Daikin Industries, Ltd.

Hitoshi Motoyama

Kazuhiro Takahashi

Meiten Koh

Daisuke Karube

Takehiro Chaki

Aoi Nakazono

Michiru Kagawa

Masayuki Kishimoto

Toru Yoshizawa

Michinobu Koizumi

Kenji Otoi

Nobuo Fukita

Shoji Itakura

Kayui Go

The present disclosure provides a method for processing a fluorine-containing aqueous solution. The method comprises a reaction step for mixing in a vertical direction the fluorine-containing aqueous solution and a disiloxane compound represented by a general formula RRRSiOSiRRR, wherein R, R, R, R, Rand Rare selected independently from each other from a group consisting of a phenyl group and an alkyl group comprising from 1 to 20 carbon atoms and hydrogen, to react a fluorine ion in the fluorine-containing aqueous solution with the disiloxane compound, obtaining a first reaction liquid containing a monofluorosilane compound represented by general formulas RRRSiF and RRRSiF.

Method for processing fluorine-containing aqueous solution

The present invention provides a process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of producing 2-chloro-3,3,3-trifluoropropene by reacting anhydrous hydrogen fluoride with a specific chlorine-containing compound in a gas phase in the presence of a fluorination catalyst while heating; and producing 2,3,3,3-tetrafluoropropene by reacting 2-chloro-3,3,3-trifluoropropene with anhydrous hydrogen fluoride in a gas phase in the presence of a fluorination catalyst while heating, the step of producing 2-chloro-3,3,3-trifluoropropene being performed after the step of producing 2,3,3,3-tetrafluoropropene. According to the process, 2,3,3,3-tetrafluoropropene can be produced with reduced energy and equipment costs in an economically advantageous manner.

Process for producing 2,3,3,3-tetrafluoropropene

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Settsu, Japan

Hitoshi Motoyama