SiO2负载型铁系催化剂催化乙烯齐聚的研究  

Study on SiO_2-supproted Iron-based Catalysts in Ethylene Oligomerization

作　　者：郝月梅[1] 李化毅[2] 刘宾元[1] 

机构地区：[1]河北工业大学化工学院高分子科学与工程研究所,天津300130 [2]中国科学院化学研究所,工程塑料重点实验室,北京100190

出　　处：《高分子通报》2012年第7期79-83,共5页Polymer Bulletin

基　　金：高等学校博士学科点专项科研基金(200800800002,[2008]220);河北省科技支撑计划(09215110D)

摘　　要：制备了硅胶负载型2,6-二亚胺基吡啶铁系齐聚催化剂。考察了不同负载温度,聚合中乙烯加压方式,催化剂的加入量以及丙烯对乙烯齐聚活性和α-烯烃分布的影响。结果表明,低温负载有利于催化剂活性提高,分段加压可以使催化剂的活性周期增加,聚合温度平稳,单位助催化剂MAO转化的乙烯量增加,而α-烯烃的选择性基本不变。Fe催化剂负载后,以单位助催化剂MAO计算的乙烯转化率提高。增加催化剂的量后,单位助催化剂MAO转化的乙烯量增加。在乙烯齐聚中加入少量丙烯催化剂的活性降低,α-烯烃分布向低碳方向移动。The 2, 6-Bis （imino） - Pyridyl Ligands iron-based catalysts supported on SiO2 were prepared. The catalytic activity and selectivity of the system in ethylene oligomerization were studied under different supported temperature, reaction pressures, the amount of catalysts and propylene. The results showed that low supported temperature is good to catalytic activities. The activity cycle increased and polymerization temperature was stable, and ethylene conversion of unit cocatalyst methylaluminoxane（MAO） increased when using section pressure mode. But the selectivities of α-olefins almost invariant. The activities calculated by unit MAO increased after SiO2-supported. With the increase of catalysts, the ethylene conversion of unit MAO increases. The activities decrease when adding propylene and more low-molecular-weight products were produced.

关 键 词：Α-烯烃 乙烯齐聚 SiO2负载型铁系催化剂 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]