Process of removing hydrogen sulfide from gas mixtures
Patent 4515759 Issued on May 7, 1985. Estimated Expiration Date: 
November 3, 2003. 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.
November 3, 2003. 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 676209 2665190 3754074 Removal of sulfur oxides from gases by scrubbing with ammoniacal solutions Patent #: 4151263 InventorsAssigneeApplicationNo. 06/549274 filed on 11/03/1983US Classes:423/220, Carbon dioxide or hydrogen sulfide component423/223, Utilizing reactant containing arsenic, phosphorus, or boron423/232, Utilizing carbonate as reactant423/576.4By reacting gaseous feed stream with liquid aqueous mixtureExaminersPrimary: Thomas, Earl C.Attorney, Agent or FirmInternational ClassesB01D 53/14 (20060101)B01D 53/14 (20060101) C07C 7/00 (20060101) C07C 7/00 (20060101) C07C 7/148 (20060101) C07C 7/148 (20060101) AbstractProcess for the removal of hydrogen sulfide from gas mixtures, particular gas mixtures containing hydrocarbons, wherein the gas mixture is treated with an aqueous solution of a water soluble nitrite such as sodium nitrite, the pH of the aqueous solution being at least 5.5 or greater.Other References
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