Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal
Patent 6077491 Issued on June 20, 2000. Estimated Expiration Date: 
March 21, 2017. 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 21, 2017. 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 ReferencesProcess for purifying urea-containing waste water and process for preparing melamine Process for the recovery of valuable components from the waste streams obtained in the preparation of urea Aqueous ammonia injection scheme Patent #: 5098680 InventorsApplicationNo. 822932 filed on 03/21/1997US Classes:423/235, Nitrogen or nitrogenous component423/239.1, Utilizing solid sorbent, catalyst, or reactant423/358From organic material containing nitrogenExaminersPrimary: Langel, Wayne A.Assistant: DiMauro, Peter Attorney, Agent or FirmForeign Patent References
International ClassB01D 053/56AbstractThis patent describes technology for generating ammonia from urea. The method is based on the hydrolysis of an aqueous solution of urea and/or biuret by heating under pressure to form a mixture of ammonia, carbon dioxide and water. The gas mixtures produced are useful for supplying ammonia at controlled pressure and rate of flow for many industrial applications without the risks and hazards associated with the transportation and on-site storage of ammonia, thereby providing a significant safety advantage over present industrial practice. |
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