Method for preparing hexafluoropropylene oxide

A technology of hexafluoropropylene oxide and hexafluoropropylene, which is applied in the field of molecular oxygen liquid phase oxidation to prepare hexafluoropropylene oxide, can solve the problems of low conversion rate and the failure of halogenated hydrocarbons to meet environmental protection requirements, and achieve high efficiency Improvement, fast oxidation reaction rate, high conversion rate and high product selectivity

Inactive Publication Date: 2015-05-27
SHANXI FUNUOOU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1955169 reported the report of using ether compound and halogen-containing hydrocarbon compound mixture as solvent to carry out molecular oxygen oxidation to prepare hexafluoropropylene oxide, but the conversion rate of this reaction is low, and the halogen-containing hydrocarbon compound does not meet the environmental protection requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 110 kg of perfluorodibutyl ether into a 120L reactor, and add 20 kg of HFP at one time. Control the reaction temperature at about 110°C, and the reaction pressure at about 1.1 Mpa. After feeding oxygen for 120 minutes, keep it warm for 60 minutes. The product was collected to obtain 16.2 kg HFPO and 2.4 kg unreacted HFP and a small amount of other mixtures. Analysis and calculation showed that the conversion rate of HFP was 88%, and the selectivity of HFPO was 83%.

Embodiment 2

[0020] Add 115 kg of perfluorodibutyl ether into a 120L reactor, add 30 kg of HFP at one time, control the reaction temperature to about 120°C, and the reaction pressure to about 1.2Mpa. After feeding oxygen for 150 minutes, keep it warm for 60 minutes . The product was collected to obtain 24.4 kg HFPO and 2.1 kg unreacted HFP and a small amount of other mixtures. Analysis and calculation showed that the conversion rate of HFP was 93%, and the selectivity of HFPO was 79%.

Embodiment 3

[0022] Add 112 kg of perfluorodipentyl ether into a 120L reactor, and add 22 kg of HFP at one time, control the reaction temperature to about 95°C, and the reaction pressure to about 1.0 Mpa. After feeding oxygen for 120 minutes, keep it warm for 60 minutes . The product was collected to obtain 17.4 kg HFPO, 3.3 kg unreacted HFP and a small amount of other mixtures. Analysis and calculation showed that the conversion rate of HFP was 85%, and the selectivity of HFPO was 84%.

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Abstract

The invention discloses a method for preparing hexafluoropropylene oxide through molecular oxygen liquid-phase oxidation. A reaction solvent adopted for reaction is perfluorinated dibutyl ether or perfluorinated diamyl ether, and because the reaction solvent has excellent dissolving property on hexafluoropropylene and oxygen and has good chemical stability and heat stability, the method disclosed by the invention has the characteristics of high reaction speed, high transformation rate and selectivity, environmental friendliness and the like and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of fluorine-containing fine chemicals, in particular to a method for preparing hexafluoropropylene oxide by molecular oxygen liquid phase oxidation. Background technique [0002] Hexafluoropropylene oxide (HFPO for short) is the raw material for the production of important organic fluorine products such as hexafluoroacetone and hexafluoroisopropanol. It can also be used to synthesize a variety of fluorine-containing vinyl ether monomers containing special groups. These fluorine-containing vinyl ether monomers are indispensable intermediates for the synthesis and modification of a series of high-end fluororesins, fluororubbers and other products. Therefore, hexafluoropropylene oxide is one of the important raw materials for the organic fluorine industry. [0003] Existing hexafluoropropylene oxide is prepared from hexafluoropropylene (referred to as HFP) through different oxidation processes. USP3258003 and JP6...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/48C07D301/06
CPCC07D303/48C07D301/06
Inventor 耿志光邢付雷车延超
Owner SHANXI FUNUOOU NEW MATERIAL TECH CO LTD
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