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Process for producing high purity dicyclo pentylene

A dicyclopentadiene, production process technology, applied in the production process of dicyclopentadiene, can solve the problems of affecting the speed of depolymerization, low temperature of depolymerization, coking, etc., to reduce coking and increase the speed of depolymerization reaction and the effect

Inactive Publication Date: 2006-06-07
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the depolymerization temperature is too low, it will affect the depolymerization speed; if the temperature is high, it will cause serious coking

Method used

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  • Process for producing high purity dicyclo pentylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 400g crude C 5 Cut obtains the thick DCPD 323g that DCPD content is 80.2% after 40 ℃ dimerization 1 hour (process 2) and delight component (process 3); The number of trays in the distillation tower is 10, and the catalyst is SiO after 10% sulfuric acid treatment. 2 , the depolymerization temperature was 150-160°C, and 242g of fractions with a total DCPD+CPD content of more than 99% were obtained; 240g of DCPD with a purity of 99.5% was obtained after entering 100°C dimerization (process 5) and vacuum distillation (process 6).

Embodiment 2

[0034] 400g crude C 5 Cut obtains the thick DCPD 320g that DCPD content is 80.8% after 40 ℃ dimerization 1 hour (process 2) and delight component (process 3); The number of trays in the distillation column is 10, and the catalyst is SiO after 10% hydrochloric acid treatment. 2 , the depolymerization temperature was 150-160°C, and 232g of fractions with a total DCPD+CPD content of more than 99% were obtained; 229g of DCPD with a purity of 99.5% was obtained after entering 100°C dimerization (process 5) and vacuum distillation (process 6).

Embodiment 3

[0036] 400g crude C 5 Distillation is 81.3% crude DCPD334g obtained DCPD content after 1 hour (process 2) and delight component (process 3) of fraction through 40 ℃ of dimerization; The number of trays of the tower is 10, and the catalyst is Al after 10% sulfuric acid treatment 2 o 3 , the depolymerization temperature was 150-160°C, and 255g of fractions with a total DCPD+CPD content of more than 99% were obtained; 251g of DCPD with a purity of 99.5% was obtained after entering 100°C dimerization (process 5) and vacuum distillation (process 6).

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Abstract

The present invention provides a technological process of producing high purity dicyclopentadiene (DCPD) with petroleum cracking C5 fraction as main material. The process includes the following steps: 1. dimerizing C5 fraction and eliminating light components to obtain coarse DCPD; 2. catalytically depolymerizing the coarse DCPD at 100-200 deg.c in the presence of inorganic carrier supported acid catalyst to obtain high purity CPD; and 3. dimerizing CPD and eliminating light components to obtain high purity DCPD. The present invention is a low temperature catalytic depolymerizing process with low scaling, and effectively raised depolymerizing reaction rate and depolymerizing reaction selectivity.

Description

(1) Technical field [0001] The invention relates to a production process of dicyclopentadiene. (2) Background technology [0002] Dicyclopentadiene (DCPD for short) 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 it can be copolymerized with various olefins or participate in various organic chemical reactions, making it suitable for synthetic rubber, resin, medicine, coating, fuel, and additives. Plastics, organic synthesis and other aspects have a wide range of uses. [0003] A particular use of DCPD is in thermoset polymeric materials, the properties of which are closely related to the purity of the DCPD used. The purity of DCPD is not only related to the use, but also affects the properties of the final polymerized material and may also affect the time of the polymerization reaction. DCPD for thermoset polymeric materials requires at least 99% purity. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/15C07C2/42C07C4/22
Inventor 慎炼江华黄银华高继虎
Owner CHINA PETROLEUM & CHEM CORP
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