Asahi Glass Company, Limited

Akihiro Wada

Seisaku Kumai

Hidekazu Okamoto

Shinsuke Morikawa

Nobuyuki Yamagishi

Toshihiko Toma

Toshihiko Tohma

The present invention has an object to provide a method for purifying a fluorinated hydroxyl compound of the formula 1 safely in a high yield under industrially practical conditions. Namely, a mixture containing a fluorinated hydroxyl compound of R&#x2014;CRR&#x2014;OH (Formula 1, wherein Ris a Cpolyfluoroalkyl group, and each of Rand Ris a hydrogen atom or a Calkyl group) such as 2,2,3,3-tetrafluoropropanol, and a compound having an unshared electron pair, is distilled by heating in the presence of a solid acid catalyst such as a cation exchange resin catalyst, or by adding a proton source such as water.

Method for purifying a fluorinated hydroxyl compound

A process for producing a fluoroalkanol which can easily be industrially practiced with high selectivity, is provided. CHRROH, a radical initiator and CF&#x2550;CFRare continuously supplied and reacted at from 105 to 135&#xb0; C., and H&#x2014;(RCFCF)&#x2014;CRR&#x2014;OH formed, is continuously discharged. Here, each of Rand Ris a hydrogen atom or a Calkyl group, Ris a fluorine atom or a Cpolyfluoroalkyl group, and n is an integer of from 1 to 4.

Process for producing a fluoroalkanol

A process for producing chlorofluorobenzenes, which comprises reacting fluorine-containing nitrobenzenes of the following formula (1) with chlorine gas to obtain chlorofluorobenzenes of the following formula (2): ##STR1## wherein n and m are integers satisfying 1.ltoreq.n.ltoreq.3, 0.ltoreq.m.ltoreq.2 and 1.ltoreq.n+m.ltoreq.3.

Process for producing chlorofluorobenzenes

A method for brominating a perfluoroalkyl iodide or a perfluoroalkylene diiodide, which comprises reacting a perfluoroalkyl iodide or a perfluoroalkylene diiodide with a brominating agent in a gas phase to obtain a perfluoroalkyl bromide or a perfluoroalkylene dibromide.

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Ichihara, Japan

Akihiro Wada