摘要
在M催化剂组分中引入甲基环己基二甲氧基硅烷作为给电子体制备了新型高活性气相聚乙烯GM催化剂,通过BET和SEM等方法对GM催化剂进行了表征;采用淤浆聚合的方法评价了GM催化剂的活性,考察了GM催化剂的动力学行为,并在Unipol工艺气相聚乙烯装置上进行了工业试验。试验结果表明,在冷凝态操作模式下GM催化剂的活性达5000～6000g/g,聚乙烯产品的堆密度达0.40g/cm^3,比M催化剂的活性提高近一倍,聚乙烯产品的堆密度提高近25%。GM催化剂的氢调敏感性优于M催化剂,共聚性能与M催化剂相当。工业试验过程中装置运行稳定,各项操作参数均能满足工艺要求,得到的聚乙烯产品为优级品。
A high active MgCl2/SiOz Ziegler-Natta catalyst （ GM catalyst ） with cyclohexylmethyldimethoxysilane as internal electron donor was prepared and used in ethylene gas phase polymerization. The catalyst was characterized by means of BET and SEM. The polymerization kinetics of the catalyst was investigated. Industrial application of GM catalyst was carried out in Unipol gas phase polyethylene process. The results showed that under condensation state, activity of GM catalyst achieved 5 000 -6 000 g/g, two times as active as M catalyst, and bulk density of the produced polyethylene was 0.40 g/cm^3, 25% higher than that using M catalyst. GM catalyst showed better hydrogen response ability than M catalyst and its copolymerization ability was same as that of M catalyst. The industrial operation was stable and high grade polyethylene could be produced by using GM catalyst.
出处
《石油化工》
CAS
CSCD
北大核心
2010年第8期919-923,共5页
Petrochemical Technology
基金
教育部“高校新世纪优秀人才支持项目”(NCET-07-0142)
黑龙江省高校“新世纪优秀人才培养计划”项目(NCET-06-010)
