Method for synthesizing 1-butene-3, 4-diol through gas-solid phase continuous isomerization

A technology of isomerization and gas-solid phase, applied in the direction of isomerization preparation, chemical instruments and methods, carbon compound catalysts, etc., can solve the problems of strong corrosiveness of catalysts, low product purity, cumbersome post-processing, etc., and achieve post-processing The effect of simplicity, high purity, and simplified post-processing

Active Publication Date: 2020-07-17
CHANGSHU CHANGJI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a gas-solid phase continuous flow method for the current 1-butene 3,4-diol synthesis process in view of the problems of strong catalyst corrosion, poor reusability, cumbersome post-treatment, and low product purity. Method for preparing and synthesizing 1-butene 3,4-diol

Method used

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  • Method for synthesizing 1-butene-3, 4-diol through gas-solid phase continuous isomerization
  • Method for synthesizing 1-butene-3, 4-diol through gas-solid phase continuous isomerization
  • Method for synthesizing 1-butene-3, 4-diol through gas-solid phase continuous isomerization

Examples

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Embodiment 1

[0028] Dissolve copper nitrate completely in deionized water, then add ZSM-5 molecular sieve into the above solution, stir evenly, wherein the mass ratio of copper nitrate to ZSM-5 is 3:100, and ultrasonically treat the above mixture twice under 60W condition , 5 minutes each time. Then let it stand for 10 hours, then dry it at 100°C, and record it as Cat1 for later use.

Embodiment 2

[0030] Dissolve copper nitrate completely in deionized water, then add MCM-22 molecular sieve into the above solution, stir evenly, wherein the mass ratio of copper nitrate to MCM-22 is 1:10, and ultrasonically treat the above mixture 4 times under 150W , 10 minutes each time. Then let it stand for 20 hours, then dry it at 120°C, and record it as Cat2 for later use.

Embodiment 3

[0032] Completely dissolve ferric sulfate in deionized water, then add HY molecular sieve into the above solution, stir evenly, wherein the mass ratio of ferric sulfate to HY is 15:100, and ultrasonically treat the above mixture 3 times under 200W, each time for 6 minute. Then let it stand for 6 hours, and then dry it at 100°C for later use, and record it as Cat3.

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Abstract

The invention relates to a method for synthesizing 1-butene-3, 4-diol through gas-solid phase continuous isomerization. According to the method, 2-butene-1, 4-diol is used as a raw material; a metal salt modified molecular sieve is used as a catalyst, continuous and efficient synthesis of 2-butene-1, 4-diol can be realized under the conditions of 200-260 DEG C, raw material liquid phase space velocity of 1-4h <-1 > and normal pressure, the single-pass conversion rate of the raw material is higher than 82%, and 1-butene-3, 4-diol selectivity is higher than 51%. The method is simple in process,green in process, good in catalyst stability, few in product impurity and simple in product post-treatment.

Description

technical field [0001] The invention relates to the field of heterogeneous catalysis, in particular to a method for synthesizing 1-butene-3,4-diol through gas-solid phase continuous isomerization. Background technique [0002] 1-butene-3,4-diol is an important raw material for the synthesis of vinyl ethylene carbonate and vinyl sulfite, which are additives for lithium-ion electrolytes, and is also an important pharmaceutical intermediate with important industrial and economic value. [0003] 1-butene-3,4-diol can be prepared by hydrogenation of polybutadiene peroxide, and polybutadiene peroxide is obtained by oxidation of butadiene. The disadvantage of this method is that 1-butene -3,4-diol contains by-product 2-butene-1,4-diol. 1-Butene-3,4-diol can also be produced by hydrolysis of vinyl epoxides, the disadvantage of this process is also that vinyl epoxides have to be produced by oxidation of butadiene. 1-Butene-3,4-diol can also be obtained from the acetoxylation by-pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/035C07C29/56
CPCC07C29/56C07C2529/46C07C2529/76C07C2529/14C07C2529/08C07C2529/24C07C2529/70
Inventor 傅人俊薛冰吴丰
Owner CHANGSHU CHANGJI CHEM
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