公开(公告)号：US4188347A

公开(公告)日：1980-02-12

申请号：US966832

申请日：1978-12-06

申请人： Ludwig Schmidhammer ,  Hellmuth Frey

发明人： Ludwig Schmidhammer ,  Hellmuth Frey

IPC分类号： C07C17/25 ,  C07C17/00 ,  C07C17/38 ,  C07C17/383 ,  C07C17/395 ,  C07C17/42 ,  C07C19/045 ,  C07C21/06 ,  C07C67/00

CPC分类号： C07C17/395

摘要： An improved process for removal of chloroprene from 1,2-dichloroethane recovered unconverted from the effluent of 1,2-dichloroethane pyrolysis. The chloroprene is chlorinated with chlorine in the presence of o- or m-cresol or a chlorinated derivative thereof, and the excess chlorine from this step is removed by reaction with ethylene.

摘要翻译： 从1,2-二氯乙烷热解流出物未转化的1,2-二氯乙烷中除去氯丁二烯的改进方法。 在邻甲酚或间甲酚或其氯化衍生物的存在下，氯气用氯氯化，并且通过与乙烯反应除去该步骤中的过量氯。

公开(公告)号：US3998706A

公开(公告)日：1976-12-21

申请号：US604395

申请日：1975-08-13

申请人： Otto Fruhwirt ,  Hellmuth Frey ,  Ludwig Schmidhammer

发明人： Otto Fruhwirt ,  Hellmuth Frey ,  Ludwig Schmidhammer

IPC分类号： C07C17/386 ,  C07C17/00 ,  C07C17/38 ,  C07C19/01 ,  C07C19/045 ,  C07C21/04 ,  C07C67/00 ,  B01D3/34

CPC分类号： C07C17/38

摘要： A process for separating lower-boiling chlorohydrocarbons and water from neutralized crude chlorohydrocarbons having at least two carbon atoms, which comprises fractionally distilling the crude chlorohydrocarbons in a fractionating column, thereby obtaining a fraction A containing the desired product which is withdrawn at the bottom of the column practically free of impurities, and a fraction B, comprising water, impurities having a lower boiling point, and entrained amounts of the desired chlorohydrocarbon, withdrawing said fraction B from the top of the column and, while still in gaseous state, neutralizing fraction B with an aqueous solution of a mixture of basic compounds, thereby avoiding corrosion of the apparatus, and thereafter subjecting the gaseous fraction to stepwise condensation with recovery of the entrained portions of said chlorohydrocarbon by returning them to the fractionating column, while separately removing water and undesirable impurities.

摘要翻译： 从具有至少两个碳原子的中和的粗制氯烃中分离低沸点氯代烃和水的方法，其包括在分馏塔中分馏蒸馏粗的氯代烃，从而得到含有所需产物的馏分A， 柱子几乎不含杂质，和一部分B，包含水，具有较低沸点的杂质和夹带量的所需氯代烃，从塔顶排出所述馏分B，同时仍处于气态的中和馏分B 与碱性化合物的混合物的水溶液，从而避免该装置的腐蚀，然后使气态馏分经过逐步冷凝，同时回收所述氯代烃的夹带部分，将其返回到分馏塔，同时分开除去水和不希望的 杂质。