摘要
由于在α-烯烃、二烯烃以及苯乙烯聚合中的单中心催化性能,茂金属催化剂备受学术界和企业界的关注.为了进一步提高催化剂的活性、利用效率以及防止粘釜现象的发生和有效控制催化产物的微形貌,茂金属催化剂通常要负载在载体上进行使用.对茂金属催化剂的基本结构及发展历程进行了介绍,综述了茂金属催化剂载体的种类,包括MgCl2、分子筛或多孔材料、层状材料、聚合物、碳纳米管和石墨、硅胶载体,总结了其自负载的特点和性能,指出开发高活性催化剂及其高效负载化工艺仍是今后该领域的重要工作.
Abstract
Metallocene catalysts have attracted attention from both academic and business communities due to the single center catalytic performance in the polymerization of α-olefins,dienes and styrene.In order to further improve the activity and utilization efficiency of catalysts,prevent the occurrence of kettle sticking phenomenon and effectively control the microstructure of catalytic products,metallocene catalysts are usually loaded on the carrier for use.The basic structure and development history of metallocene catalysts were introduced,and the kinds of supports for metallocene catalysts were summarized,including MgCl2,molecular sieves or porous materials,layered materials,polymers,carbon nanotubes and graphite,and silica gel,and self-loading characteristics and properties were summarized.It was pointed out that it was still an important work to search for highly active catalysts and their efficient loading processes in this field in the future.
基金项目
中国石油天然气股份有限公司合同项目(DQZX-KY-ZZ-019)
NETL
NSTL
万方数据