Invention Patent
- Patent Title: PROCESS FOR THE PREPARATION OF 2-AMINO-3-CHLOROBENZOIC ACID
-
Application No.: CA2076142Application Date: 1992-08-14
-
Publication No.: CA2076142A1Publication Date: 1993-02-17
- Inventor: PAPENFUHS THEODOR , RAPP JOCHEN
- Applicant: HOECHST AG
- Assignee: HOECHST AG
- Current Assignee: HOECHST AG
- Priority: DE4127150 1991-08-16
- Main IPC: B01J27/122
- IPC: B01J27/122 ; C07B61/00 ; C07C227/08 ; C07C229/56
Abstract:
HOE 91/F 252 of the disclosure: Process for the preparation of 2-amino-3-chlorobenzoic acid The present invention relates to a process for the preparation of 2-amino-3-chlorobenzoic acid by dissolving 1 mol of 2,3-dichlorobenzoic acid in about 400 to about 2000 parts of water with at least the equimolar amount of an alkali metal hydroxide or with an aqueous solution of the equimolar amount of an alkali metal hydroxide, and subsequently reacting it with about 500 to about 2500 mol % of ammonia at temperatures of about 150.degree. to about 220.degree.C in the presence of copper bronze, copper(I) salts and/or copper(II) salts.
Information query