Proces for selective removal of nitrogen oxides from waste gases
Patent 4010238 Issued on March 1, 1977. Estimated Expiration Date: 
March 1, 1994. 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.
March 1, 1994. 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 3249558 3279884 3476508 3513109 3615166 3840471 InventorsAssigneeApplicationNo. 452659 filed on 03/19/1974US Classes:423/239.1, Utilizing solid sorbent, catalyst, or reactant423/351, NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)502/209, And vanadium containing502/312, Vanadium containing502/337, Of nickel502/338, Of iron502/343, Of zinc502/345, Of copper502/349, Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/350, Of titanium502/352Of tinExaminersPrimary: Vertiz, O. R.Assistant: Wheelock, Eugene T. Attorney, Agent or FirmForeign Application Priority Data1973-03-26 JAAbstractA process for the selective removal of nitrogen oxides from waste gases containing nitrogen oxides, which comprises contacting the waste gases with a metal oxide catalyst having the following formula:wherein V is vanadium; A is at least one element selected from the group consisting of copper, zinc, tin, lead, titanium, phosphorus, chromium, iron, cobalt and nickel; x and y are each a numeral of 0.5 to 12; and z is a numeral of 1 to 60, at a temperature of 150° to 800° C in the presence of ammonia. |
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