The present invention relates to a magnesium compound-supported nonmetallocene catalyst, which is produced by directly contacting a catalytically active metallic compound with a nonmetallocene ligand-containing magnesium compound, or by directly contacting a nonmetallocene ligand with a catalytically active metal-containing magnesium compound, through an in-situ supporting process. The process is simple and flexible. In the process, there are many variables in response for adjusting the polymerization activity of the catalyst, and the margin for adjusting the catalyst load or the catalyst polymerization activity is broad. The magnesium compound-supported nonmetallocene catalyst according to this invention can be used for olefin homopolymerization/ copolymerization, in combination with a comparatively less amount of the co-catalyst, to achieve a comparatively high polymerization activity. Further, the polymer product obtained therewith boasts high bulk density and adjustable molecular weight distribution.
本发明涉及一种
镁化合物支撑的非茂
金属催化剂,它是通过原位支撑工艺,将具有催化活性的
金属化合物与含有非茂
金属配位体的
镁化合物直接接触,或将非茂
金属配位体与具有催化活性的含
镁金属化合物直接接触而制得的。该工艺简单而灵活。在该工艺中,调节催化剂聚合活性的响应变量很多,调节催化剂负载或催化剂聚合活性的余地很大。根据本发明的
镁化合物支撑的非茂
金属催化剂可用于烯烃均聚/共聚,与相对较少用量的助催化剂结合使用,可获得相对较高的聚合活性。此外,由此获得的聚合物产品具有较高的体积密度和可调节的分子量分布。