Recovery of soda values and heat from sodium carbonate crystallizer purge liquors
Patent 4039617 Issued on August 2, 1977. Estimated Expiration Date: 
August 2, 1994. 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 2, 1994. 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 1759361 1853275 1877368 2049249 2161711 3498744 Process for producing sodium carbonate Patent #: 3933977 InventorAssigneeApplicationNo. 05/587583 filed on 06/17/1975US Classes:423/186, Carbonating23/302T, Sodium compounds423/206.2, Alkali carbonate from trona423/421Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Vertiz, O. R.Assistant: Langel, Wayne A. Attorney, Agent or FirmInternational ClassC01D 7/00 (20060101)AbstractSoda values from the crystallizer purge liquor from the process of making sodium carbonate from trona are recovered by cooling the purge liquor to temperature below about 32° C. to effect crystallization of sodium carbonate decahydrate crystals therefrom, and recovering the decahydrate crystals. Optionally, the decahydrate crystals may be heated to convert them to sodium carbonate monohydrate crystals. Sensible heat of the crystallizer purge liquor and/or sensible heat and latent heat of vaporization of the sodium carbonate process crystallizer vapors may be recovered by using it to heat the sodium carbonate decahydrate crystals to convert them to sodium carbonate monohydrate crystals. |
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