Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1998-04-08
1999-05-18
Nazario-Gonzalez, Porfirio
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
556 12, 556 53, 526160, 526943, 502103, 502117, C07F17/00;7/00
Patent
active
059051620
ABSTRACT:
Racemic, bridged hafnocene is produced in enhanced yield by reacting a hafnium halide-aliphatic polyether adduct that has been formed and/or heated at one or more temperatures of at least about 40.degree. C., and a metallated bis(cyclopentadienyl-moiety-containing) ligand, at one or more temperatures for a sufficient period of time such that a racemic, bridged hafnocene is produced. The reaction is performed in the substantial absence of tetrahydrofuran and/or any other ether solvent or diluent that causes the formation of a tarry residue in the reaction mixture.
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Albemarle Corporation
Nazario-Gonzalez Porfirio
Pippenger Philip M.
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