公开(公告)号：DE59804199D1

公开(公告)日：2002-06-27

申请号：DE59804199

申请日：1998-02-09

Applicant: BASF AG

Inventor： MERKLE RUPERT ,  EVA R ,  FRANKE DIRK ,  JONES A ,  MATTMANN WOLFGANG ,  MUNZINGER MANFRED

IPC: C07C51/48 ,  C07C51/02 ,  C07C65/03 ,  C07C65/21 ,  C07C65/24

Abstract: PCT No. PCT/EP98/00705 Sec. 371 Date Jul. 28, 1999 Sec. 102(e) Date Jul. 28, 1999 PCT Filed Feb. 9, 1998 PCT Pub. No. WO98/37054 PCT Pub. Date Aug. 27, 1998A process for the isolation of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid of the formula I from an aqueous solution of its metal salt comprises a) reacting the metal salt of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid with an organic or inorganic acid; b) heating the reaction mixture until a liquid two-phase system of organic and aqueous phase has formed; and c) separating the organic phase from the aqueous phase.