Process for purifying exhaust gases
October 17, 2015. 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 ReferencesCatalyst for purifying exhaust gas from vehicles Catalyst for the purification of exhaust gases of internal combustion engines Exhaust gas purifying catalyst Exhaust gas oxidation catalyst Exhaust emission catalyst Monolithic catalyst for exhaust gas purification Doubly promoted platinum group metal catalysts for emission control and method for making the catalysts Method and apparatus for reducing NOx in internal combustion engine Sorbent for removing nitrogen oxides, sulfur oxides and hydrogen sulfide from gas streams Catalyst for minimizing the H2 S emissions from automotive exhaust and method of its manufacture Inventors
AssigneeApplicationNo. 544260 filed on 10/17/1995US Classes:423/213.5, Group VIII element423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/239.1Utilizing solid sorbent, catalyst, or reactantExaminersPrimary: Lewis, MichaelAssistant: DiMauro, Peter Attorney, Agent or FirmForeign Patent References
International ClassesB01D 053/94B01D 053/60 Foreign Application Priority Data1993-01-11 JPAbstractA catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.Other References
Field of SearchGroup VIII elementUtilizing as solid sorbent, catalyst, or reactant a material containing a transition element Utilizing solid sorbent, catalyst, or reactant Of platinum group metal and of iron group (i.e., Ru, Rh, Pd, Os, Ir, or Pt and Fe, Co or Ni) And Group I metal containing (i.e., alkali, Ag, Au or Cu) |
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