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Method for co-production preparation of perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene

A technology of methyl and pentene, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, chemical recovery, etc., can solve problems such as unfavorable industrial amplification, achieve high conversion rate and selectivity, high efficiency, and low loss

Active Publication Date: 2014-05-14
SINOCHEM LANTIAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this device can stir the materials well, it is not conducive to industrial scale-up.

Method used

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  • Method for co-production preparation of perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene
  • Method for co-production preparation of perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene
  • Method for co-production preparation of perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this example, CsF is used as a catalyst and acetonitrile is used as a solvent to carry out liquid phase oligomerization of hexafluoropropylene to prepare perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene.

[0032] Add 600kg of acetonitrile and 10kg of CsF through the feeding port into 2m 3 In the high-pressure reactor, the reactor is then sealed, vacuumed several times, and replaced with nitrogen to make the oxygen content in the reactor less than 20ppm. Then turn on the stirring, raise the temperature to 50° C., continuously and slowly feed 1000 kg of raw material hexafluoropropylene, and control the reaction pressure at about 0.5 MPa. The reaction speed depends on the speed of feeding hexafluoropropylene, and the speed of feeding hexafluoropropylene should not be too fast, otherwise the reaction temperature is difficult to control. After the raw materials are passed through, keep the inner temperature of the reactor at 50°C until the pressure of the re...

Embodiment 2

[0034] In this example, NaF is used as a catalyst and diethylene glycol diethyl ether is used as a solvent to carry out liquid phase oligomerization of hexafluoropropylene to prepare perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene .

[0035] Add 600kg of diethylene glycol diethyl ether and 8kg of NaF through the feed port into 2m 3 In the high-pressure reactor, the reactor is then sealed, vacuumed several times, and replaced with nitrogen to make the oxygen content in the reactor less than 20ppm. Then turn on the stirring, raise the temperature to 50° C., continuously and slowly feed 1000 kg of raw material hexafluoropropylene, and control the reaction pressure at about 0.5 MPa. The reaction speed depends on the speed of feeding hexafluoropropylene, and the speed of feeding hexafluoropropylene should not be too fast, otherwise the reaction temperature is difficult to control. After the raw materials are passed through, keep the inner temperature of the reactor ...

Embodiment 3

[0037] In this example, CsF is used as a catalyst and diethylene glycol dimethyl ether is used as a solvent to carry out liquid phase oligomerization of hexafluoropropylene to prepare perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene alkene.

[0038] Add 600kg of diethylene glycol dimethyl ether and 8kg of CsF through the feeding port into 2m 3In the high-pressure reactor, the reactor is then sealed, vacuumed several times, and replaced with nitrogen to make the oxygen content in the reactor less than 20ppm. Then turn on the stirring, raise the temperature to 50° C., continuously and slowly feed 1000 kg of raw material hexafluoropropylene, and control the reaction pressure at about 0.5 MPa. The reaction speed depends on the speed of feeding hexafluoropropylene, and the speed of feeding hexafluoropropylene should not be too fast, otherwise the reaction temperature is difficult to control. After the raw materials are passed through, keep the inner temperature of th...

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Abstract

The present invention discloses a method for co-production preparation of perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene. The method comprises a cyclic applying process, and has characteristics of high conversion rate, high selectivity, mild and controlled reaction condition, cyclic applying of the catalyst and the solvent in the reaction kettle, simple reaction product separation and the like.

Description

technical field [0001] The present invention relates to an oligomerization reaction, in particular to a method for preparing perfluoro-2-methyl-2-pentene and perfluoro-4-methyl-2-pentene by oligomerization of hexafluoropropylene. Background technique [0002] Oligomerization refers to a certain olefin monomer (C 2 -C 14 ) Under the action of a catalyst, the reaction process in which one or more structural units are repeatedly connected to form a compound. Since 1935, this catalytic reaction has been widely used in chemical fields such as petroleum refining. The significant difference between the oligomerization reaction and the general polymerization reaction is that the molecular weight of the product of the polymerization reaction is a large multimer, while the oligomerization reaction mainly produces two, three, four, and five polymers of olefin monomers. [0003] The dimer and trimer obtained by the oligomerization of hexafluoropropylene are very useful chemical raw m...

Claims

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Application Information

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IPC IPC(8): C07C21/18C07C17/281
CPCC07C17/281C07C21/18Y02P20/584
Inventor 刘武灿陈慧闯石能富戴成洪陈先进
Owner SINOCHEM LANTIAN
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