制备了一种新型高氢调敏感性乙烯淤浆聚合用催化剂（简称SEL催化剂）。考察了SEL催化剂的组成、粒子形态，催化乙烯均聚合与共聚合的性能，以及用其制备的聚乙烯的性能，并与商业化的同类型进口催化剂（简称参比催化剂）进行了对比。结果表明：SEL催化剂中钛含量高而镁含量低，粒径分布窄，颗粒形态规整；SEL催化剂催化乙烯聚合时氢调敏感性好，氢气分压为0.48MPa，乙烯分压为0.25MPa时，聚乙烯熔体流动速率达226.10g/10min；SEL催化剂催化乙烯与1-己烯共聚合的性能和聚乙烯粉料中细粉含量等均优于参比催化剂。%A novel high hydrogen sensitive catalyst for ethylene slurry polymerization,named as SEL catalyst,was prepared. The composition,particle morphology,catalytic performance for ethylene homopolymerization and copolymerization of the catalyst and properties of the polyethylene obtained was characterized and compared with those of a commercial similar imported catalyst,named as Ref catalyst. The results show that SEL catalyst has high Ti and low Mg in composition,narrow particle size distribution and regular particle morphology. The melt flow rate of the polyethylene reaches 226.10 g/10 min when the hydrogen pressure is 0.48 MPa and ethylene pressure is 0.25 MPa,which indicate that SEL catalyst has high hydrogen sensitivity. SEL catalyst is superior to Ref catalyst in performance for ethylene/1-hexene copolymerization and low fine particle content of polyethylene powders obtained.
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