发明名称 |
PROCESS FOR THE PREPARATION OF 2-AMINO-3-CHLOROBENZOIC ACID |
摘要 |
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.
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申请公布号 |
CA2076142(A1) |
申请公布日期 |
1993.02.17 |
申请号 |
CA19922076142 |
申请日期 |
1992.08.14 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
PAPENFUHS, THEODOR;RAPP, JOCHEN |
分类号 |
B01J27/122;C07B61/00;C07C227/08;C07C229/56;(IPC1-7):C07C229/56 |
主分类号 |
B01J27/122 |
代理机构 |
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主权项 |
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地址 |
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