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Preparation method of methyl cyclopentene

A technology of methylcyclopentene and methylcyclopentadiene, which is applied in the field of preparation of methylcyclopentene, can solve problems such as large reflux ratio, reduce operating costs, reduce equipment investment, and simplify the separation and refining system Effect

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the close boiling points of methylcyclopentane and methylcyclopentene, a larger reflux ratio is required to obtain high-purity products

Method used

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  • Preparation method of methyl cyclopentene
  • Preparation method of methyl cyclopentene
  • Preparation method of methyl cyclopentene

Examples

Experimental program
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Effect test

Embodiment 1～10

[0024] The technological process of embodiment 1~10 sees figure 1 , the raw material W1 first enters the reactive distillation tower for depolymerization reaction, and the top of the tower obtains the depolymerization product W2 rich in CPD. The theoretical plate number of the reactive distillation tower is 50, and the side line can obtain the depolymerization product W3 rich in MCPD. The heavy component impurities are regularly discharged from the tower kettle. W3 enters the fixed bed reactor for hydrogenation to obtain the hydrogenated product W4, which is polymerized in the dimerization reactor and separated from the methylcyclopentene refining tower to finally obtain the finished MCPE product W5.

[0025] The reaction process is as follows:

[0026] (1) The raw material ethylene cracking C9 fraction passes through the depolymerization rectification tower, and the dicyclopentadiene and dimethylcyclopentadiene in the fraction under normal pressure are depolymerized, and the...

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Abstract

The invention discloses a preparation method of methyl cyclopentene. The preparation method comprises the following steps: 1) carrying out depolymerization rectification on a raw material ethylene cracking C9 fraction to generate methyl cyclopentadiene; 2) mixing methyl cyclopentadiene, a solvent and hydrogen, and then carrying out catalytic hydrogenation reaction; 3) removing a trace amount of methyl cyclopentadiene in a hydrogenation product through a dimerization reaction; and 4) separating the material through a methyl cyclopentene refining tower to obtain methyl cyclopentene at the tower top. According to the preparation method, the methyl cyclopentene is used as a hydrogenation reaction solvent, and a hydrogenation and dimerization reaction combined method is adopted, so that on the premise of ensuring a good hydrogenation reaction effect, the separation and refining process can be simplified, the energy consumption can be reduced, and the high-purity methyl cyclopentene with the content of more than 99% can be obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of methylcyclopentene, specifically, it relates to a method for preparing methylcyclopentene by using ethylene cracking C9 fraction as a raw material, especially by adopting a combination process of selective hydrogenation and dimerization reaction A method for preparing high-purity methylcyclopentene. Background technique [0002] Methylcyclopentene (MCPE) is a branched cyclic monoolefin. It is a very scarce fine chemical raw material and can be used to produce various pesticides and synthesize various high-grade trimer polymer materials. There are few references for the preparation of methylcyclopentene in the prior art, and the general chemically feasible synthesis method does not have economic feasibility. At present, the method of selective hydrogenation of methylcyclopentadiene (MCPD) has the most industrial application prospect . [0003] Existing typical technology such as US 454760,...

Claims

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Application Information

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IPC IPC(8): C07C13/12C07C5/05
CPCC07C5/05C07C13/12
Inventor 黄勇常慧叶军明陆鑫瞿卫国夏蓉晖曹强孙骏
Owner CHINA PETROLEUM & CHEM CORP
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