METAL COMPLEXES IN CATALYTIC CONVERSIONS OF OLEFINS. 4. HETEROGENIZATION OF NICKEL COMPLEXES ON CHEMICALLY MODIFIED SILOCHROME SURFACE; ACTIVITY AND SELECTIVITY IN ETHYLENE DIMERIZATION

Article abstract of DOI:10.1007/BF00959556

When activated by Et2AlCl phosphine-containing homogeneous nickel complexes and their heterogenized analogs (HMC) formed on silochrome S-120 modified by NH2 and N(PPh2)2 groups differ significantly in their effectiveness in ethylene dimerization.The catalytic activity of Ni-HMC-Et2AlCl depends on how the HMC was formed.Ni-HMC-I obtained by ligand exchange on chemically modified silochrome is ca. 5-15 times more effective than Ni-HMC-II synthesized from the gas phase.The selectivity in formation of α-olefins (ΣC4 + ΣC6) is ca. 4-5 times higher in the presence of Ni-HMC than for its homogeneous analogs.