Soda ash manufacture
Patent 4814151 Issued on March 21, 1989. Estimated Expiration Date: 
July 23, 2007. 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.
July 23, 2007. 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 3260567 3528766 Process for producing sodium carbonate Recovery of soda values and heat from sodium carbonate crystallizer purge liquors Purification of carbonate process solutions Carbon treatment of monohydrate crystallizer liquor Patent #: 4299799 InventorAssigneeApplicationNo. 07/077577 filed on 07/23/1987US Classes:423/206.2, Alkali carbonate from trona23/302T, Sodium compounds423/421Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Straub, Gary P.Attorney, Agent or FirmInternational ClassesC01D 7/00 (20060101)C01D 7/12 (20060101) AbstractAn improved process for the manufacture of soda ash from trona by the sodium carbonate monohydrate method utilizing an activated carbon treatment of evaporator fines bleed. |
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