Method for the manufacture of crystals of sodium carbonate monohydrate
Patent 4260594 Issued on April 7, 1981. Estimated Expiration Date: 
April 7, 1998. 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 7, 1998. 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 3628919 3842157 3843768 Method for producing alkali carbonate Patent #: 3975503 InventorsAssigneeApplicationNo. 05/890013 filed on 03/24/1978US Classes:423/421, Alkali metal containing (Li, Na, K, Rb, or Cs)23/301, Seed23/302TSodium compoundsExaminersPrimary: Bernstein, Hiram H.Attorney, Agent or FirmInternational ClassesC01D 7/00 (20060101)C01D 7/35 (20060101) Foreign Application Priority Data1977-03-25 FRAbstractMethod for the manufacture of crystals of sodium carbonate monohydrate, comprises crystallizing sodium carbonate monohydrate from a carbonated aqueous liquor of sodium hydroxide above 35° C. and separating the crystals of sodium carbonate monohydrate and a mother liquor. The sodium carbonate monohydrate is crystallized on crystalline seeds of sodium carbonate monohydrate obtained by evaporation, between 35° and 107.5° C., of a solution of sodium carbonate free from sodium hydroxide.Other References
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