Method of preparing sodium liquors low in calcium
Patent 4151261 Issued on April 24, 1979. Estimated Expiration Date: 
April 24, 1996. 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.
April 24, 1996. 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 References3655331 InventorsAssigneeApplicationNo. 05/587579 filed on 06/17/1975US Classes:423/206.2, Alkali carbonate from trona423/208Water leaching or forming water soluble substanceExaminersPrimary: Vertiz, O. R.Assistant: Langel, Wayne A. Attorney, Agent or FirmInternational ClassC01D 7/00 (20060101)AbstractA method for dissolving calcined trona containing calcareous impurities, to obtain an aqueous sodium carbonate solution having low calcium content involves contacting calcined trona in countercurrent flow, desirably under specific temperature conditions, with dilute sodium carbonate solution. Sodium carbonate solutions thus obtained have reduced tendency to form calcium deposits in processing equipment.Field of SearchWater leaching or forming water soluble substance |
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