发明名称 |
PROCESS FOR THE PURIFICATION OF 1,2-DICHLOROETHANE |
摘要 |
A process for the purification of 1,2-dichloroethane is described, in which the crude product, containing not more than 3% by weight of high-boilers, is distilled in a first column at 125 DEG to 180 DEG C. in such a way that the bottom product contains not more than 7% by weight of high-boilers. The purified, vaporous 1,2-dichloroethane discharged at the head of this column is used to heat product streams containing 1,2-dichloroethane. The bottom product from the first column is distilled in a second column, advantageously at a pressure of 5 to 40 kPa, together with a feed composed of vaporous 1,2-dichloroethane obtained from the reaction of ethylene with chlorine. The process makes it possible to purify 1,2-dichloroethane with a saving in energy. |
申请公布号 |
EP0203478(B1) |
申请公布日期 |
1989.03.08 |
申请号 |
EP19860106682 |
申请日期 |
1986.05.16 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
SCHWARZMAIER, PETER;FROHLICH, WALTER, DR.;KUHN, WENZEL, DR.;RIEDL, JOSEF, DR.;SCHAFFELHOFER, IWO, DR.;MITTERMAIER, ERICH;KRUMBOCK, REINHARD |
分类号 |
C07C17/04;C07C17/00;C07C17/38;C07C17/383;C07C19/045;C07C67/00 |
主分类号 |
C07C17/04 |
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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