Process for ammonia production through urea hydrolysis
Patent 5985224 Issued on November 16, 1999. Estimated Expiration Date: 
September 24, 2018. 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.
September 24, 2018. 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 ReferencesMethod of hydrolyzing urea contained in waste water streams Process for the in-line hydrolysis of urea Patent #: 5240688 InventorApplicationNo. 160429 filed on 09/24/1998US Classes:423/235, Nitrogen or nitrogenous component423/358From organic material containing nitrogenExaminersPrimary: Langel, Wayne A.Assistant: Medina-Sanabria, Maribel Attorney, Agent or FirmInternational ClassesC01C 001/08C01B 021/00 Foreign Application Priority Data1998-05-25 ITAbstractAn improved process for combustion flue gas conditioning in which ammonia is injected into a stream of said combustion flue gas, wherein urea is dissolved in water, forming a dissolved urea solution. The dissolved urea solution is heated and pressurized and the dissolved urea therein hydrolyzed, forming ammonia and carbon dioxide. The ammonia and carbon dioxide are then stripped from the resulting hydrolysis solution and injected into the stream of combustion flue gas to be treated. Water from the stripped hydrolysis solution is then recycled for use in dissolving fresh urea. |
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