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US Patent 4085193 - Catalytic process for reducing nitrogen oxides to nitrogen
US Patent Issued on April 18, 1978
Estimated Patent Expiration Date:
April 18, 1995Estimated 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.
Estimated Patent Expiration Date:
April 18, 1995Estimated 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.AbstractA catalyst compositions for reducing nitrogen oxide comprising, as its chief ingredient, an intimate mixture ofA. titanium (Ti) as component A, withB. at least one metal selected from the group consisting of molybdenum (Mo), tungsten (W), iron (Fe), vanadium (V), nickel (Ni), cobalt (Co), copper (Cu), chromium (Cr), and uranium (U), as component B,in the form of their oxides, and a process for reducing nitrogen oxides to nitrogen, which comprises contacting a gaseous mixture containing nitrogen oxides and molecular oxygen and a reducing gas with aforesaid catalyst compositions at an elevated temperature. | Inventors
AssigneeApplicationNo. 531304 filed on 12/10/1974US Classes:423/239.1, Utilizing solid sorbent, catalyst, or reactant423/351, NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)502/204, And Group VI metal containing (i.e., Cr, Mo, W or Po)502/206, Molybdenum containing502/241, Of Group VII (i.e., Mn, Tc or Re)502/242, Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/306, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/307, Zinc502/309, Titanium containing502/315, Nickel containing502/316, Iron containing502/318, Copper containing502/324, Of manganese502/328, 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)502/335, Of nickel502/336Of ironField of Search423/235, Nitrogen or nitrogenous component423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/213.5, Group VIII element423/351NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)ExaminersPrimary: Vertiz, O. R.Assistant: Wheelock, Eugene T. Attorney, Agent or FirmUS Patent References3230034, 3257163, 3565574, 3615166, 3844980, 3885020, 3892897, 3900428, 3900429, 3903242, 4003711, Apparatus for elimination of nitrogen oxides from combustion waste gasesIssued on: 01/18/1977 Inventor: Hishinuma , et al.4003978, Method for treating ammonia-containing gases Issued on: 01/18/1977 Inventor: Shiraishi , et al.4010238Proces for selective removal of nitrogen oxides from waste gases Issued on: 03/01/1977 Inventor: Shiraishi , et al. International ClassesB01J 008/00C01B 021/00 Foreign Application Priority Data1973-12-12 JA |
