ACS Catalysis

Selective ethylene tri-/tetramerization by in situ-formed chromium catalysts stabilized by N, P-based ancillary ligand systems

Y Yang, Z Liu, B Liu, R Duchateau

Index: Yang, Yun; Liu, Zhen; Liu, Boping; Duchateau, Robbert ACS Catalysis, 2013 , vol. 3, # 10 p. 2353 - 2361

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Citation Number: 11

Abstract

A series of N, P-based ancillary ligands have been synthesized, and the corresponding catalysts, formed in situ by mixing one of the N, P-ligands, Cr (acac) 3 and MAO, have been tested for ethylene oligomerization. Under standard ethylene oligomerization conditions (30 bar ethylene, 60° C, methylcyclohexane solvent), all of the in situ-formed complexes show catalytic activity, producing oligomers together with varying amounts of polyethylene (PE). ...