Process for treatment of urea plant process condensate
Patent 4552979 Issued on November 12, 1985. Estimated Expiration Date: 
August 27, 2004. 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.
August 27, 2004. 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 3292998 Method for producing a hydrogen-containing gas Urea hydrolysis Patent #: 4341640 InventorAssigneeApplicationNo. 06/644355 filed on 08/27/1984US Classes:564/69, With ammonia synthesis423/359, From elemental hydrogen and nitrogen564/73Purification or recoveryExaminersPrimary: Warren, Charles F.Assistant: Picard, R. A. Attorney, Agent or FirmInternational ClassesC07C 273/02 (20060101)C07C 273/00 (20060101) AbstractA process and apparatus are described which enable urea plant process condensate, which is contaminated with urea and other combined forms of ammonia and carbon dioxide, to be converted substantially completely and on a continuous basis, to a gaseous stream comprising steam, ammonia, carbon dioxide and hydrocarbon gas (introduced in the processing of the condensate). The gaseous stream so recovered is employed as feedstock for use in the reformer of the ammonia plant which supplies ammonia and carbon dioxide feedstocks for the synthetic urea plant from which the treated process condensate was derived. In a preferred embodiment the hydrocarbon fuel gas is natural gas. The process of the invention obviates the environmental and like problems hitherto encountered in the handling of urea plant process condensate and also provides marked advantages including improving the economics of operation of the urea plant and associated ammonia reformer plant.Other References
Field of SearchPurification or recovery |
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