Daikin Industries, Ltd.

Yasuhide Senba

Meiten Koh

Kazunori Morimoto

Aoi Nakazono

Hideki Nakaya

Kazuyoshi Ichihara

Toru Yoshizawa

Michiru Kagawa

Hitoshi Motoyama

Mai Hirai

Mikio Nakagoshi

The present invention provides a novel method for producing hexafluoropropylene oxide, which can attain a high HFPO selectivity without using a phase transfer catalyst. Hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous solution of an oxidizing agent are introduced into a small space, thereby bringing into contact with each other and reacting hexafluoropropylene with the oxidizing agent to obtain hexafluoropropylene oxide (HFPO).

Method for producing hexafluoropropylene oxide

The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CHF(wherein n, a and b are integers which satisfy: n=3 to 8, 0&#x2266;a&#x2266;2n+1, and 1&#x2266;b&#x2266;2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.

Method for separating hexafluoropropylene oxide from hexafluoropropylene

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Osaka, Japan

Yasuhide Senba