Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Sulfur or compound containing same
Reexamination Certificate
2007-05-08
2007-05-08
Lorengo, J. A. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Sulfur or compound containing same
C502S210000, C502S214000, C502S219000, C502S251000, C502S254000, C502S256000, C502S415000, C502S305000, C502S319000, C502S320000, C423S625000, C526S101000, C526S104000, C526S105000, C526S106000
Reexamination Certificate
active
10829850
ABSTRACT:
Methods of preparing a polymerization catalyst are provided that include contacting a support comprising alumina with a sulfating agent and with chromium. In an embodiment in which the chromium is provided from a chromium compound such as chromium oxide, the support may be calcined after loading the sulfating agent and the chromium on the support. Alternatively, the sulfating agent can be loaded on the support while calcining it. In another embodiment in which the chromium is provided from an organochromium compound, the support may be calcined after contacting it with the sulfating agent and before contacting it with the organochromium compound. Catalysts compositions formed by the foregoing method are provided. In an embodiment, catalyst compositions comprise chromium and a sulfate treated alumina support. The catalyst compositions have an activity for ethylene polymerization that is at least about 25% greater than an activity of the same catalyst without sulfate.
REFERENCES:
patent: 2959577 (1960-11-01), Hogan
patent: 3168460 (1965-02-01), Lehman et al.
patent: 3624063 (1971-11-01), Witt
patent: 3821123 (1974-06-01), Germanas et al.
patent: 3838039 (1974-09-01), Vesely et al.
patent: 3976632 (1976-08-01), Delap
patent: 4246095 (1981-01-01), Antos
patent: 4444966 (1984-04-01), McDaniel
patent: 4607019 (1986-08-01), Best
patent: 4690990 (1987-09-01), McDaniel et al.
patent: 4803253 (1989-02-01), McDaniel et al.
patent: 4806513 (1989-02-01), McDaniel et al.
patent: 4855271 (1989-08-01), McDaniel et al.
patent: 5037911 (1991-08-01), McDaniel et al.
patent: 5179178 (1993-01-01), Stacy et al.
patent: 5182247 (1993-01-01), Kuhlmann et al.
patent: 5200379 (1993-04-01), McDaniel et al.
patent: 5237025 (1993-08-01), Benham et al.
patent: 5244990 (1993-09-01), Mitchell
patent: 5270273 (1993-12-01), Pelrine et al.
patent: 5275992 (1994-01-01), Mitchell et al.
patent: 5401820 (1995-03-01), McDaniel et al.
patent: 5494571 (1996-02-01), Umansky et al.
patent: 5565175 (1996-10-01), Hottovy et al.
patent: 5883036 (1999-03-01), Fujie et al.
patent: 5965675 (1999-10-01), Kellum et al.
patent: 5998558 (1999-12-01), Wasserman et al.
patent: 6107230 (2000-08-01), McDaniel et al.
patent: 6239235 (2001-05-01), Hottovy et al.
patent: 6326328 (2001-12-01), Matsuzawa
patent: 6734266 (2004-05-01), Gao et al.
patent: 0 734 766 (1996-10-01), None
patent: WO 99/60033 (1999-11-01), None
patent: WO 01/32307 (2001-05-01), None
Hieber, et al., “Some Correlations Involving the Shear Viscosity of Polystyrene Melts,”Rheol Acta, vol. 28, No. 4, 1989, pp. 321-332.
Hieber, et al., “Shear-Rate-Dependence Modeling of Polymer Melt Viscosity,”Polymer Engineering and Science, vol. 32, No. 14, Jul. 1992, pp. 931-938.
Bird, et al., “Dynamics of Polymeric Liquids, vol. 1, Fluid Mechanics,” 2ndEdition, John Wiley & Sons, 1987, 10 pgs.
McDaniel, “Supported Chromium Catalysts for Ethylene Polymerization,”Advances in Catalysis, vol. 33, 1985, pp. 47-98.
McDaniel, et al., “Long Chain Branching in Polyethylene From the Phillips Chromium Catalyst,”Polymer Reaction Engineering, vol. 11, No. 2, 2003, 40 pgs.
International Search Report and Written Opinion of the International Searching Authority, PCT/US2005/009668, Oct. 5, 2005, 6 pgs.
Benham Elizabeth A.
Collins Kathy S.
DesLauriers Paul J.
McDaniel Max P.
Carroll Rodney B.
Chevron Phillips Chemical Company LP
Conley & Rose, P.C.
Hailey Patricia L.
Huseman Cheryl L.
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