Method for synthesizing norbornene by microchannel reactor

A micro-channel reactor, norbornene technology, applied in the direction of addition of unsaturated hydrocarbons to hydrocarbons, organic chemistry, etc., can solve the problem of increasing equipment investment and operating costs, and has not yet seen norbornene synthesis and norbornene conversion rate. Low problems, to avoid the generation of reaction hotspots, inhibit side reactions, improve safety and synthesis efficiency

Active Publication Date: 2017-06-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] 3. Excess ethylene and solvent need to be recovered and recycled, which increases equipment investment and operating costs, and the production cost is very high
Thereby overcoming the shortcomings of low conversion rate of norbornene synthesis, many by-products, and poor safety in conventional high-pressure reactors
However, there is no report on norbornene synthesis using a microchannel reactor.

Method used

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  • Method for synthesizing norbornene by microchannel reactor
  • Method for synthesizing norbornene by microchannel reactor
  • Method for synthesizing norbornene by microchannel reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare a dicyclopentadiene toluene solution with a mass fraction of 40 wt%, wherein the mass ratio of cyclopentadiene to dicyclopentadiene is 1:19. That is, dicyclopentadiene toluene solution is made up of cyclopentadiene and dicyclopentadiene of 40% mass total concentration and toluene as balance (that is, 60%), wherein cyclopentadiene and dicyclopentadiene mass The ratio is 1:19.

[0052] Under normal temperature conditions, ethylene is directly transported to the microchannel reaction device from the first side line feed port, and the dicyclopentadiene toluene solution is fed from the first side line feed port, the third side line feed port and the fifth side line feed port respectively. Be divided into three equal quantities and be transported in the tubular reaction device, ethylene volume flow is 4.00ml / min, and the volume flow of total dicyclopentadiene toluene solution is 0.45ml / min, the mol ratio of ethylene and dicyclopentadiene toluene ( The dicyclopentadie...

Embodiment 2

[0060] Prepare a dicyclopentadiene toluene solution with a mass fraction of 10 wt%, wherein the mass ratio of cyclopentadiene to dicyclopentadiene is 1:19. That is, the dicyclopentadiene toluene solution is composed of cyclopentadiene and dicyclopentadiene with a mass total concentration of 10% and toluene as a balance (that is, 90%), wherein cyclopentadiene and dicyclopentadiene mass The ratio is 1:19.

[0061] Under normal temperature conditions, ethylene is directly transported to the microchannel reaction device from the first side line feed port, and the dicyclopentadiene toluene solution is fed from the first side line feed port, the second side line feed port and the third side line feed port respectively. It is divided into three equal parts and transported in the tubular reaction device, the ethylene volume flow rate is 6.21ml / min, the volume flow rate of the total dicyclopentadiene toluene solution is 1.76ml / min, and the mol ratio of ethylene to dicyclopentadiene tol...

Embodiment 3

[0063] Prepare a dicyclopentadiene toluene solution with a mass fraction of 40 wt%, wherein the mass ratio of cyclopentadiene to dicyclopentadiene is 1:19.

[0064] Under normal temperature conditions, ethylene is directly transported from the first side feed port to the microchannel reaction device, and the dicyclopentadiene toluene solution is fed from the first side feed port, the third side feed port, and the fifth side feed port respectively. , The seventh side line feed port and the ninth side line feed port are divided into five equal parts and sent to the tubular reaction device, the ethylene volume flow rate is 1.85ml / min, and the total dicyclopentadiene toluene solution volume flow rate is 0.31ml / min min, the molar ratio of ethylene to dicyclopentadiene toluene solution is 1.0. Dicyclopentadiene is partially or completely decomposed into cyclopentadiene by heating and pre-decomposing in the preheating section before entering the reaction section. The preheating tempe...

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Abstract

The invention discloses a method for synthesizing norbornene by a micro-channel reactor. The micro-channel reactor comprises a reaction section, wherein the reaction channel of the reaction section is provided with more than two feed ports arranged in the material flowing direction. The method comprises the following steps of feeding dicyclopentadiene into the reaction channel of the reaction section from one of the feed ports, feeding ethylene into the reaction channel of the reaction section from the first feed port, and controlling the reaction temperature in the reaction channel to be 180-300 degrees centigrade and the pressure to be 5-30MPa, wherein the standing time in the reaction section is 0.5-10min, and the mol ratio of ethylene and dicyclopentadiene solution is (1-10):1. Bu utilizing the method, norbornene can be synthesized safely and efficiently by the micro-channel reactor.

Description

technical field [0001] The invention belongs to the technical field of organic compound synthesis, and relates to a method for synthesizing norbornene through a microchannel reactor; under high temperature and high pressure conditions, the microchannel reactor is used to realize the synthesis of ethylene and dicyclopentadiene or dicyclopentadiene and Mixture of cyclopentadiene to prepare norbornene. Background technique [0002] Norbornene is an important comonomer, which can prepare cycloolefin copolymers by non-ring-opening polymerization with α-olefins such as ethylene, propylene, and styrene under the action of Ziegler-Natta or metallocene catalysts. Cyclic olefin copolymers have low density, low hygroscopicity, high transparency, high heat resistance, high refractive index and excellent processability. They are amorphous thermoplastic polymer materials that have attracted great attention in the industry and academia in recent years. , has broad application prospects in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C13/42C07C2/50
Inventor 曹堃姚臻刘学宋月潇史家乐张岩
Owner ZHEJIANG UNIV
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