A method for preparing a supported catalyst suitable for use in slurry and gas-phase olefin polymerizations is disclosed. An alumoxane-treated silica is combined with a monocyclopentadienyl Group 6 metal complex that comprises a chelating Cp moiety to give the supported catalyst. The method is simple to practice and provides catalysts having high activity. Polyolefins made using the catalysts have high molecular weight that is readily controlled by adding hydrogen.
本文介绍了一种制备适用于液相和气相烯烃聚合的负载催化剂的方法。将经过氧化铝烷处理的
二氧化硅与含有螯合
环戊二烯基的单
环戊二烯基第六族
金属配合物结合,形成负载催化剂。该方法简单易行,制备出的催化剂活性高。使用该催化剂制备的聚烯烃具有高分子量,可通过加氢轻松控制。