaporated ...

Claims

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Application Information

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IPC IPC(8): C07C41/14C07C43/13
CPCC07C41/14C07C43/13
Inventor 朱相春菅秀君王申军贾庆龙解洪梅
Owner CHINA PETROLEUM & CHEM CORP