Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same
申请人:CHINA PETROLEUM & CHEMICAL CORPORATION AND BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY
公开号:US20020065378A1
公开(公告)日:2002-05-30
The present invention relates to a silica gel-supported catalyst component suitable for ethylene (co)polymerization, a catalyst therefrom and use of the same. The catalyst component according to the present invention is obtained by supporting the reaction product of a titanium compound, a halide promoter, a magnesium compound and an electron donor on silica gel having a larger specific surface area. When the resultant catalyst is used for ethylene polymerization, especially gas phase fluidized bed polymerization, not only the activity is substantially enhanced, but also the hydrogen response, copolymerizability of ethylene with other alpha-olefins, and the like are improved. The catalyst is especially suitable for the fluidized bed polymerization operated in a condensed state, with high quality LLDPE resins being obtained.
本发明涉及一种适用于乙烯(共)聚合的硅胶载体催化剂组分、其催化剂及其用途。根据本发明的催化剂组分是通过将钛化合物、卤化物促进剂、镁化合物和电子供体的反应产物支撑在具有较大比表面积的硅胶上而获得的。将得到的催化剂用于乙烯聚合,特别是气相流化床聚合时,不仅活性大大提高,而且氢反应、乙烯与其他α-烯烃的共聚性等也得到改善。该催化剂尤其适用于在缩合状态下进行的流化床聚合,可获得高质量的低密度聚乙烯树脂。