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Method for preparing methyl cyclopentene from cyclohexene

A technology of methylcyclopentene and cyclohexene, which is applied in the field of preparing methylcyclopentene from cyclohexene, can solve the problems of long process flow, expensive catalyst, complex reaction products, etc., and achieve simple reaction route and mild reaction conditions , the effect of separating simple

Pending Publication Date: 2021-08-10
CHONGQING HUAFON CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the industrial production of methylcyclopentene is mainly C in the refining and chemical industry. 6 Obtained by further catalytic reaction and rectification, the process flow is long, the catalyst is expensive, and the reaction product is complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get raw material cyclohexene (cyclohexene purity 99%wt), molecular sieve catalyst (control volume concentration 0.25), add in the cyclohexene reactor, the inner void volume of cyclohexene reactor is 200m 3 , control the reaction temperature at 110-112°C, the pressure at 0.4-0.42MPa, and the cyclohexene feed flow at 100-105m 3 / h, cyclohexene undergoes molecular rearrangement to obtain a mixture containing methylcyclopentene.

[0021] The obtained mixture is discharged into the rectification tower, the tower top temperature of the control rectification tower is 35-37 ℃, the tower bottom temperature is 60-63 ℃, and the reflux ratio is 10, and the separation obtains the methylcyclopentene target product, and the flow rate is 9-9.5m 3 / h with a purity of 93-94%.

Embodiment 2

[0023] Get raw material cyclohexene (cyclohexene purity 99%wt), molecular sieve catalyst (control volume concentration 0.3), add in the cyclohexene reactor, the inner void volume of cyclohexene reactor is 200m 3 , control the reaction temperature at 119-121°C, the pressure at 0.5-0.52MPa, and the cyclohexene feed flow at 140-143m 3 / h, cyclohexene undergoes molecular rearrangement to obtain a mixture containing methylcyclopentene.

[0024] The mixture that obtains is discharged in the rectification tower, and the tower top temperature of control rectification tower is 45-47 ℃, and tower bottom temperature is 70-72 ℃, and reflux ratio is 15, and separation obtains methylcyclopentene target product, and flow rate is 14-14.8m 3 / h, the purity is 94-95%.

Embodiment 3

[0026] Get raw material cyclohexene (cyclohexene purity 99%wt), molecular sieve catalyst (control volume concentration 0.35), add in the cyclohexene reactor, the inner void volume of cyclohexene reactor is 200m 3 , control the reaction temperature at 130-132°C, the pressure at 0.58-0.6MPa, and the cyclohexene feed flow at 180-183m 3 / h, cyclohexene undergoes molecular rearrangement to obtain a mixture containing methylcyclopentene.

[0027] The mixture that obtains is discharged in the rectification tower, and the tower top temperature of control rectification tower is 53-55 ℃, and tower bottom temperature is 79-81 ℃, and reflux ratio is 20, and separation obtains methylcyclopentene target product, and flow rate is 18-18.2m 3 / h, the purity is 94-95%.

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Abstract

A method for preparing methyl cyclopentene from cyclohexene comprises the following step: carrying out isomerization reaction on cyclohexene serving as a raw material in a reactor under the action of a molecular sieve catalyst at the reaction temperature of 100-160 DEG C and the reaction pressure of 0.3-0.8 MPa to obtain a mixture containing methyl cyclopentene. The method is simple in reaction route, the used catalyst is cheap and easy to obtain, on the basis of ensuring the conversion rate, the method has the advantages that the reaction condition is mild, the reaction product is easy to separate, no three wastes are generated in the reaction process, and the environment-friendly degree is high.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing methylcyclopentene from cyclohexene. Background technique [0002] Methylcyclopentene is an organic compound that is a colorless transparent liquid at normal temperature and pressure. Mainly used as reagents and chemical synthesis raw materials. [0003] At present, the industrial production of methylcyclopentene is mainly C in the refining and chemical industry. 6 Obtained through further catalytic reaction and rectification, the process flow is long, the catalyst is expensive, and the reaction product is complex. [0004] Therefore, how to design a production method of methylcyclopentene with simple process and mild reaction is an urgent problem to be solved by those skilled in the art. Contents of the invention [0005] The purpose of the present invention is to provide a method for preparing methylcyclopentene from cyclohexene in view of the defici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/29C07C13/12
CPCC07C5/29C07C2601/10C07C13/12
Inventor 陈恩之苗迎彬赵风轩赵培朝郭正谦朱伸兵
Owner CHONGQING HUAFON CHEM
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