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Method for producing vinyl-4-hydroxybutyl ether through acetylene method, and catalyst thereof

The technology of hydroxybutyl vinyl ether and catalyst is applied in the production of 4-hydroxybutyl vinyl ether by acetylene method. It can solve the problems of difficult recycling, low conversion rate of raw materials, and many side reactions, and achieve the effects of long life, high catalytic activity, and avoiding side reactions.

Inactive Publication Date: 2013-11-20
BOAI NKY PHARMA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] According to experiments, we have realized that the preparation methods introduced in German patent GB773331 and Chinese patent CN101898939 have shortcomings: low conversion rate of raw materials, many side reactions, a large number of undesirable by-products, and high price of additives , Difficult to recycle, difficult post-processing, low purity of finished products and other obvious disadvantages

Method used

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  • Method for producing vinyl-4-hydroxybutyl ether through acetylene method, and catalyst thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 1,4-butanediol into the reaction kettle, raise the temperature to 60°C, add potassium hydroxide, the mass ratio of potassium hydroxide and 1,4-butanediol is 0.05:100, stir, and keep the vacuum at -0.096 , and control the dehydration reaction temperature to 60° C., and obtain 1,4-butanediol potassium salt after the dehydration reaction is completed.

Embodiment 2

[0027] Add 1,4-butanediol into the reaction kettle, raise the temperature to 200°C, add potassium hydroxide, the mass ratio of potassium hydroxide and 1,4-butanediol is 15:100, stir, and keep the vacuum at -0.099 , and control the dehydration reaction temperature to 200°C, and obtain 1,4-butanediol potassium salt after the dehydration reaction is completed.

Embodiment 3

[0029] Add 1,4-butanediol into the reaction kettle, raise the temperature to 80°C, add potassium hydroxide, the mass ratio of potassium hydroxide and 1,4-butanediol is 5:100, stir, and keep the vacuum at -0.097 , and control the dehydration reaction temperature to 80° C., and obtain 1,4-butanediol potassium salt after the dehydration reaction is completed.

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Abstract

The present invention discloses a method for producing vinyl-4-hydroxybutyl ether through an acetylene method, and a catalyst thereof. According to the present invention, an catalysis amount of a 1,4-butylene glycol potassium salt and 1,4-butylene glycol are mixed, acetylene is introduced, a reaction temperature is controlled to 80-150 DEG C, acetylene pressure is controlled to 0.1-2 MPa, and the obtained material is transferred into a rectification tower to be subjected to rectification after the complete reaction to obtain vinyl-4-hydroxybutyl ether; and compared with the catalyst in the prior art, the catalyst of the present invention has the following characteristics that: generation of side reactions can be effectively prevented, catalysis activity is high, and a service life is long.

Description

technical field [0001] The invention relates to an acetylene method for producing 4-hydroxybutyl vinyl ether. Background technique [0002] The general method adopted in industrialized production of hydroxybutyl vinyl ether is the acetylene method, and the reaction formula is as follows: [0003] [0004] German patent GB773331 introduces a method for preparing dihydric alcohol monovinyl ether. Compared with other acetylene methods, nitrogen gas is introduced into the reaction and a packed reaction tower is used. [0005] Chinese patent CN101898939 introduces a reaction method in which dimethyl sulfoxide is used as a cosolvent and a cationic surfactant is added as a cocatalyst. [0006] Using the acetylene method, using potassium hydroxide as a catalyst, a series of side reactions will occur under high temperature and high pressure, and the survival time of the catalyst is short. At the same time, in the presence of potassium hydroxide, 4-hydroxybutyl vinyl ether will it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C07C31/30C07C29/70C07C43/178C07C41/08
Inventor 王红兵王坚强
Owner BOAI NKY PHARMA LTD
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