茂金属加合物技术的工业应用试验

根据中国石化集团公司开发的茂金属加合物专利技术，进行了活性组分负载化研究，完成了茂金属加合物催化剂催化乙烯以及乙烯与α-烯烃共聚的淤浆、环管淤浆、气相流化床工艺的中试试验.在中试的基础上进行了茂金属加合物催化剂气相流化床聚乙烯工艺的工业应用试验，探索了茂金属催化剂与Ziegler催化剂之间的切换技术，开发了催化剂结构和配方以及聚合工艺参数对聚乙烯树脂牌号的调控技术.得到百吨级薄膜牌号的茂金属聚乙烯树脂，并对工业应用试验产品进行了加工研究.

COMMERCIAL TRIAL ON METALLOCENE ADDUCT TECHNOLOGY

Metallocene catalyst was prepared based on the SINOPECDK]’s “Metallocene Adduct Technology”.Great effort was paid on the support procedure to obtain the supported catalysts. The supported catalysts were evaluated in slurry, loop slurry and gas phase fluidized bed pilot plant of polyethylene processes respectively. The metallocene adduct catalyst could catalyze the polymerization of ethylene as well as the co-polymerization of ethylene with α-olefin. Based on the pilot plant experiment results the commercial trial was carried out successfully in a 60000 t•a-1 plant of gas phase fluidized bed polyethylene process for the production of metallocene-based linear low density polyethylene. The resin-grade switching technology between metallocene adduct and Ziegler catalyst was investigated. The influence of the supported catalyst composition and the polymerization controlling parameters on the properties of the obtained polyethylene resin was also studied.The processability and performance of the film-grade resin seem to be acceptable as compared to the analogous materials in the commercial mLLDPE market.