Preparation method of perfluoro-2-methyl-3-pentanone

Abstract

The invention discloses a preparation method of perfluoro-2-methyl-3-pentanone. In the presence of a fluoride salt and an ether compound, perfluoro-2, 3-epoxy-2-methylpentane undergoes a catalytic rearrangement reaction to generate perfluoro-2-methyl-3-pentanone. The method has the advantages of mild reaction conditions, fast reaction rate, high reaction selectivity and high yield, etc. The prepared perfluoro-2-methyl-3-pentanone can be used as a cleaning agent, a solvent and a fire extinguishing agent.

Description

technical field [0001] The invention relates to a preparation method of perfluoro-2-methyl-3-pentanone. Background technique [0002] Perfluoro-2-methyl-3-pentanone is an important compound that can be used as a cleaning agent, solvent and fire extinguishing agent, with an ozone depletion value (ODP) of 0 and a global warming potential (GWP) of 1, which is A new generation of ODS substitute, it can be used as a substitute for Halon 1301 in fire extinguishing agent. There are two main methods for preparing perfluoro-2-methyl-3-pentanone, oxidative rearrangement of hexafluoropropylene dimer and addition of perfluoropropionyl fluoride to hexafluoropropylene. 3M Innovation Company US Patent US6630075 reports a method for preparing perfluoro-2-methyl-3-pentanone by addition reaction of perfluoropropionyl fluoride and hexafluoropropylene in a pressure vessel. Since this method needs to be operated under pressure, and perfluoropropionyl fluoride is highly corrosive, it has hig...

AI Technical Summary

Problems solved by technology

Most of the reaction conditions of this method are mild, but when antimony pentafluoride is used as a catalyst, the reaction temperature is as...