发明授权
- 专利标题: Method for preparing a trifluoromethanesulfinic acid salt
- 专利标题(中): 三氟甲磺酸盐的制备方法
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申请号: US12745196申请日: 2008-11-25
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公开(公告)号: US08471059B2公开(公告)日: 2013-06-25
- 发明人: Vincent Schanen , Olivier Buisine , François Metz , Bernard Besson
- 申请人: Vincent Schanen , Olivier Buisine , François Metz , Bernard Besson
- 申请人地址: FR Aubervilliers
- 专利权人: Rhodia Operations
- 当前专利权人: Rhodia Operations
- 当前专利权人地址: FR Aubervilliers
- 代理机构: Hunton & Williams, LLP
- 国际申请: PCT/EP2008/066162 WO 20081125
- 国际公布: WO2009/068534 WO 20090604
- 主分类号: C07C313/04
- IPC分类号: C07C313/04
摘要:
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.
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