Production technique of norbornene

A norbornene and production process technology, applied in the field of norbornene production process, can solve the problems that dicyclopentadiene is prone to polymerization and cannot be produced continuously, so as to achieve high product purity, avoid the generation of water vapor, and slow down carbonization problem effect

Active Publication Date: 2015-01-07
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the shortcoming that norbornene in the prior art cannot be continuously produced due to the easy polymerization of dicyclopentadiene during synthesis and carbonization on the reactor, and to provide a safe, reliable and stable continuous production Process for higher purity norbornene

Method used

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  • Production technique of norbornene
  • Production technique of norbornene
  • Production technique of norbornene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Adjust the temperature control systems, instruments and valves of the pilot plant in advance, and conduct leak detection. Add the dicyclopentadiene in the dicyclopentadiene storage tank 1 to the first heater 3 for preheating with a metering pump. The heating temperature is 170° C., and the vapor pressure is controlled at 10 MPa by adjusting the temperature. The hydrogen in the hydrogen storage tank 2 is preheated, and the dicyclopentadiene gas produced is mixed with the preheated hydrogen at a molar ratio of 1:30 in the first static mixer 4, and the mixed gas is pumped through the first metering pump 15 Into the first reactor 5, the feed flow rate of the first metering pump 15 is controlled to be 1mL / min, and cracking is carried out under the protection of excess hydrogen. In the first reactor 5, the controlled cracking temperature is 300 ° C, the reaction time is 10s, and the pressure is 10MPa. The mixture of products and reactants is drawn from the first reactor 5, a...

Embodiment 2

[0036]Adjust the temperature control systems, instruments and valves of the pilot plant in advance, and conduct leak detection. Add the dicyclopentadiene in the dicyclopentadiene storage tank 1 to the first heater 3 for preheating with a metering pump. The heating temperature is 190° C., and the vapor pressure is controlled at 15 MPa by adjusting the temperature. The hydrogen in the hydrogen storage tank 2 is preheated, and the dicyclopentadiene gas produced is mixed with the preheated hydrogen at a molar ratio of 1:40 in the first static mixer 4, and the mixed gas is pumped through the first metering pump 15 Into the first reactor 5, the feeding speed of the first metering pump 15 is controlled to be 1.5mL / min, and cracking is carried out under the protection of excess hydrogen, the cracking temperature of the first reactor 5 is controlled to be 310 ° C, and the reaction time is 8s. The pressure is 15MPa. The mixture of products and reactants is drawn from the top of the fir...

Embodiment 3

[0038] Adjust the temperature control systems, instruments and valves of the pilot plant in advance, and conduct leak detection. Add the dicyclopentadiene in the dicyclopentadiene storage tank 1 to the first heater 3 for preheating with a metering pump. The heating temperature is 210° C., and the vapor pressure is controlled at 20 MPa by adjusting the temperature. The hydrogen in the hydrogen storage tank 2 is preheated, and the dicyclopentadiene gas produced is mixed with the preheated hydrogen at a molar ratio of 1:50 in the first static mixer 4, and the mixed gas is pumped through the first metering pump 15 Into the first reactor 5, control the feed flow rate of the first metering pump 15 to 2mL / min, carry out cracking under the protection of excess hydrogen, control the cracking temperature to be 320°C, the reaction time is 6s, and the pressure is 20MPa. The mixture of products and reactants is drawn from the top of the first reactor 5, and enters the rectification equipme...

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Abstract

The invention relates to a production technique of norbornene, which uses dicyclopentadiene and ethylene as raw materials and hydrogen gas as a shielding gas for cracking dicyclopentadiene. The production technique comprises the following steps: mixing heated hydrogen gas and dicyclopentadiene steam in a mole ratio of 30:1-50:1, sending into a reactor to carry out cracking in a reactor, rectifying to obtain high-purity cyclopentadiene, mixing ethylene and cyclopentadiene in a mole ratio of 4.4:1-5.5:1, and synthesizing the norbornene in the reactor. The production technique is simple, can carry out continuous production, relieves the carbonization problem in the dicyclopentadiene cracking process, and prevents water vapor from generation. The reactants are cheap and accessible, the hydrogen gas is used as the diluent gas, the hydrogen gas and ethylene can be reutilized in the reaction, the materials are mixed sufficiently in the reaction process, and the obtained norbornene has higher purity.

Description

technical field [0001] The invention relates to a norbornene production process, in particular to a process for producing norbornene by using cyclopentadiene and ethylene as raw materials and using hydrogen as a cracking dicyclopentadiene protective gas, belonging to the technical field of compound synthesis. Background technique [0002] Norbornene (NB), the chemical name is bicyclo[2.2.1]-2-heptene, is a white transparent crystal at room temperature, with a melting point of 44-46°C and a boiling point of 96°C, and is easy to sublime. The structural formula is shown in the figure below: [0003] [0004] Norbornene contains double bonds and can be polymerized to form polynorbornene derivatives. Norbornene can be polymerized in three different ways, as shown in the diagram below: [0005] [0006] Any polymerization method can form a polymer with unique structure and properties. Through polymer processing technology, it can be processed into elastomer materials for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/50C07C4/04C07C13/15C07C13/42
CPCY02P20/10
Inventor 范慧军张文泉朱萌施英潘萍尤卫民
Owner WUXI ACRYL TECH
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