Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2005-06-21
2005-06-21
Lu, Caixia (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S113000, C502S129000, C502S131000, C502S132000, C502S152000, C526S129000, C526S160000, C526S165000, C526S943000
Reexamination Certificate
active
06908876
ABSTRACT:
The present invention relates to a supported catalyst system for olefin polymerization which comprises at least one metallocene component and a support of an inorganic oxide of silica, aluminum or a polymer containing hydroxyl groups. The support is modified with an organogermane and/or organotin compound. The inventive catalyst system produces minimal reactor fouling, has excellent productivity and good hydrogen responsiveness. The present invention also relates to a process for preparing the catalyst system and to the slurry/suspension or gas-phase polymerization of olefins using the catalytic system, optionally with a small amount of aluminoxane cocatalyst.
REFERENCES:
patent: 4808561 (1989-02-01), Welborn
patent: 4871705 (1989-10-01), Hoel
patent: 4874734 (1989-10-01), Kioka et al.
patent: 5206199 (1993-04-01), Kioka et al.
patent: 5627246 (1997-05-01), Langhauser et al.
patent: 5824620 (1998-10-01), Vega et al.
patent: 6133187 (2000-10-01), Vega et al.
patent: 6177526 (2001-01-01), Fritze
patent: 6194343 (2001-02-01), Collins et al.
patent: 6201081 (2001-03-01), Shamshoum et al.
patent: 6225251 (2001-05-01), Shamshoum et al.
patent: 6239059 (2001-05-01), Saudemont et al.
patent: 6239060 (2001-05-01), Dockter et al.
patent: 6486936 (2002-11-01), Sugimoto
patent: 6506866 (2003-01-01), Jacobsen et al.
patent: 6528596 (2003-03-01), Takaoki et al.
patent: 206794 (1986-12-01), None
patent: 302424 (1989-02-01), None
patent: 354893 (1990-02-01), None
patent: 426646 (1991-05-01), None
patent: 757992 (1997-02-01), None
patent: 802203 (1997-10-01), None
patent: WO 200226842 (2002-10-01), None
Giannetti et al., “Ethylene Polymerization by IVB Transition Metal Complexes/Methyl Aluminoxane Catalyst Systems”,Journal of Polymer Science: Polymer Chemistry Edition, vol. 23, pp. 2117-2133 (1985).
Soga et al., “Activation of SiO2-Supported Zirconocene Catalysts by Common Trialkylaluminiums”,Makromolecular Chemistry, 194, pp. 3499-3504 (1993).
Harlan et al., “tert-Butylaluminum Hydroxides and Oxides: Structural Relationship between Alkylalumoxanes and Alumina Gels”,Organometallics, 13, pp. 2957-2969 (1994).
Harlan et al., “Three-Coordinate Aluminum is Not a Prerequisite for Catalytic Activity in the Zirconocene—Alumoxane Polymerization of Ethylene”,Journal of the American Chemical Society, 117, pp. 6465-6474 (1995).
Uozumi et al., “Copolymerization of Ethylene and 1-octene with Cp*TiCl3as Catalyst Supported on 3-aminopropyltrimethoxysilane treated SiO2”,Macromolecular Rapid Communication, 18, pp. 9-15 (1997).
Tait and Ediati, “Supported Metallocene Catalysts for Propene Polymerization”,Metalorganic Catalysts for Synthesis and Polymerisation, pp. 307-320 (1999).
Przybyla et al., “Influence of the Particle Size of Silica Support on the Genetics and the Resulting Polymer Properties at the Polypropylene Polymerization with Heterogeneous Metallocene catalysts; Part I: Experimental Studies and Genetic Analysis”,Metalorganic Catalysts for Synthesis and Polymerisation, pp. 321-332 (1999).
dos Santos et al., “Organosilicon-Modified Silicas as Support for Zirconocene Catalyst”,Journal of Molecular Catalysis, 154, pp. 103-113 (2000).
Rytter et al., “Methylaluminoxane as a Cocatalyst for Olefin Polymerization. Structure, Reactivity and Cocatalytic Effect”,Organometallic Catalysts and Olefin Polymerization, pp. 23-27 (2001).
Abu-Raqabah Atieh
Akhtar Muhammad Naseem
Al-Saleh Muhammad A.
Atiqullah Muhammad
Ibrahim Muhammad
Kramer Levin Naftalis & Frankel LLP
Lu Caixia
Saudi Basic Industries Corporation
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