Process for removing sulfur oxides and/or nitrogen oxides from waste gas
Patent 4035470 Issued on July 12, 1977. Estimated Expiration Date: 
July 12, 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.
July 12, 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 3023076 3635657 3695828 3773897 3836630 3843771 3906080 3920421 InventorsAssigneeApplicationNo. 05/594754 filed on 07/10/1975US Classes:423/235, Nitrogen or nitrogenous component423/243.07Transition metal or compound thereof reactantExaminersPrimary: Vertiz, O. R.Assistant: Wheelock, Eugene T. Attorney, Agent or FirmInternational ClassB01D 53/34 (20060101)Foreign Application Priority Data1974-11-02 JAAbstractSulfur oxides and/or nitrogen oxides are removed from waste gas containing the same by adding chlorine dioxide or ozone gas to the waste gas in case where nitrogen monoxide is contained in the waste gas, and by scrubbing the waste gas with an aqueous scrubbing solution containing the sulfite of alkali metals or ammonium and oxidation retardant consisting of the sulfide, polysulfide or thiosulfate, of alkali metals or ammonium and thiourea. |
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