A process for preparing a linear a-olefin having from 4 to 20 carbon atoms is disclosed which comprises polymerizing ethylene or gas containing ethylene in the presence of a catalyst consisting of a zirconium halide, an organoaluminium compound and a Lewis base, and adding a catalyst deactivating agent to the resulting reaction mixture, wherein said Lewis base is at least one member selected from the group consisting of thioethers, alkyl disulfides, thiophenes, thiourea, sulfides, phosphines and primary amines.
Use of the catalyst enables preparation of linear a-olefins of a high purity and reduction in the amount of by-produced wax.
                            本发明公开了一种制备具有 4 至 20 个碳原子的线性 a-烯烃的工艺,该工艺包括在由卤化
锆、
有机铝化合物和路易斯碱组成的催化剂存在下聚合
乙烯或含
乙烯的气体,并向生成的反应混合物中添加催化剂失活剂,其中所述路易斯碱至少是选自
硫醚、烷基二
硫化物、
噻吩、
硫脲、
硫化物、膦和
伯胺组成的组中的一个成员。 使用该催化剂可制备高纯度的线性 a-烯烃,并减少副产蜡量。