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Synthesis of Heterogeneous Catalysts for Gas Phase Olefin Polymerization: Ziegler‐Natta Catalysts Modified with Indenyl Ligands
Author(s) -
Dupuy Jérôme,
Broyer JeanPierre,
Spitz Roger,
Malinge Jean
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:10<2038::aid-macp2038>3.0.co;2-u
Subject(s) - catalysis , methylaluminoxane , natta , ziegler–natta catalyst , polymer chemistry , polyethylene , olefin fiber , polymerization , chemistry , zirconium , post metallocene catalyst , phase (matter) , materials science , chemical engineering , metallocene , inorganic chemistry , organic chemistry , ethylene , polymer , engineering
A Ziegler‐Natta catalyst was first prepared by reacting a silica/magnesium chloride support with ZrCl 4 in the gas phase, then modified by contacting the supported zirconium with one equivalent of indenyl lithium salt. This new catalyst exhibits high activity when activated with methylaluminoxane both in slurry and gas phase homo‐ and copolymerizations; the polyethylene produced possesses a narrow molar mass distribution. The behavior of such a heterogeneous catalyst has been investigated under different experimental conditions, and its behavior in gas phase copolymerization (with butene) has been compared to that of Ind 2 ZrCl 2 .