Process for preparing soda ash from solution mined bicarbonate brines
June 13, 2021. 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 ReferencesRecovery of soda values and heat from sodium carbonate crystallizer purge liquors Recovery of alkali values from salt-containing trona deposits Recovery of sodium carbonate values from contaminated dilute soda ash streams Process for producing sodium salts from brines of sodium ores Process for producing sodium salts from brines of sodium ores Equilibrium production of sodium carbonate from sodium bicarbonate Method for recovery of alkali values from trona using sequential crystallization Solution mining of carbonate/bicarbonate deposits to produce soda ash Production of sodium carbonate from solution mine brine Process for producing sodium salts InventorAssigneeApplicationNo. 880566 filed on 06/13/2001US Classes:423/421, Alkali metal containing (Li, Na, K, Rb, or Cs)423/206.2, Alkali carbonate from trona423/209CarbonatingExaminersPrimary: Bos, StevenAssistant: Kuhar, Anthony Attorney, Agent or FirmInternational ClassC01D 007/12AbstractA method for producing high grade soda ash from a solution mined brine containing sodium bicarbonate by processing the mine brine through a monohydrate crystallization step to the final product is described. The mine brine is treated to decompose and thereby convert sodium bicarbonate to sodium carbonate and to concentrate the sodium carbonate to a concentration such that a feed liquor is formed which is suitable for crystallizing sodium carbonate monohydrate crystals of high purity from the feed liquor. The sodium carbonate monohydrate crystals recovered from the process are converted to soda ash by known techniques. |
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