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Method for synthesizing hanging type tetrahydrodicyclopentadiene

A technology for hanging tetrahydrodicyclopentadiene and tetrahydrodicyclopentadiene is applied in the field of synthesizing hanging tetrahydrodicyclopentadiene, and can solve the problems of harsh reaction conditions, limited industrial application, low selectivity and the like, To achieve the effect of high selectivity of target products, simple and easy process flow, and high conversion rate of raw materials

Active Publication Date: 2020-11-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The third object of the present invention is to overcome the problems of harsh reaction conditions, limited industrial application, low selectivity and complex process in the prior art for the preparation of hanging tetrahydrodicyclopentadiene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Introduce a methylcyclohexane solution with a bridged tetrahydrodicyclopentadiene mass percentage of 40% into a fixed-bed reactor equipped with HY molecular sieve 1, at a reaction temperature of 150°C and a mass space velocity of 2h -1 1. The reaction is carried out under the condition that the pressure is 2 MPa, and the liquid phase product is taken out after natural cooling, and its composition is analyzed by gas chromatography. The results are shown in Table 1.

Embodiment 2

[0042] Introduce a methylcyclohexane solution with a bridged tetrahydrodicyclopentadiene mass percentage of 50% into a fixed-bed reactor equipped with HY molecular sieve 1, at a reaction temperature of 150°C and a mass space velocity of 4h -1 1. The reaction is carried out under the condition of 0.5MPa pressure, and the liquid phase product is taken out after natural cooling, and its composition is analyzed by gas chromatography. The results are shown in Table 1.

Embodiment 3

[0044] Introduce a methylcyclohexane solution with a bridged tetrahydrodicyclopentadiene mass percentage of 60% into a fixed-bed reactor equipped with HY molecular sieve 1, at a reaction temperature of 180°C and a mass space velocity of 6h -1 1. The reaction is carried out under the condition of 2.5MPa pressure, and the liquid phase product is taken out after natural cooling, and its composition is analyzed by gas chromatography. The results are shown in Table 1.

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Abstract

The invention relates to the field of synthesis, and discloses a method for synthesizing hanging type tetrahydrodicyclopentadiene. The method comprises the following steps: forming a homogeneous solution from bridge tetrahydrodicyclopentadiene and a solvent, and contacting the obtained homogeneous solution with an isomerization catalyst to perform an isomerization reaction, wherein the isomerization catalyst contains an original molecular sieve and / or a modified molecular sieve, the original molecular sieve is at least one selected from ZSM12, ZSM22, beta molecular sieve, MCM49 and Y molecularsieve, and the modified molecular sieve is a product obtained by modifying the original molecular sieve. According to the method, the effects of high raw material conversion rate and high target product selectivity are achieved under a mild reaction condition, meanwhile, the problem that a traditional anhydrous aluminum chloride catalyst product is difficult to separate from a catalyst is solved,and industrial production is easy to achieve.

Description

technical field [0001] The invention relates to the field of synthesis, in particular to a method for synthesizing pendent tetrahydrodicyclopentadiene. Background technique [0002] Hanging tetrahydrodicyclopentadiene is a high-density hydrocarbon fuel with high volumetric calorific value (39.6MJ / L) and good low-temperature performance (freezing point<-79°C). It can be used directly as a high-density hydrocarbon fuel. It can also be used as a solvent or additive mixed with other high-density hydrocarbon fuels. It has been widely used as a propellant for missiles, rockets, torpedoes and other aircraft. It is the most widely used high-density hydrocarbon fuel with the best comprehensive performance so far. [0003] Hanging tetrahydrodicyclopentadiene is usually first hydrogenated from dicyclopentadiene (DCPD) to obtain bridged tetrahydrodicyclopentadiene (endo-THDCPD), and then synthesized by isomerization of acidic catalyst. Hydrogen dicyclopentadiene (exo-THDCPD). [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/61C07C5/22
CPCC07C5/222C07C2603/68C07C13/61
Inventor 王文科赵杰邢恩会伏朝林舒兴田陶志平罗一斌董行周顺利
Owner CHINA PETROLEUM & CHEM CORP