文献类型：期刊文章

作　　者：马志[1,2] 孙文华[1] 王航[1,2] 阎卫东[3] 胡友良[1]

机构地区：[1]中国科学院化学研究所分子科学中心,工程塑料国家重点实验室,中国石油天然气股份有限公司催化重点实验室北京催化研究室 [2]中国科学院研究生院,北京100039 [3]河北工业大学化工学院高分子科学与工程研究所

出　　处：《高分子学报》

基　　金：国家重点基础研究发展规划项目 (项目号G19990 64 80 0 );国家重点自然科学基金 (基金号 2 973 414 1);中国石油天然气集团公司和工程塑料国家重点实验室开放基金 (SKLEP 0 0 62 )资助项目

年　　份：2002

卷　　号：12

期　　号：5

起止页码：703-706

语　　种：中文

收录情况：AJ、BDHX、BDHX2000、CAS、CSCD、CSCD2011_2012、IC、JST、PL、RCCSE、SCI(收录号：WOS:000178936800032)、SCI-EXPANDED(收录号：WOS:000178936800032)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：A new iron based catalyst 2,6\|bis[(1\|fluorenylimino)ethyl] pyridine iron dicloride (2) was synthesized via Shiff base condensation with 2,6\|diacetylpyridine and 9\|aminofluorene hydrochloride under formic acid as catalyst.Ethylene oligomerizations were carried out using this new catalyst and methylaluminoxane as cocatalyst under various conditions.The effects of Al/Fe molar ratio,reaction temperature and ethylene pressure on catalytic activity and product distribution were investigated.This novel catalyst had a good activity for ethylene oligomerization (e.g. 4 21×10 6g oligomers\5mol -1 Fe·h -1 ,Al/Fe molar ratio=2000,reaction temperature=40℃,ethylene pressure=1 5?MPa).The catalytic activity increased with the increasing concentration of MAO.The tendency to produce more C 4～C 10 olefins was attributed to the more chain transfer reactions to MAO.The higher the reaction temperature,the lower catalytic activity was present.The reasonable explanation was the combination of the accelerated catalyst’s deactivation and the decrease in ethylene concentration in solvent due to the elevated temperature.Under such condition,however,the oligomerization of ethylene produced more short chain olefins which are adapted to act as comonomers for preparation of linear low density polyethylene materials.Ethylene pressure in autoclave also had an important influence on catalytic activity and carbon\|number distribution of product.The catalytic activity increased sharply with the elevated ethylene pressure.However,the proportion of C 4～C 10 olefins in product decreased in higher pressure due to the enhanced chain propagation reaction.The research work indicated that the control of catalytic activity and product distribution can be realized by the variation of oligomerization conditions such as Al/Fe molar ratio,reaction temperature and ethylene pressure.The results also showed that the ethylene oligomerization employing this novel iron\|based catalyst mainly produces the C 4～C 10 olefins with high selectivity for linea

关 键 词：双亚胺吡啶铁系催化剂  乙烯 低聚 产物碳数分布  Α-烯烃 选择性  低密度聚乙烯

分 类 号：TQ325]