Process for producing sodium carbonate
Patent 3933977 Issued on January 20, 1976. Estimated Expiration Date: 
January 20, 1993. 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.
January 20, 1993. 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 2770524 2780520 2792282 3233983 3628919 3653848 InventorsAssigneeApplicationNo. 05/432467 filed on 01/11/1974US Classes:423/206.2, Alkali carbonate from trona23/302T, Sodium compounds423/302, Nitrogen containing423/421Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Thomas, Earl C.Assistant: Straub, Gary P. International ClassesC01D 7/00 (20060101)C01D 7/12 (20060101) C01D 7/37 (20060101) AbstractThis invention involves a process for producing high bulk density sodium carbonate from crude trona wherein sodium carbonate monohydrate purge streams containing high amounts of organic impurities are passed to an anhydrous crystallizer operated at temperatures above about 109°C wherein anhydrous sodium carbonate crystals are formed having high bulk densities of about 60 to about 80 lbs/ft3. |
| ||||||||||||||
