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A kind of method for preparing perfluoro-2,3-epoxy-2-methylpentane

A technology of methylpentane and epoxy, which is applied in the field of preparing perfluoro-2,3-epoxy-2-methylpentane, can solve the problems of low formula conversion rate and unstable reaction yield, and achieve the goal of reaction High yield and the effect of reducing the amount of waste liquid generated

Inactive Publication Date: 2019-08-13
SHANGHAI 3F NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent also uses 6 times the sodium hypochlorite aqueous solution and solvent of the product, resulting in a large amount of waste liquid, different catalysts lead to unstable reaction yield, and the conversion rate of some formulations is lower than 70%.

Method used

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  • A kind of method for preparing perfluoro-2,3-epoxy-2-methylpentane
  • A kind of method for preparing perfluoro-2,3-epoxy-2-methylpentane

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Add 300ml of perfluoro-2-n-propyl-cyclopentyl ether, 2g of potassium permanganate, and add perfluoro-2-methyl-2-pentene (99% )300g, control the reaction temperature at 80°C, the reaction pressure is 0.6MPa, feed oxygen, and react for 6 hours in total. 270.5 g of alkanes, the molar yield is 85.6%.

Embodiment 2

[0041] Add 300ml of perfluoromethylcyclohexane, 3g peroxyphosphotungstate in 1000mL airtight reaction kettle equipped with mechanical stirring, add perfluoro-2-methyl-2-pentene (99%) 300g, Control the reaction temperature at 90°C, the reaction pressure at 0.7MPa, and feed oxygen for a total of 6 hours of reaction. After the reaction, 293.6g of perfluoro-2,3-epoxy-2-methylpentane with a purity of 99% was obtained by separation , the molar yield was 92.9%.

Embodiment 3

[0043] Add 300ml of a 1:1 mixture of perfluoro-2-n-propyl-cyclopentyl ether and perfluoromethylcyclohexane in a 1000mL closed reaction kettle equipped with mechanical stirring, 4g peroxymolybdate, add Perfluoro-2-methyl-2-pentene (99%) 300g, control the reaction temperature 100 ℃, the reaction pressure is 0.8MPa, feed oxygen, react for 5 hours in total, after the reaction is over, obtain 99% purity through separation 281.9 g of perfluoro-2,3-epoxy-2-methylpentane, the molar yield was 89.2%.

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Abstract

The invention discloses a method for preparing perfluoro-2,3-epoxy-2-methylpentane. The method comprises the following steps: a) providing a mixed solution of perfluoro-2-methyl-2-pentene, an oxidation catalyst and a reaction medium; b) controlling the reaction temperature and the pressure, inflating oxygen, and synthesizing by a molecular oxygen oxidation method to obtain the perfluoro-2,3-epoxy-2-methylpentane. By the method, the reaction yield is high; the reaction medium can be repeated for many times, so that the waste liquid production is greatly reduced; the way is environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing perfluoro-2,3-epoxy-2-methylpentane, which belongs to the technical field of perfluoro organic compounds. Background technique [0002] Perfluoropentylene oxide is an important fluorine-containing chemical, which can be used as a fire extinguishing agent, cleaning agent, solvent, etc. As an intermediate, perfluoropentylene oxide can be used to synthesize perfluorohexanone and fluorine-containing ether solvents, etc., and has broad production applications and market prospects. [0003] Various synthesis methods of perfluoropentene oxide have been proposed in the prior art, mainly the oxidation synthesis of perfluoro-4-methyl-2-pentene or perfluoro-2-methyl-2-pentene. For example, Chinese patent CN 102992986 proposes to use hexafluoropropylene dimer mixture, perfluoro-4-methyl-2-pentene or perfluoro-2-methyl-2-pentene as raw materials, by adding perfluoro-2-methyl Oxyl-2-pentene is oxidized to perfluoro-2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/08C07D301/06
CPCC07D301/06C07D303/08
Inventor 陈焱锋张智勇吴君毅
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
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