Process for crystallization of anhydrous sodium carbonate
Patent 4183901 Issued on January 15, 1980. Estimated Expiration Date: 
July 24, 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.
July 24, 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 3103413 3656892 3738938 3796794 3836628 3852427 3855397 Process for producing sodium carbonate Patent #: 3933977 InventorsAssigneeApplicationNo. 05/927187 filed on 07/24/1978US Classes:423/206.2, Alkali carbonate from trona23/300, With added material23/302T, Sodium compounds423/265, WITH ADDITIVE423/421Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Vertiz, O. R.Assistant: Straub, Gary P. Attorney, Agent or FirmInternational ClassesC01D 7/00 (20060101)C01D 7/24 (20060101) AbstractAnhydrous sodium carbonate is crystallized from saturated aqueous sodium carbonate solutions at temperatures in the range of 104° to below 109° C. by adding to the solution very small proportions of additives which function to reduce the transition temperature of monohydrate to anhydrous sodium carbonate.Other References
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