镍螯合物催化乙烯齐聚制低碳α-烯烃

Catalytic Oligomerization of Ethylene to Lower α Olefins by Nickel Chelate

镍螯合物催化乙烯齐聚制低碳α－烯烃刘东兵＊宋焕玲李达刚（中国科学院兰州化学物理研究所兰州７３００００）关键词乙烯，催化齐聚反应，α－烯烃，镍螯合物１９９６－１０－１７收稿，１９９７－０３－１０修回乙烯齐聚所得到的偶碳数α－烯烃是生产各种化工产品和日化...

The oligomerization of ethylene catalyzed by P O ligands, diphenylphosphi nobenzoic acid(DPP) and diphenylphosphinoacetic sodium(DPE), has been investigated. In catalytic system DPP/NiCl 2·6H 2O/NaBH 4 the content of lower olefins (C = 4￣C = 8) increases with increase of DPP/Ni molar ratio and the content of higher olefins decreases markedly. Phosphines P(CH 3) 2Ph, P(OPh) 3, P(C 4H 9) 3, PClPh 2 and PPh 3 added in the catalytic system DPE/NiCl 2·6H 2O/NaBH 4 increase the content of C = 4 up ot 77 96%￣95 29% from 49 45%(without their addition). Among these phosphines only P(C 4H 9) 3 could increase the selectivity to linear α olefin. The reaction conditions have been investigated.