Db. Liu et Dg. Li, CATALYTIC OLIGOMERIZATION OF ETHYLENE TO LOWER ALPHA-OLEFINS BY THE CATALYST SYSTEM DPA(NA) NICL2-CENTER-DOT-6H(2)O/ZN/, Applied catalysis. A, General, 166(2), 1998, pp. 255-258
The catalyst system DPA(Na)/NiCl2 . 6H(2)O/Zn (DPA(Na), sodium salt of
diphenylphosphinoacetic acid has high activity and selectivity to for
m lower alpha-olefins in the oligomerization of ethylene. The amount o
f zinc highly affects the activity, and the Zn2+ which came from the o
xidation of zinc is likely to enhance the selectivity to lower alpha-o
lefins. The solvent used in this system offers the hydrogen of the nic
kel hydride. (C) 1998 Elsevier Science B.V.