Method of hydrolyzing urea contained in waste water streams
Patent 4087513 Issued on May 2, 1978. Estimated Expiration Date: 
May 2, 1995. 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.
May 2, 1995. 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 References3826815 InventorApplicationNo. 823883 filed on 08/12/1977US Classes:423/437.1, Carbon dioxide or carbonic acid210/774, Including temperature change423/232, Utilizing carbonate as reactant423/237, Ammonia423/358, From organic material containing nitrogen423/359, From elemental hydrogen and nitrogen564/66, Preparing directly from ammonium carbamate (i.e., from HNH-COO-HHNHH)564/69, With ammonia synthesis564/73Purification or recoveryExaminersPrimary: Thomas, Earl C.Assistant: Roy, Thomas W. Attorney, Agent or FirmInternational ClassesC07C 126/08C01C 001/08 AbstractA process for hydrolyzing urea in waste water streams which comprises introducing a waste water stream containing urea into a carbon dioxide recovery system such as used in connection with the production of ammonia, and therein hydrolyzing substantially all of the urea in the waste water stream. |
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