Phosphated calcined alumina
Patent 4788171 Issued on November 29, 1988. Estimated Expiration Date: 
February 2, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 2, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPhosphated alumina or aluminum phosphate chromium catalyst Polyphosphate in chromium catalyst support Phosphorus containing hydrofining catalysts Patent #: 4588706 InventorAssigneeApplicationNo. 07/010258 filed on 02/02/1987US Classes:502/155, Including phosphorus or sulfur or compound containing nitrogen or phosphorus or sulfur502/208, Phosphorus or compound containing same502/210, And Group VI metal (i.e., Cr, Mo, W or Po,)526/105, Contains non-transition elemental metal, hydride thereof, or nontransition metal to carbon atom bond526/106, Metal oxide is of chromium526/134, Boron compound contains boron bonded to hydrogen or to carbon atom526/156Inorganic oxygen containing aluminum compoundExaminersPrimary: Konopka, P. E.Attorney, Agent or FirmInternational ClassesB01J 37/00 (20060101)C09C 1/40 (20060101) B01J 23/16 (20060101) B01J 23/26 (20060101) B01J 27/14 (20060101) B01J 27/16 (20060101) B01J 37/28 (20060101) C08F 10/00 (20060101) AbstractAlumina is calcined and thereafter given a phosphating treatment. The resulting composition is particularly suitable for a support for a transition metal compound such as chromium oxide to provide an olefin polymerization catalyst. The resulting catalyst is capable of producing polymer at unusually high productivity rates and also gives the ability to produce high melt flow polymer. |
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