α-Ti(HPO_4)_2微球负载型催化剂的合成及其烯烃聚合催化性能（英文）  

Spherical α-Ti(HPO_4)_2 Supported Catalysts:Synthesis and Catalytic Properties in Olefin Polymerizations

作　　者：袁苑 义建军[2] 石于坚[1] 徐庆红 

机构地区：[1]北京化工大学理学院,化工资源有效利用国家重点实验室,北京100029 [2]中国石油天然气股份有限公司石油化工研究院,北京102206

出　　处：《无机化学学报》2017年第12期2329-2337,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.U1362113)资助项目~~

摘　　要：2种茂金属催化剂及1种后过渡金属催化剂分别被固载于经过甲基铝氧烷处理后的α-Ti(HPO_4)_2微球表面,制备得到3种微球负载型催化剂。在烯烃聚合反应过程中,3种负载型催化剂均表现出比硅胶负载型催化剂更高的催化活性。2种茂金属负载型催化剂在乙烯、丙烯聚合反应中的活性分别高达6.8×10~7 gPE·(molZr·h)^(-1)和5.0×10~7 gPP·(molZr·h)^(-1),所产生的烯烃聚合产物分子量分布较窄(Mw/Mn<2.3),表现出良好的单中心催化特性,而且丙烯聚合产物的等规度高达96.5%。负载型后过渡金属催化剂在乙烯聚合反应中的活性稍低,但也能够达到8.3×10~6 gPE·(molFe·h)^(-1)。3种负载型催化剂催化烯烃聚合产物均成微球型,能够很好地复制载体的形貌。Two metallocene catalysts and one late transition metal catalyst were immobilized respectively on the surface of spherical α-Ti（HPO4）2 treated with methylaluminoxane. All the supported catalysts have higher activities than those of their referenced silica supported catalysts in olefin polymerizations. The activities of α-Ti（HPO4）2 supported metallocene catalysts in ethylene and propylene polymerizations are up to 6.8×107 gPE·（molZr·h）-1 and 5.0×107 gPP·（molZr·h）-1. These supported catalysts can produce narrow molecular weight distribution polyolefins （Mw/Mn〈2.3） and polypropylene with high isotactic index （96.5%）. The late transition metal catalyst supported on α-Ti（HPO4）2 has relatively less activity （8.3×106 gPEFe·h）-1） in ethylene polymerization but the produced polyethylene has a very broad Mw/Mn （〉19）. The particles of the produced polyolefins are mainly ball-shaped which replicate the morphology of spherical α-Ti（HPO4）2.

关 键 词：α-Ti(HPO4)2 球型 茂金属 后过渡金属催化剂 烯烃聚合 

分 类 号：O614[理学—无机化学]