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Butadiene preparing method

A technology of butadiene and vinyl acetylene, which is applied in chemical instruments and methods, hydrogenation to hydrocarbons, parts of acetylene gas generators, etc. Low, high reaction efficiency, improve the effect of comprehensive utilization of materials

Inactive Publication Date: 2018-03-23
李瑞雪 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's increasingly scarce oil resources lead to higher and higher production costs of butadiene and supply risks. Therefore, the production of butadiene by the acetylene method is still the most economical choice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The embodiment of the present invention provides a method for producing butadiene. Firstly, acetylene gas is prepared by using calcium carbide as a raw material, and then vinyl acetylene is prepared by using acetylene as a raw material, and then hydrogen gas is generated after dehydrogenation reaction using liquefied petroleum gas as a hydrogen source. , and then separate the generated hydrogen, pass it into vinyl acetylene and mix and react to form butadiene;

[0017] Concrete preparation process comprises the following steps:

[0018] Crush the calcium carbide and add it to the first reactor. At the same time, feed water into the first reactor to react with the calcium carbide to generate acetylene gas. The reaction temperature is 85°C. The specific reaction formula is: CaC 2 +2H 2 O→Ca(OH) 2 +C 2 h 2 , and then the generated acetylene gas is washed and cooled by water to remove the hydrogen sulfide gas, phosphine gas and calcium carbide impurities in the acetylen...

Embodiment 2

[0023] A method for producing butadiene. First, calcium carbide is used as raw material to prepare acetylene gas, and then acetylene is used as raw material to prepare vinyl acetylene, and then liquefied petroleum gas is used as hydrogen source to generate hydrogen after dehydrogenation reaction, and then the generated hydrogen is Separated, passed into vinyl acetylene and mixed reaction to generate butadiene;

[0024] Concrete preparation process comprises the following steps:

[0025] Crush the calcium carbide and add it to the first reactor. At the same time, feed water into the first reactor to react with the calcium carbide to generate acetylene gas. The reaction temperature is 80°C. The specific reaction formula is: CaC 2 +2H 2 O→Ca(OH) 2 +C 2 h 2 , and then the generated acetylene gas is washed and cooled by water to remove the hydrogen sulfide gas, phosphine gas and calcium carbide impurities in the acetylene gas, and the acetylene gas after water washing and cooli...

Embodiment 3

[0030] A method for producing butadiene. First, calcium carbide is used as raw material to prepare acetylene gas, and then acetylene is used as raw material to prepare vinyl acetylene, and then liquefied petroleum gas is used as hydrogen source to generate hydrogen after dehydrogenation reaction, and then the generated hydrogen is Separated, passed into vinyl acetylene and mixed reaction to generate butadiene;

[0031] Concrete preparation process comprises the following steps:

[0032] The calcium carbide is crushed and added to the first reactor, and at the same time, water is passed into the first reactor to react with the calcium carbide to generate acetylene gas. The reaction temperature is 100°C, and the specific reaction formula is: CaC 2 +2H 2 O→Ca(OH) 2 +C 2 h 2 , and then the generated acetylene gas is washed and cooled by water to remove the hydrogen sulfide gas, phosphine gas and calcium carbide impurities in the acetylene gas, and the acetylene gas after water...

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PUM

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Abstract

The invention provides a butadiene preparing method and relates to the technical field of organic chemistry. Butadiene is prepared based on combination of preparation of acetylene from calcium carbideand liquefied petroleum gas dehydrogenation. Firstly, acetylene is prepared from calcium carbide as the raw material; then vinyl acetylene is prepared from acetylene as the raw material; hydrogen isgenerated from liquefied petroleum gas as a hydrogen source through a dehydrogenation reaction; the generated hydrogen is separated out and introduced into vinyl acetylene for a mixed reaction, and butadiene is generated, so that hydrogen generated from the liquefied petroleum gas is consumed away; meanwhile, butadiene generated in the dehydrogenized liquefied petroleum gas is separated out by a dimethylformamide extracting solvent. The butadiene preparing method is low in cost and high in reaction efficiency, the existing route for preparing butadiene on the basis of extraction of ethylene cracking byproduct C4 and dehydrogenation of C4 alkane or alkene currently is broken, a novel route is provided for industrial production of butadiene, and a key technology is provided for fusion of traditional acetylene chemical engineering (coal chemical engineering) and petrochemical engineering.

Description

technical field [0001] The invention relates to the technical field of organic chemistry, in particular to a method for producing butadiene. Background technique [0002] Butadiene is an important petrochemical basic organic raw material and synthetic rubber monomer. Its position in petrochemical olefin raw materials is second only to ethylene and propylene, and it has a wide range of uses. It can not only be used in the production of organic chemical products such as adiponitrile, 1,4-butanediol, as well as adhesives, gasoline additives, etc., but also in the synthesis of butadiene rubber (BR) and styrene-butadiene rubber (SBR). , Nitrile rubber, styrene-butadiene-styrene elastomer (SBS), acrylonitrile-butadiene-styrene (ABS) resin and other rubber products. [0003] The production methods of butadiene that have been used in industry mainly include acetylene method, ethanol method, butene dehydrogenation method, butane dehydrogenation method, butene oxidative dehydrogenati...

Claims

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Application Information

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IPC IPC(8): C07C5/05C07C11/167
CPCC01B3/26C07C2/38C07C5/05C07C5/3332C07C2523/835C07C2523/89C07C2527/18C07C2527/185C10H11/00C10H21/00C07C11/167C07C11/30
Inventor 李瑞雪赵安平周晓埜赵一然李平贺华
Owner 李瑞雪
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