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Ethylene Oligomerization Catalyzed by Nickel(II) Diimine Complexes
Author(s) -
Qian MingXing,
Wang Mei,
Zhang YuLiang,
He Ren
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200710
Subject(s) - diimine , chemistry , catalysis , ethylene , nickel , oligomer , selectivity , toluene , induction period , molar ratio , phenylene , product distribution , polymer chemistry , medicinal chemistry , organic chemistry , polymer
Ethylene oligomerization has been investigated by using catalyst systems composed of nickel(II) diimine complexes (diimine = N, N ′‐ o ‐phenylene bis (salicylideneaminato), N, N′‐o ‐phenylenebisbenzal, N, N ′‐ethylenebisbenzal) and ethylaluminoxane (EAO). The main products in toluene and at 110–200 °C were olefins with low carbon numbers (C 4 —C 10 ). Effects of reaction temperature, Al/Ni molar ratio and reaction period on both the catalytic activity and product distribution were explored. The activity of 1.84 × 10 5 g of oligomer/(mol NI · h), with 87.4% of selectivity to C 4 —C 10 olefins, was attained at 200 °C in the reaction when a catalyst composed of NiCl 2 (PhCH = o ‐NC 6 H 4 N = CHPh) and EAO was used.