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Preparation method of high purity dicyclopentadiene

A technology for dicyclopentadiene and cyclopentadiene is applied in the field of preparation of high-purity dicyclopentadiene, which can solve the problems of complex process, multiple reactors, large equipment investment, etc., and achieves low production cost and high purification accuracy. , the effect of easy industrialization

Active Publication Date: 2013-05-22
山东玉皇盛世化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development and utilization of these three diolefins at home and abroad is earlier, but the purity of the produced DCPD is usually 70-80%, which can only be used as bicyclic resin or additive, and the comprehensive utilization value is single
[0004] The existing high-purity DCPD production process is mostly composed of multiple dimerization and depolymerization reaction processes and multiple rectification processes. Difficult to guarantee

Method used

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  • Preparation method of high purity dicyclopentadiene
  • Preparation method of high purity dicyclopentadiene

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The C5 distillate raw material enters the azeotropic tank and contacts with the low-pressure steam in countercurrent to make it vaporized. The operating pressure is 30KPa, the operating temperature is 105°C, and the liquid level is 40% of the height of the tank. The gasified product from the azeotropic tank enters The cracking reactor is cracked, the feed temperature is 240°C, the outlet temperature is 337°C, and the operating pressure is 30KPa. The cracked product is sent to the phase separation tank together with the water vapor as diluent to separate cyclopentadiene, and cyclopentadiene enters Polymerization is carried out in the dimerization reactor, and the product is crude dicyclopentadiene. The feed temperature of the dimerization reactor is 18°C, the outlet temperature is 35°C, the operating pressure is 480KPa, and the polymerization time is 2 hours. Dicyclopentadiene is sent to the rectification tower for vacuum distillation, wherein the temperature at the top o...

Embodiment 2

[0027] The C5 distillate raw material enters the azeotropic tank and contacts with the low-pressure steam in countercurrent to make it vaporized. The operating pressure is 35KPa, the operating temperature is 110°C, and the liquid level is 50% of the tank height. The cracking reactor is cracked, the feed temperature is 250°C, the outlet temperature is 340°C, and the operating pressure is 35KPa. The cracked product is sent to the phase separation tank together with the water vapor as diluent to separate cyclopentadiene, and cyclopentadiene enters Polymerization is carried out in the dimerization reactor, and the product is crude dicyclopentadiene. The feed temperature of the dimerization reactor is 20°C, the outlet temperature is 45°C, the operating pressure is 500KPa, and the polymerization time is 3.5 hours. Dicyclopentadiene is sent to the rectification tower for vacuum distillation, wherein the temperature at the top of the tower is 7°C, the temperature of the tower bottom is...

Embodiment 3

[0029] The C5 distillate raw material enters the azeotropic tank and contacts with the low-pressure steam in countercurrent to make it vaporized. The operating pressure is 40KPa, the operating temperature is 115°C, and the liquid level is 60% of the height of the tank. The cracking reactor is cracked, the feed temperature is 260°C, the outlet temperature is 342°C, and the operating pressure is 40KPa. The cracked product is sent to the phase separation tank together with the water vapor as diluent to separate cyclopentadiene, and cyclopentadiene enters Polymerization is carried out in the dimerization reactor, and the product is crude dicyclopentadiene. The feed temperature of the dimerization reactor is 23°C, the outlet temperature is 60°C, the operating pressure is 530KPa, and the polymerization time is 5 hours. Dicyclopentadiene is sent to the rectification tower for vacuum distillation, wherein the temperature at the top of the tower is 8°C, the temperature of the tower bott...

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly discloses a preparation method of high purity dicyclopentadiene. The preparation method comprises the following steps: using a C5 fraction as a byproduct of ethane prepared through petroleum cracking as a raw material, cracking to prepare cyclopentadiene after gasification, and preparing the high purity dicyclopentadiene through polymeric rectification. The invention adopts a method of cracking-dimerization-rectification, and has the characteristics of low production cost, high purification precision and easy industrialization.

Description

(1) Technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a method for preparing high-purity dicyclopentadiene. (2) Background technology [0002] Dicyclopentadiene (DCPD) is a by-product of petroleum cracking to ethylene and coal coking. Because DCPD contains active methylene and two conjugated double bonds, it has high reactivity, and can be copolymerized with various olefins or participate in various organic chemical reactions, making it widely used in synthetic rubber, resin, medicine, coating, fuel, Plasticizers, organic synthesis and other aspects have a wide range of uses. [0003] The main raw material for DCPD production is the C5 fraction from petroleum cracking. In the process of producing ethylene from petroleum cracking, the by-product C5 fraction accounts for 12-14%. my country’s ethylene processing capacity reached 7.5 million tons in 2005, and it can produce more than 1 million tons of C5 series product. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C13/61C07C2/50C07C7/04
Inventor 王胜伟王建伟戴俊堂许雷军朱建民
Owner 山东玉皇盛世化工股份有限公司
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