Process for the in-line hydrolysis of urea
August 31, 2010. 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 3900554 Method of hydrolyzing urea contained in waste water streams Process for abating concentration of nitrogen oxides in combustion flue gas Catalytic method for hydrolyzing urea Urea reduction of NOx in combustion effluents Urea reduction of NOx in fuel rich combustion effluents Multi-stage process for reducing the concentration of pollutants in an effluent Process for nitrogen oxides reduction and minimization of the production of other pollutants Process for the reduction of the nitrogen oxides in exhaust gases using a zeolite-containing catalyst Patent #: 4946659 InventorsAssigneeApplicationNo. 561154 filed on 08/01/1990US Classes:423/235, Nitrogen or nitrogenous component423/358From organic material containing nitrogenExaminersPrimary: Heller, Gregory A.Attorney, Agent or FirmForeign Patent References
International ClassC01B 021/00AbstractThe present invention relates to a process for the in-line hydrolysis of urea. More particularly, the process involves heating an aqueous solution of urea while flowing through a conduit to a temperature and for a time effective to hydrolyze urea to produce hydrolysis products comprising ammonium carbamate, ammonium carbonate, ammonium bicarbonate, and ammonia. The hydrolysis products are useful for the reduction of nitrogen oxides in combustion effluents without the generation of substantial amounts of nitrous oxide. |
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