Urea hydrolysis
Patent 4341640 Issued on July 27, 1982. Estimated Expiration Date: 
November 1, 1999. 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.
November 1, 1999. 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 516154 852487 1488422 3668250 3725210 3729179 3922147 3922222 4089752 InventorAssigneeApplicationNo. 06/090202 filed on 11/01/1979US Classes:210/752, Plural spaced feedings210/774, Including temperature change261/114.1, Overflow baffles564/73, Purification or recovery95/245, By stripping with gas95/264Steam is stripping gasExaminersPrimary: Spitzer, RobertAttorney, Agent or FirmInternational ClassesB01J 10/00 (20060101)B01D 3/22 (20060101) B01D 3/38 (20060101) B01D 3/14 (20060101) B01D 3/34 (20060101) AbstractThe process for the purification of urea containing waste streams is improved by conducting the purification in a vessel having at least one treating zone wherein the urea containing waste stream is both hydrolyzed and stripped of the products of the urea hydrolysis and other impurities found in the waste stream.Other References
Field of SearchPlural spaced feedings |
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