Catalyst for catalytic reduction of nitrogen oxide
Patent 5380692 Issued on January 10, 1995. Estimated Expiration Date: 
September 11, 2012. 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.
September 11, 2012. 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 3884837 3926854 Catalyst Catalytic perovskites on perovskite supports and process for preparing them Catalysts Catalysts for converting reductive and oxidative gases in exhaust gases into innoxious gases Catalyst and method for its manufacture Patent #: 5093301 Inventors
Assignee
ApplicationNo. 944106 filed on 09/11/1992US Classes:502/303, Lanthanum502/241, Of Group VII (i.e., Mn, Tc or Re)502/242, Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/243, Of Group I (i.e., Alkali, Ag, Au or Cu)502/244, Of copper502/245, And group VIII metal containing (i.e., iron or platinum group)502/246, Of Group V (i.e., V, Nb, Ta, As, Sb or Bi)502/247, Of vanadium502/248, And Group VI metal (i.e., Cr, Mo., W or Po)502/250, Of Group II (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/251, Magnesium502/252, And Group VIII metal containing (i.e., iron or platinum group)502/253, Of zinc, cadmium, or mercury502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/304, Cerium502/306, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/307, Zinc502/308, And Group IV metal containing (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/309, Titanium containing502/312, Vanadium containing502/313, And Group VIII metal containing (i.e., iron or platinum group)502/314, Iron group metal and Group III metal containing (i.e., Fe, Co or Ni and Sc, Y, Al, Ga, In or Tl)502/315, Nickel containing502/316, Iron containing502/317, And Group I containing (i.e., alkali, Ag, Au or Cu)502/318, Copper containing502/324, Of manganese502/327, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/328, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/329, Zinc containing502/330, And Group I metal containing (i.e., alkali, Ag, Au or Cu)502/331, Copper containing502/332, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/334, Of platinum502/335, Of nickel502/336, Of iron502/341, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/342, Of zinc502/346, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/348, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/349, Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/350, Of titanium502/351, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/354, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or T1)502/525PEROVSKITEExaminersPrimary: Lieberman, PaulAssistant: McGinty, Douglas J. Attorney, Agent or FirmForeign Patent References
International ClassesB01J 021/04B01J 021/06 B01J 021/12 B01J 023/58 B01J 023/60 B01J 023/66 B01J 023/76 B01J 035/02 253 243 324 349 350 351 307 308 309 312 313 314 315 316 317 318 327 330 331 333 334 335 336 342 346 348 351 349 354 Foreign Application Priority Data1991-09-12 JPAbstractA catalyst for catalytic reduction of nitrogen oxide using at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound is described, which includes an oxide represented by formula (V):A5x B33-x C43 O7 (V)wherein A5 represents at least one element selected from the group consisting of La, Y, Ce, Pr, Nd, Sm, Eu, and Gd; B3 represents at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Pb, Zn, and Ag; C4 represents at least one element selected from the group consisting of Mn, Co, Fe, Ni, Cr, Cu, V, Mo, W, Ti, Zr, Nb, Pd, Rh, Ru, and Pt; and x is a number of from 0 to 1, supported on a solid acid carrier. Also, methods for catalytic reduction of nitrogen oxide are described including reacting nitrogen oxide with at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound in the presence of oxygen and a specific catalyst.Field of SearchLanthanumCerium Of lanthanide series (i.e., atomic number 57 to 71 inclusive) PEROVSKITE And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl) And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg) And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl) Zinc containing And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg) Of Group VII (i.e., Mn, Tc or Re) Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb) Of copper And group VIII metal containing (i.e., iron or platinum group) Of Group V (i.e., V, Nb, Ta, As, Sb or Bi) Of vanadium And Group VI metal (i.e., Cr, Mo., W or Po) Of Group II (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg) Magnesium And Group VIII metal containing (i.e., iron or platinum group) |
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