申请人:DOWELANCO
公开号:EP0436989A1
公开(公告)日:1991-07-17
Cis- and trans-1,3-dichloropropenes and their homologs and 1,3-dibromopropenes can be prepared by isomerizing the corresponding 3,3-dihalopropene or homolog thereof in a simple, high yield process by contacting the latter with an effective silica, alumina, or zeolite catalyst. Thus, a mixture of cis- and trans-1,3-dichloropropenes is produced in good yield and with good selectivity when a mixture of 3,3-dichloropropene with other chlorinated hydrocarbons, principally 1,2-dichloropropane, is contacted with an acidic activated alumina catalyst at a temperature of about 100°C.
顺式和反式-1,3-二氯丙烯及其同系物和 1,3-二溴丙烯可通过将相应的 3,3-二卤丙烯或其同系物与有效的二氧化硅、氧化铝或沸石催化剂接触,以简单、高收率的工艺进行异构化来制备。因此,当 3,3-二氯丙烯与其他氯代碳氢化合物(主要是 1,2-二氯丙烷)的混合物在约 100°C 的温度下与酸性活化氧化铝催化剂接触时,可生产出顺式和反式-1,3-二氯丙烯混合物,且产率高,选择性好。