Method for preparing hexafluoroacetone by taking perfluoropropylene oxide as raw material

Abstract

The invention discloses a method for preparing hexafluoroacetone by taking perfluoropropylene oxide as a raw material. The method comprises the following steps: adding the perfluoropropylene oxide, acatalyst and water into a reaction kettle according to a weight ratio of 1: (0.1-0.5): (1-5), carrying out isomerization reaction at 10-80 DEG C for 1-5 hours, and distilling and purifying to obtain the hexafluoroacetone, wherein by condensing substituted phenol and Merrifield resin, and mixing and compounding with a carrier, the catalyst is obtained. According to the method, the Merrifield resinloaded substituted phenol is used as the catalyst for the first time, and is applied to the method for preparing the hexafluoroacetone by taking the perfluoropropylene oxide as the raw material, so that a new preparation thought is provided, and particularly for fluorine chemical enterprises, self-produced intermediate products can be fully utilized. The raw materials of the catalyst are easy to obtain, the cost is low, and the economic benefit is good; the catalyst is simple in preparation process and mild in preparation condition. The yield of the hexafluoroacetone reaches 95% or above, theoperation is safe, and the catalyst can be continuously used.

Description

technical field [0001] The invention relates to a method for preparing hexafluoroacetone by using perfluoropropylene oxide as a raw material, belonging to the technical field of chemical industry. Background technique [0002] Hexafluoroacetone (HFA) is a widely used fluorine-containing fine chemical, and is also an important organic fluorine industrial raw material. Companies such as DuPont of the United States and Daikin of Japan use hexafluoroacetone as raw materials to develop and manufacture many valuable fluorine-containing intermediates and military chemical products. Man-made fiber polyester, polyether spinning, chitin, gel chromatography, fluorine-containing solvents, high and low temperature resistance, radiation resistance, transparent material polyimide monomer 6DFA used in the aerospace industry, optical glass, microelectronic circuit boards Surface protection layer, fluororesin monomer, high temperature resistance, corrosion resistance and high self-extinguish...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new method for preparing hexafluoroacetone using perfluoropropylene oxide as a raw material, so as to provide a new preparation idea and solve the problems of short service life of the catalyst