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Method for producing dicyclopentadiene from coking byproduct

A coking by-product, dicyclopentadiene technology, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of low content and yield of dicyclopentadiene, and achieve low cost and simple process , Increase the effect of added value

Inactive Publication Date: 2013-03-27
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the depolymerization reaction of the dimer occurs above 100°C, and trimers and tetramers are formed at the same time, the content and yield of dicyclopentadiene produced by this process are low, and the content is 70-75%. , the yield is about 20%

Method used

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  • Method for producing dicyclopentadiene from coking byproduct

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The benzene head is introduced into the raw material tank, and the negative pressure -1kPa is adjusted through the blast negative pressure gas pipeline. The benzene head is auto-accumulated in the tank for 3 days. A certain amount of benzene was pumped through the magnetic drive pump and divided into the distillation kettle, heated to the kettle temperature of 50°C under total reflux, and then self-polymerized for 14 hours. When the column top temperature of the distillation column is 40 DEG C, total reflux is performed for 15 minutes and the pre-harvest fraction is harvested. When the temperature continues to rise to the column top temperature of 58 DEG C, total reflux is performed for 15 minutes, and 5% of water is added. Increase the steam into the kettle, extract the benzene water fraction, and gradually raise the temperature to the column top temperature of 78°C and the kettle temperature of 85°C, then extract the middle distillate until the column top temperature ...

Embodiment 2

[0056] The benzene head is introduced into the raw material tank, and the negative pressure is adjusted to -2kPa through the blast negative pressure gas pipeline. The benzene head is auto-accumulated in the tank for 6 days. A certain amount of benzene is pumped through the magnetic drive pump and divided into the still, heated to the still temperature of 60°C under total reflux, and then self-polymerized for 12 hours. When the column top temperature of the distillation column is 43 DEG C, total reflux is performed for 15 minutes and the pre-harvest fraction is harvested. When the temperature continues to rise to the column top temperature of 60 DEG C, total reflux is performed for 15 minutes and 10% of water is added. Increase the steam into the kettle, extract the benzene water fraction, and gradually raise the temperature to 80°C at the top of the column and 88°C at the top of the kettle, then take the middle distillate until the temperature at the top of the column is 96°C,...

Embodiment 3

[0058] The benzene head is introduced into the raw material tank, and the negative pressure is adjusted to -4kPa through the blast negative pressure gas pipeline. The benzene head will self-accumulate in the tank for 10 days. A certain amount of benzene was pumped through the magnetic drive pump and divided into the distillation kettle, heated to the kettle temperature of 70°C under total reflux, and then self-polymerized for 9 hours. When the column top temperature of the distillation column is 46 DEG C, total reflux is performed for 15 minutes and the pre-harvest fraction is harvested. When the temperature continues to rise to the column top temperature of 62 DEG C, total reflux is performed for 15 minutes and 15% of water is added. Increase the steam into the kettle, extract the benzene water fraction, and gradually raise the temperature to the column top temperature of 80°C and the kettle temperature of 92°C, then extract the middle distillate until the column top temperat...

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Abstract

The invention provides a method for producing dicyclopentadiene from a coking byproduct, which comprises the following steps: (1) light benzene which is a coking byproduct is primarily fractioned and auto-polymerized at normal temperature for 3 days to half a month; (2) an obtained product is heated and refluxed at a kettle temperature of 50-80 DEG C so as to be further polymerized; (3) distillation is carried out to remove impurities with low boiling points, such as carbon disulfide, alkane, olefin, and the like to obtain former fraction; (4) water is added for azeotropic distillation to remove benzene and unsaturated compounds to obtain benzene water fraction; and (5) temperature is continuously risen to distill and remove impurities with medium boiling points, such as hydrocarbon compounds, compounds containing nitrogen and sulphur, and the like to obtain intermediate fraction. The method utilizes the coking byproduct with a low additional value as a raw material, thereby improving the resource utilization rate, has simple process and low cost, and can obtain the dicyclopentadiene product with the purity higher than 93 percent or 95 percent without complicated processes of dimerization, depolymerization, extraction distillation, adsorption, and the like.

Description

technical field [0001] The invention relates to a production method of dicyclopentadiene, in particular to the production of dicyclopentadiene from coking by-products, and more specifically to the production of dicyclopentadiene by a special rectification method. Background technique [0002] Cyclopentadiene (CPD) can undergo reactions such as polymerization, hydrogenation, halogenation, addition, condensation and reduction, and has a wide range of uses. Cyclopentadiene has high activity and has become an important raw material in the organic synthesis industry. Such as the production of metal derivatives, epoxy resins, polymers, norbornene compounds, adamantane, glutaraldehyde, spices, pharmaceuticals and other fine chemicals. [0003] However, cyclopentadiene has a low boiling point of 41°C-42°C, low flash point, and is not easy to transport, so it is often polymerized into dicyclopentadiene (dicyclopentadiene, DCPD), with a boiling point of 166°C-170°C. The dicyclopenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C13/61C07C7/04C07C2/00
Inventor 杜亚平王国宏黄平平陶兰芬陆辉许进
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD