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Production method for ENB (5-ethylene-2-norbornylene)

A production method and technology of norbornene, applied in the production field of 5-ethylidene-2-norbornene ENB, can solve the problems of low product purity and high energy consumption, and achieve high product purity, low energy consumption, good The effect of technical effects

Active Publication Date: 2014-10-15
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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  • Production method for ENB (5-ethylene-2-norbornylene)

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, passed through the static mixer, and then sent to the first reactor with a reaction pressure of 3.0MPaA and a reaction temperature of 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 dicyclo...

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 , 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 bottom...

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Abstract

The invention relates to a production method for ENB (5-ethylene-2-norbornylene) and mainly aims to solve the problems in the prior art that the purity of a product is low and the energy consumption is high. The adopted production method for the ENB comprises the following steps: (1) raw materials and a solvent are sent to a first reaction vessel through a static mixer; (2) the reaction product in the first reaction vessel enters into a light component removing tower, tower top light components return to the first reaction vessel and tower kettle heavy components enter into a heavy component removing tower; (3) the kettle components of the heavy component removing tower enter into a DCPD tower, and tower top distilled liquid is purified to obtain a DCPD product; (4) the heavy component removing tower kettle components enter into a VCH tower, the VCH is obtained at the tower top; tower kettle components enter into a VNB tower, THI is obtained in a VNB tower kettle and the VNB is obtained at the tower top; (5) VNB enters into an isomerization reaction vessel to obtain ENB. The problems are better solved by the technical scheme and the production method can be applied in the ENB production.

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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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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