Catalyst for purifying exhaust and waste gases
Patent 4221768 Issued on September 9, 1980. Estimated Expiration Date: 
April 28, 1998. 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.
April 28, 1998. 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 3885019 Process for reducing nitrogen oxides to nitrogen Catalyst for reduction of nitrogen oxides in presence of ammonia Reactivation of catalysts useful for nitrogen oxide removal Catalytic process for reducing nitrogen oxides to nitrogen Patent #: 4085193 InventorsAssigneeApplicationNo. 05/901109 filed on 04/28/1978US Classes:423/239.1, Utilizing solid sorbent, catalyst, or reactant423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/213.5, Group VIII element502/202, Boron or compound containing same502/204, And Group VI metal containing (i.e., Cr, Mo, W or Po)502/205, And bismuth containing502/206, Molybdenum containing502/207, And Group VIII metal containing (i.e., iron or platinum group)502/209, And vanadium containing502/210, And Group VI metal (i.e., Cr, Mo, W or Po,)502/211, Molybdenum502/212, And bismuth containing502/213, And Group VIII metal containing (i.e., iron or platinum group)502/214, And silicon containing502/241, Of Group VII (i.e., Mn, Tc or Re)502/242Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)ExaminersPrimary: Thomas, Earl C.Attorney, Agent or FirmInternational ClassesB01J 21/00 (20060101)B01J 21/08 (20060101) B01D 53/94 (20060101) Foreign Application Priority Data1976-04-08 JPAbstractA catalyst for purifying exhaust and waste gases, which consists essentially of(A) 30 to 99% by weight of at least one catalytic oxide selected from a binary oxide comprising titanium and silicon and a ternary oxide comprising Ti, Zr and Si,(B) 1 to 70% by weight of a catalytic oxide comprising at least one element selected from the group consisting of V, W, Mo, U, Cu, Fe, Cr, Mn and Ce, and(C) 0 to 50% by weight of a catalytic oxide comprising at least one element selected from the group consisting of Sn, Zn, Pb, Ti, Zr, Ni, Co, Nb, Ta, P, Br, Bi, Sb, alkali metals, and alkaline earth metals.Other References
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