[(EESiO)Ta~vCl2Me2]: A Well-Defmed Silica-Supported Tantalum(V) Surface Complex as Catalyst Precursor for the Selective Cocatalyst-Free Trimerization of Ethylene

摘要

Over the last 50 years, the production of linear 兛-olefins by ethylene oligomerization has gained increasing interest in industrial and academic research. Currently, numerous studies in this field have been reported and developed into industrial processes: titanium-based catalysts for the dimeri-zation of ethylene (Alpha-butol, IFP): chromium-based catalysts for the trimerization of ethylene (Phillips Petroleum), and more recently chromium-bearing PNP ligand for ethylene tetramerization (SASOL).