Perovskite-type oxidation catalysts and method for preparing the catalysts
Patent 4748143 Issued on May 31, 1988. Estimated Expiration Date: 
June 6, 2006. 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.
June 6, 2006. 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 References 3901828 3922204 Process for preparing mixed metal oxide catalysts Patent #: 4134852 InventorsApplicationNo. 06/871551 filed on 06/06/1986US Classes:502/304, Cerium502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/525PEROVSKITEExaminersPrimary: Shine, W. J.Attorney, Agent or FirmInternational ClassesB01D 53/86 (20060101)B01J 23/00 (20060101) B01J 23/76 (20060101) B01J 23/83 (20060101) Foreign Application Priority Data1985-06-07 JPAbstractAn oxidation catalyst of the perovskite-type compound oxide which comprises, as A site, a mixture of rare earth elements from ores, part of which is replaced by at least one element selected from alkali metals, alkaline earth metals and rare earth elements other than the ore-originating elements, and a transition metal as B site. The surface atomic ratio of the mixed rare earth elements and the transition metal is in the range of 1.0:1.0 to 1.1.:1.0. A method for preparing the compound oxide is also described. |
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