发明名称 |
PROCESS FOR THE PREPARATION OF ACETIC ACID AND ACETIC ANHYDRIDE |
摘要 |
To prepare acetic acid and acetic anhydride, methanol and methyl acetate are reacted under anhydrous conditions with carbon monoxide in the presence of a catalyst system containing carbonyl complexes of group VIII noble metals, methyl iodide, an alkali metal acetate or iodide, or quaternary organophosphonium or organoammonium acetate or iodide. The hot carbonylation mixture is decompressed, the evaporated components are fed to a first distillation zone, and the catalyst solution which remains is fed back to the reaction zone. In the first distillation zone, the volatile carbonylation products are subjected to fractional distillation; the low-boiling methyl iodide and methyl acetate pass back into the reaction zone, and the bottom product produced is a mixture of acetic acid and acetic anhydride, which is split into the pure components in a second distillation zone and a third distillation zone.
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申请公布号 |
CA1339278(C) |
申请公布日期 |
1997.08.12 |
申请号 |
CA19890604356 |
申请日期 |
1989.06.29 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
ERPENBACH, HEINZ;GEHRMANN, KLAUS;JAGERS, ERHARD;KOHL, GEORG |
分类号 |
B01J31/20;C07B61/00;C07C51/12;C07C51/56;C07C53/08;C07C53/12;(IPC1-7):C07C51/12 |
主分类号 |
B01J31/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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