Soda ash production
Patent 5043149 Issued on August 27, 1991. Estimated Expiration Date: 
August 29, 2010. 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 29, 2010. 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 3050290 3655331 3792902 Treatment of sodium carbonate crystallizer mother liquors Recovery of soda values from sodium carbonate crystallizer purge liquors Recovery of alkali values from trona deposits Recovery of alkali values from salt-containing trona deposits Patent #: 4401635 InventorsAssigneeApplicationNo. 574837 filed on 08/29/1990US Classes:423/206.2, Alkali carbonate from trona23/302TSodium compoundsExaminersPrimary: Morris, TheodoreAssistant: Squillante, Edward Attorney, Agent or FirmInternational ClassC22B 026/10AbstractProcess for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste solutions of sodium carbonate and/or sodium bicarbonate, pumping the slurry into a well connected to an underground mined-out cavity with sufficient pressure to prevent build-up of tailings from plugging the bottom of the well opening, dispersing and settling said tailings in the cavity, removing a liquor from said cavity whose concentration of sodium carbonate and/or sodium bicarbonate has been increased and recovering such enriched liquor for use in the manufacture of sodium-containing chemicals such as soda ash.Field of SearchSodium compounds |
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