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Continuous synthesizing method of vinyl isobutyl ether

A technology of vinyl isobutyl ether and synthesis method, which is applied in the direction of organic chemistry, can solve the problems of poor safety and reliability, and achieve the effects of stable reaction, clean production environment and low unit consumption

Inactive Publication Date: 2005-12-21
孟永华
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Problems solved by technology

There is a certain risk in this method, and the safety and reliability are poor.

Method used

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  • Continuous synthesizing method of vinyl isobutyl ether

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Embodiment Construction

[0009] Continuous Synthesis of Vinyl Isobutyl Ether:

[0010] The synthesis tower is filled with 50-80% of the liquid level catalyst containing isobutanol solution containing KOH, and the KOH content in the solution is 12-20%.

[0011] The acetylene gas from the acetylene gas tank enters the primary inlet of the acetylene compressor after being refrigerated and dehydrated. After being compressed, the gas enters the drying tower to remove impurities. Then, the protective gas of acetylene and isobutanol enters after being mixed evenly through the nozzle from the bottom of the synthesis tower. Synthesis tower, the synthesis reaction is carried out in the synthesis tower, the catalyst solution is continuously pumped to the upper part of the synthesis tower through the circulating pump at the bottom of the tower, and circulated, and the small acetylene bubbles formed are fully contacted with isobutanol in the synthesis tower to carry out synthesis etherification reaction. The temp...

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Abstract

This invention has disclosed a kind of continuous sythesizing method for vinyl-isobutyl ether. It regards acetylene and isobutyl alcohol as reaction raw materials, process synthesis reaction in converter, within which fills the catalyst solution with liquid location 50-80 percent. Acetylene and isobutyl alcohol gas get into the tower from converter bottom muzzle after mixed evenly, catalyst solution in the bottom get to top of the tower successively through circulation pump, carrying on circulation, after the small acetylene air bubble meet the isobutyl alcohol, they take etherification in converter, the etherification temperature is 125-150Deg. C, the converter pressure is 0.3-0.6Mpa; the catalyst is isobutyl alcohol solution including KOH, vinyl-isobutyl ether produced in reaction and acetylene and isobutyl alcohol not reacting, export from the top of the converter, through condenser it enter receive pot, then can make the vinyl-isobutyl ether of the finished product by the after-treatment. This reaction is safe and its reliability is good, the one way conversion ratio of acetylene and synthesis reaction harvest rate are high, the content of acetylene is low in the tail gas.

Description

Technical field: [0001] The invention relates to a continuous synthesis method of vinyl isobutyl ether. It belongs to the technical field of organic synthesis. Background technique: [0002] Vinyl isobutyl ether is the main raw material for the polymerization of vinyl chloride-vinyl isobutyl ether, and it is also an intermediate in pharmaceutical synthesis and chemical production. Before the present invention is made, usually adopt the mixed gas of acetylene and nitrogen and isobutanol to carry out reverse contact in synthesis tower and carry out etherification reaction and continuously synthesize vinyl isobutyl ether (CN021382589). There is a certain risk in this method, and the safety and reliability are relatively poor. The one-way conversion rate of acetylene and the synthesis reaction yield are low, the purity of the reaction product vinyl isobutyl ether is low, and the content of acetylene in the tail gas discharge is high: the single-pass conversion rate of acetylen...

Claims

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Application Information

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IPC IPC(8): C07C43/16
Inventor 孟永华杨伟东李驰
Owner 孟永华
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