Title:
トリフルオロメタンスルフィン酸塩の調製方法
Document Type and Number:
Japanese Patent JP5501243
Kind Code:
B2
Abstract:
The present invention relates to a method for preparing a salt of trifluoromethanesulphinic acid termed "triflinic acid". More specifically, the invention relates to a method for preparing a highly pure triflinic acid salt. The method of the invention for preparing a highly pure triflinic acid salt, starting from an aqueous mixture comprising the latter combined with a trifluoroacetic acid salt and saline impurities resulting from the method for preparing same, is characterized in that said mixture is subjected to the following operations: -first controlled acidification such that the trifluoroacetic acid salt is essentially released in the acid form thereof, the majority of the triflinic acid remaining in a salified form, -optional separation of the salts originating from the acid having been used for the acidification and recovery of an aqueous phase, -separation of the trifluoroacetic acid from the separated aqueous phase comprising the alkaline salt of triflinic acid, trifluoroacetic acid, triflinic acid and the excess strong acid, therefore resulting in an aqueous phase depleted of trifluoroacetic acid but comprising the alkaline salt of triflinic acid, -recovery of the alkaline salt of triflinic acid from the aqueous phase.
Inventors:
Cyanan, Bangsan
Olivier, Bougain
Metz, Bernard
Betsson, bernard
Olivier, Bougain
Metz, Bernard
Betsson, bernard
Application Number:
JP2010535358A
Publication Date:
May 21, 2014
Filing Date:
November 25, 2008
Export Citation:
Assignee:
Rodia Opera
International Classes:
C07C313/04; B01D11/04
Domestic Patent References:
| JP8319244A | ||||
| JP3056455A | ||||
| JP54095515A | ||||
| JP2005194227A | ||||
| JP2001316353A |
Attorney, Agent or Firm:
Kawaguchi International Patent Office