发明名称 |
A process for recovering acid chlorides. |
摘要 |
Chlorination of an acid with a chlorinating agent produces a reation mixture from which the desired acid chloride may be recovered by distillation. In the chlorination and distillation, by-products, polymers and degradation products may be produced which can cause a decrease in the yield of the desired acid chloride. A particular problem arises from the tendency of acid chlorides to degrade and/or polymerize when subjected to excessive temperatures for long periods. An improved process for recovering an acid chloride from a mixture containing the acid consists in distilling the acid chloride from the mixture in the presence of an effective quantity of a distillation improvement additive, Such as an organo polysiloxane or a mineral oil, which remains substantially liquid under the conditions of distillation. In this way the problems referred to are reduced or overcome and increased yields of acid chloride are obtained.
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申请公布号 |
EP0002965(A1) |
申请公布日期 |
1979.07.11 |
申请号 |
EP19780300917 |
申请日期 |
1978.12.28 |
申请人 |
STAUFFER CHEMICAL COMPANY |
发明人 |
CISCO, THOMAS FRANCIS;AGATE, ROBERT NICHOLAS;HANSEN, GEORGE EMIL |
分类号 |
C07D307/46;C07D307/54;C07D307/68;C07D333/24;C07D333/38;(IPC1-7):C07D333/24 |
主分类号 |
C07D307/46 |
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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