新型高性能乙烯淤浆聚合Ziegler-Natta催化剂的开发

Preparation of new Ziegler-Natta catalyst with high performance for ethylene slurry polymerization process

通过引人卤代醇类化合物制备了适用于乙烯淤浆聚合工艺的新型高性能Ziegler—Natta催化剂（简称GH催化剂）。采用分光光度计、扫描电子显微镜等表征了催化剂的组成、粒径和形态等；采用淤浆聚合法研究了催化剂的聚合性能，并与国产商业化催化剂（参比催化剂）进行了比较。结果表明：GH催化剂的活性达21．6kg／g，聚乙烯堆密度达0．34g／cm2，粒径≥75—830岬的聚乙烯粉料质量占聚乙烯粉料总质量的97．9％，且GH催化剂的氢调敏感性和其催化乙烯与1一己烯共聚合的性能均优于参比催化剂。

A kind of new Ziegler-Natta catalyst with high performance for ethylene slurry polymeri- zation process, called GH catalyst, was prepared by introducing halogenated alcohol compounds. The composition, particle size and morphology of the catalyst were characterized by spectrophotometer, scanning electron microscope （SEM） and so on. The polymerization performance of the catalyst was studied in ethylene slurry polymerization and compared with that of a domestic commercial catalyst as reference catalyst. The results show that the activity of GH catalyst reaches 21.6 kg/g. The bulk density of the polyethylene powders is up to 0.34 g/cm3, and the polyethylene powders with particle size of 75-830 ~tm account for 97.9% of total polyethylene powders by mass. The hydrogen response and catalytic performance in copolymerization of ethylene and 1-hexene of GH catalyst are superior to those of the reference catalyst.