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Method for preparing dicyclopentadiene and emulsifying packed tower used thereby

A technology of dicyclopentadiene and packed towers, which is applied in the purification/separation of hydrocarbons, chemical instruments and methods, organic chemistry, etc., can solve the problems of high energy consumption and low yield of dicyclopentadiene, and achieve high separation efficiency , Simple structure and high efficiency

Inactive Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of low dicyclopentadiene yield and high energy consumption in the prior art, the invention provides a method for preparing dicyclopentadiene and the emulsification packed tower used, which can significantly increase the dicyclopentadiene yield, reduce energy consumption

Method used

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  • Method for preparing dicyclopentadiene and emulsifying packed tower used thereby
  • Method for preparing dicyclopentadiene and emulsifying packed tower used thereby
  • Method for preparing dicyclopentadiene and emulsifying packed tower used thereby

Examples

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Effect test

Embodiment 1

[0042] An emulsified packed tower with a diameter of 50mm and a metal Θ ring of Φ6*6*0.2 inside. The volume of the tower kettle is 1000ml and the height is 2.8 meters (equivalent to 40 theoretical plates). The middle part enters the reactive distillation tower, the feed temperature is controlled at 30°C, the tower top temperature is controlled at 56°C, the tower bottom temperature is increased to 90°C, the reflux ratio is controlled at 8, the tower top operating pressure is controlled at 0.20Mpa, and the cracking C5 The isoprene in the distillate is separated from the top of the tower together with other low-boiling point hydrocarbons through rectification, and the isoprene is separated in the extraction tower; and the cyclopentadiene in the feed is dimerized into dicyclopentadiene Together with piperylene and other high-boiling hydrocarbons, it is discharged from the bottom of the tower and sent to the piperylene tower and the dicyclopentadiene tower to obtain the product. Th...

Embodiment 2

[0053] An emulsified packed tower with a diameter of 50mm and a metal Θ ring of Φ6*6*0.2 inside. The volume of the tower kettle is 1000ml and the height is 2.8 meters (equivalent to 40 theoretical plates). The middle part enters the reactive distillation tower, the feed temperature is controlled at 30°C, the tower top temperature is controlled at 56°C, the tower bottom temperature is increased to 90°C, the reflux ratio is controlled at 13, the tower top operating pressure is controlled at 0.20Mpa, and the cracking C5 The isoprene in the distillate is separated from the top of the tower together with other low-boiling point hydrocarbons through rectification, and the isoprene is separated in the extraction tower; and the cyclopentadiene in the feed is dimerized into dicyclopentadiene Together with piperylene and other high-boiling hydrocarbons, it is discharged from the bottom of the tower and sent to the piperylene tower and the dicyclopentadiene tower to obtain the product. T...

Embodiment 3

[0057] An emulsified packed tower with a diameter of 50mm and a metal Θ ring of Φ6*6*0.2 inside. The volume of the tower kettle is 1000ml and the height is 5.5 meters (equivalent to 77 theoretical plates). The middle part enters the reactive distillation tower, the feed temperature is controlled at 30°C, the tower top temperature is controlled at 56°C, the tower bottom temperature is increased to 90°C, the reflux ratio is controlled at 8, the tower top operating pressure is controlled at 0.20Mpa, and the cracking C5 The isoprene in the distillate is separated from the top of the tower together with other low-boiling point hydrocarbons through rectification, and the isoprene is separated in the extraction tower; and the cyclopentadiene in the feed is dimerized into dicyclopentadiene Together with piperylene and other high-boiling hydrocarbons, it is discharged from the bottom of the tower and sent to the piperylene tower and the dicyclopentadiene tower to obtain the product. Th...

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Abstract

The invention discloses a method for preparing dicyclopentadiene and an emulsifying packed tower used thereby. The method of the invention comprises: feeding a raw material to be cracked to form C5 fraction into the emulsifying packed tower, performing distillation and thermal depolymerization in the emulsifying packed tower, obtaining light dydrocarbon which mainly consists of isoprene from the top of the emulsifying packed tower, delivering the light dydrocarbon to extraction tower directly, and obtaining an isoprene product; and delivering materials separated from the emulsifying packed tower to a pentadiene removing tower to obtain a dicyclopentadiene product. When the method of the invention is adopted, the loss of the isoprene in the raw material to be cracked to form the C5 fraction is reduced, the quality of the dicyclopentadiene is improved, the mass transfer effect of the equipment is reinforced, and the method and the emulsifying packed tower can be used for production in an industrial process conveniently.

Description

technical field [0001] The present invention relates to a method for preparing dicyclopentadiene and special equipment thereof. Specifically, it relates to a method for reacting cyclopentadiene to generate dicyclopentadiene by cracking C5 cuts through the combination of rectification and thermal dimerization by reactive distillation and the used emulsification packed tower. Background technique [0002] "Pyrolysis C5" refers to the C5 fraction produced by the steam cracking ethylene plant. Making full use of this part of resources is of great significance to reduce the cost of ethylene, obtain high value-added products, and increase economic benefits. [0003] Since there are more than 20 kinds of components in the carbon five fraction, their boiling points are similar, and some of them also form azeotropes. The three most abundant dienes are isoprene (IP for short), piperylene ( PD for short), cyclopentadiene (CPD for short), they account for about 40-60% in the carbon fi...

Claims

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Application Information

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IPC IPC(8): C07C13/61C07C11/18C07C2/50C07C7/00B01J19/00
Inventor 胡競民冯海强高继东鲁耘刘永富
Owner CHINA PETROLEUM & CHEM CORP
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