Title:
PREPARATION METHOD FOR PERFLUOROALKANE SULFINATE
Document Type and Number:
WIPO Patent Application WO/2011/108622
Kind Code:
A1
Abstract:
Disclosed is a preparation method for obtaining an alkali metal perfluorosulfinate by reacting a perfluoroalkane sulfinyl halide with a sulfur-containing reducing agent in the presence of water, wherein
mineral salts, which are an impurity in the solution, are precipitated and removed by concentrating a reaction mixture comprising an alkali metal sulfinate obtained following said reaction to a specified concentration, and the filtrate after the removal of mineral salts is concentrated and dried, and the like, thereby obtaining the target alkali metal perfluorosulfinate at a high purity and excellent operability. In addition, organic solvents for extraction are unnecessary, and waste can be significantly reduced.
Inventors:
KASHIWABA TAKASHI
NANMYO TSUTOMU
TAKENAKA YOICHI
NANMYO TSUTOMU
TAKENAKA YOICHI
Application Number:
PCT/JP2011/054844
Publication Date:
September 09, 2011
Filing Date:
March 03, 2011
Export Citation:
Assignee:
CENTRAL GLASS CO LTD (JP)
KASHIWABA TAKASHI
NANMYO TSUTOMU
TAKENAKA YOICHI
KASHIWABA TAKASHI
NANMYO TSUTOMU
TAKENAKA YOICHI
International Classes:
C07C313/02
Domestic Patent References:
| WO2010013687A1 | 2010-02-04 |
Foreign References:
| JP2001316353A | 2001-11-13 | |||
| JP2005247782A | 2005-09-15 |
Other References:
See also references of EP 2543663A4
Attorney, Agent or Firm:
HASHIMOTO, Takeshi et al. (JP)
Hashimoto 剛 (JP)
Hashimoto 剛 (JP)
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Claims: