Method for preparing high-purity perfluoropropane

An octafluoropropane, high-purity technology, applied in the field of preparation of octafluoropropane, can solve the problems of cumbersome process, increased raw material cost and maintenance cost, unfavorable large-scale production, etc., achieves good selectivity, promotes addition reaction, The effect of less content of by-products

Active Publication Date: 2017-08-29
FOSHAN HUATE GASES +1
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is not a continuous preparation process, and the process is cumbersome; at the same time, due to the continuous cycle conversion between cobalt trifluoride and cobalt difluoride in the production process, the internal molecular structure of the fluorinating agent is constantly changing, making the fluorine in the reactor The pulverization of the chemical agent bed affects the continuity of the process, which greatly increases the raw material cost and maintenance cost of production
In addition, the effective utilization rate of cobalt trifluoride as a fluorinating agent is only 16.3%, which is not conducive to large-scale production

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high-purity perfluoropropane
  • Method for preparing high-purity perfluoropropane
  • Method for preparing high-purity perfluoropropane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The technical solutions of the present invention will be further described below through specific embodiments.

[0045] A method for preparing high-purity octafluoropropane, comprising the steps of:

[0046] In the reactor, set the reaction temperature at 50-250°C, use cobalt trifluoride as the catalyst, hexafluoropropylene and fluorine as the reaction gas, and react to prepare octafluoropropane;

[0047] The molar ratio of the hexafluoropropylene to the fluorine gas is 1:2-6.

[0048] In order to continuously produce the purity of high-purity octafluoropropane and reduce production costs, this application uses hexafluoropropylene as a raw material, and under the action of a Co-based catalyst (i.e. activated cobalt trifluoride), it is added to fluorine gas The reaction produces octafluoropropane. The reaction temperature should not be too high, otherwise chain scission and polymerization will occur. This application controls the reaction temperature at 50-250°C.

[0...

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

The invention relates to a method for preparing high-purity perfluoropropane. The method comprises the following steps: in a reactor, the reaction temperature is set to 50-250 DEG C, cobaltic fluoride is taken as a catalyst, hexafluoropropene and fluorine gas are taken as reaction gas, perfluoropropane is prepared after the reaction, and the mole ratio of hexafluoropropene to fluorine gas is 1:2-6. In the method, cobaltic fluoride is taken as the catalyst, continuous reaction is realized, an addition reaction of hexafluoropropene and fluorine gas is promoted, conversion rate of hexafluoropropene is almost 100%, and perfluoropropane yield can reach 90% and above, the reaction selectivity is good, and the by-product content is little. The high-purity perfluoropropane is prepared after subsequent purifying processing of the crude product, and the method has the advantages of low cost, high efficiency and industrial production.

Description

technical field [0001] The invention relates to a preparation method of octafluoropropane, in particular to a method for preparing high-purity octafluoropropane by direct reaction of hexafluoropropylene and fluorine gas under the action of a cobalt-based catalyst. Background technique [0002] Due to its good chemical stability and thermal stability, octafluoropropane is a widely used fluorocarbon gas, which is often used as etching gas, cleaning gas or dielectric gas in the semiconductor industry; and because of its high physiological Drug resistance, it is mainly used as filler after vitreoretinal surgery and ultrasound contrast agent in clinical medicine; in addition, it is also used as one of the components of refrigerant mixture in other industries. At present, new uses of octafluoropropane are still being developed at home and abroad. [0003] In the prior art, there are mainly the following five methods for preparing octafluoropropane. [0004] The first is the dire...

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): C07C17/04C07C19/08
CPCC07C17/04C07C19/08
Inventor 陈艳珊廖恒易裴友宏何西
Owner FOSHAN HUATE GASES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap