Process for recovering lithium from salt brines
Patent 4723962 Issued on February 9, 1988. Estimated Expiration Date: 
June 5, 2006. 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.
June 5, 2006. 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 876851 1623513 3268289 3306700 3537813 Process for the production of high purity lithium hydroxide Process for solar concentration of lithium chloride brine Production of highly pure lithium chloride from impure brines Process for purification of lithium chloride Process for recovering lithium from brine by salting out lithium sulfate monohydrate Patent #: 4287163 InventorAssigneeApplicationNo. 06/873099 filed on 06/05/1986US Classes:23/302R, Alkali metal and ammonium compounds23/295R, Crystallization23/295S, Solar23/296, Selective23/298, From natural sources23/300, With added material23/304, Alkaline earth metal and magnesium compounds423/179.5, Lithium423/551Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Metz, Andrew H.Assistant: Pak, Chung K. Attorney, Agent or FirmInternational ClassesC01D 15/00 (20060101)C01D 15/06 (20060101) C22B 26/00 (20060101) C22B 26/12 (20060101) AbstractAn improved process is described for recovering lithium from evaporatively concentrated brines. Epsom salt recovered from the brine at about 0° C. is added to the concentrated lithium-containing brine, so as to precipitate lithium sulfate monohydrate, the brine having previously been subjected to the sequential steps of two stage chilling, evaporative concentration, further chilling and vacuum evaporation.Other References
|
| ||||||||||||||
