Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hexafluoroepoxypropane preparation process

A technology of hexafluoropropylene oxide and hexafluoropropylene is applied in the field of preparation of fluorine-containing intermediates, and can solve the problems of long service cycle and the like

Active Publication Date: 2007-05-23
SHANGHAI 3F NEW MATERIAL TECH CO LTD
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention aims to provide a new reaction medium with excellent performance for the preparation of hexafluoropropylene oxide, which has high reaction conversion rate, high hexafluoropropylene oxide selectivity and can react quickly, and it is inert Yes, it does not corrode the reactor, has a long service life, and is a commercialized product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 10kg of fluorocarbon solvent (Shanghai Sanaifu New Materials Co., Ltd., FF31, α-perfluoro-n-butyloxaperfluorocyclopentane and α-perfluoron-propyloxaperfluorocyclopentane) into a 15L reactor Cyclohexane weight ratio is 1: 1.0), after throwing in 1.8kg of hexafluoropropylene at one time, start to heat up, when the temperature rises to the reaction temperature, start to feed oxygen. After passing oxygen for 3 hours, keep warm for one hour. After washing with water, washing with alkali and drying, the measured conversion rate of hexafluoropropylene is 99%, and the selectivity of hexafluoropropylene oxide is 55%.

Embodiment 2

[0036] Add 10kg of fluorocarbon solvent (α-perfluoro-n-butyl oxa-perfluorocyclopentane and α-perfluoro-n-propyl oxa-perfluorocyclohexane weight ratio is 1: 1.2) in a 15L reactor, After dropping 2.5kg of hexafluoropropylene at one time, start to heat up, and when the temperature reaches the reaction temperature, start to feed oxygen. After passing oxygen for 3 hours, keep warm for one hour. Finally, the conversion rate of hexafluoropropylene was 95%, and the selectivity of hexafluoropropylene oxide was 65%.

Embodiment 3

[0038] In a 15L reactor, add 10kg of fluorocarbon solvent (α-perfluoro-n-butyl oxa-perfluorocyclopentane and α-perfluoro-n-propyl oxa-perfluorocyclohexane weight ratio is 1: 1.1), After dropping 1.7kg of hexafluoropropylene at one time, start to heat up, and when the temperature reaches the reaction temperature, start to feed oxygen. After passing oxygen for 2 hours, keep warm for one hour. Finally, the conversion rate of hexafluoropropylene was 85%, and the selectivity of hexafluoropropylene oxide was 80%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses a preparation method for hexafluoropropylene oxide (HEP). The said method includes: a) providing solution for HFP in the reaction, and b) heating and charging oxygen, and preparing hexafluoropropylene oxide through molecular oxygen liquid-phase oxidation, wherein the referred reaction medium is selected from alpha-perfluoro-n-butyl-oxa-perfluorocyclopentane, alpha-perfluoro-n-propyl-oxa-perfluorocyclohexane or fluorocarbon cyclic ether mixture. The conversion rate of products can be improved and the reaction time can be shortened by this method.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-containing intermediate (hexafluoropropylene oxide). Background technique [0002] Hexafluoropropylene oxide (referred to as HFPO) is an important chemical intermediate. The existing production technology of hexafluoropropylene oxide is prepared by oxidation of hexafluoropropylene as raw material with different oxidants. [0003] For example, US Patent No. 3,358,003 discloses a method for preparing hexafluoropropylene oxide by using hydrogen peroxide to oxidize hexafluoropropylene; generally, hydrogen peroxide and hexafluoropropylene are reacted in liquid phase at low temperature in a reaction medium to prepare hexafluoropropylene oxide. [0004] US Patent No. 4,902,810 discloses a method for preparing hexafluoropropylene oxide using sodium hypochlorite as an oxidizing agent: at low temperature, ammonium salt is used as a phase transfer catalyst to prepare hexafluoropropylene oxide by two-phas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07D303/48C07D301/06
Inventor 粟小理江建安邢付雷朱华军李作铭
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com