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The production method of 5-ethylidene-2-norbornene enb

A production method and a norbornene technology are applied in the production field of 5-ethylidene-2-norbornene ENB, can solve the problems of high energy consumption, low product purity and the like, and achieve low energy consumption, high product purity, The effect of fewer by-products

Active Publication Date: 2016-08-17
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low product purity and high energy consumption in the prior art, and a new production method of 5-ethylidene-2-norbornene ENB is provided

Method used

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  • The production method of 5-ethylidene-2-norbornene enb

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The production scale of 5-ethylidene-2-norbornene ENB is 1000t / a.

[0022] The reaction raw materials cyclopentadiene 91.6kg / h and 1,3-butadiene 96.9kg / h and the solvent toluene 1.22kg / h, DEHA 0.15kg / h are sent to the first reactor through the static mixer, and the reaction pressure 3.5MPaA, reaction temperature 140°C.

[0023] The reaction product of the first reactor enters the light removal tower, and the light components and other components are separated by a rectification tower. The pressure at the top of the tower is 0.030MPaA. 1.0. The light component obtained from the top of the light removal tower is sent back to the first reactor together with the raw materials, and the product in the bottom of the tower is separated by a weight removal tower. , the mixture is obtained at the top of the tower; the distillate of the tower still is further separated by a rectification tower, the pressure at the top of the tower is 0.018MPaA, the temperature of the tower still...

Embodiment 2

[0028] According to the conditions and steps described in Example 1, the ENB production scale is 2000 t / a, cyclopentadiene 200kg / h and 1,3-butadiene 190kg / h and solvent toluene 2.50kg / h, OTMPO0.75kg / h h, through the static mixer, and then sent to the first reactor, the reaction pressure is 3.0MPaA, and the reaction temperature is 130°C.

[0029] The reaction product of the first reactor enters the light removal tower, and the light components and other components are separated by a rectification tower. The pressure at the top of the tower is 0.030MPaA. 1.0. The light component obtained from the top of the light removal tower is sent back to the first reactor together with the raw materials, and the product in the bottom of the tower is separated by a weight removal tower. The mixture is obtained at the top of the tower; the distillate of the tower bottom is further separated by a rectification tower. The top distillate can be purified to obtain the pure product dicyclopentad...

Embodiment 3

[0034] According to the conditions and steps described in Example 1, the ENB production scale is 2000t / a, cyclopentadiene 200kg / h and 1,3-butadiene 190kg / h and solvent toluene 2.50kg / h, OTMPO0.75kg / h , passed through a static mixer, and then sent to the first reactor with a reaction pressure of 3.0MPaA and a reaction temperature of 130°C.

[0035] The reaction product of the first reactor enters the light removal tower, and the light components and other components are separated by a rectification tower. The pressure at the top of the tower is 0.094MPaA. 1.8. The light component obtained from the top of the light removal tower is sent back to the first reactor together with the raw materials, and the product in the tower bottom is separated by a heavy weight removal tower. The mixture is obtained at the top of the tower; the distillate of the tower still is further separated by a rectifying tower, the pressure at the top of the tower is 0.032MPaA, the temperature of the tower...

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Abstract

The invention relates to a production method of 5-ethylidene-2-norbornene ENB, which mainly solves the problems of low product purity and high energy consumption in the prior art. The present invention adopts a kind of production method of 5-ethylidene-2-norbornene ENB, comprises the following steps successively: (1) raw material and solvent are sent into the first reactor through static mixer; (2) first The reaction product of the reactor enters the light removal tower, the light components at the top of the tower return to the first reactor, and the heavy components of the tower tank enter the weight removal tower; (3) The components of the weight removal tower tank enter the DCPD tower, and the overhead distillate is purified Finally, the DCPD product is obtained; (4) the top component of the weight removal tower enters the VCH tower, the top of the tower gets VCH, the tower reactor component enters the VNB tower, the VNB tower reactor gets THI, and the tower top gets VNB; (5) VNB enters isomerization Reactor, the technical solution for obtaining ENB products better solves the above problems, and can be used in the production of ENB.

Description

technical field [0001] The invention relates to a production method of 5-ethylidene-2-norbornene ENB. Background technique [0002] As the third monomer, ENB is an important raw material for the preparation of ethylene-propylene rubber. The vulcanization speed of the prepared rubber is faster than other third monomers, so it is also the most practically used one in the industrial production of ethylene-propylene rubber. [0003] Most of the existing ENB synthesis technologies are obtained by decomposing dicyclopentadiene (DCPD) to obtain cyclopentadiene (CPD), which is obtained by Diels-Alder addition reaction with butadiene. CN102123973A discloses a 5-ethylene - Preparation of 2-norbornene ENB, which describes the cleavage of dicyclopentadiene DCPD in an inert heat transfer fluid to give cyclopentadiene CPD, which is then reacted with butadiene to produce 5-vinyl-2-norbornene VNB , the final product 5-ethylidene-2-norbornene ENB was obtained through isomerization reaction,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/25C07C13/43C07C13/61C07C2/44C07C13/19C07C13/465
Inventor 杨兆银王福安吕世军徐怡王宇石张斌沙裕
Owner SINOPEC SHANGHAI ENG
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