发明名称 |
PROCESS FOR PURIFYING HYDROGEN CHLORIDE GAS |
摘要 |
Hydrogen chloride gas obtained as a by-product in the production of chloroacetic acid by subjecting acetic acid to a catalytic chlorination reaction with chlorine gas in the presence of acetic anhydride and/or acetyl chloride is purified. The prepurified by-product still contains 0.1-3 vol % acetyl chloride and up to 0.1 vol % chloroacetyl chloride. For purification, the hydrogen chloride gas is passed through two zones series-connected together and scrubbed in countercurrent fashion. More particularly, it is scrubbed in the first zone with concentrated hydrochloric acid and in the second zone with concentrated sulfuric acid. |
申请公布号 |
DE3663793(D1) |
申请公布日期 |
1989.07.13 |
申请号 |
DE19863663793 |
申请日期 |
1986.07.08 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
MULLER, HEINZ;LOHMAR, ELMAR, DR.;SCHOLZ, HARALD, DR. |
分类号 |
B01D53/14;C01B7/07;C07C51/00;C07C51/363;C07C53/16;C07C67/00;(IPC1-7):C01B7/07 |
主分类号 |
B01D53/14 |
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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