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PRODUCING LITHIUM CARBONATE FROM LOW LITHIUM BRINE

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PRODUCING LITHIUM CARBONATE FROM LOW LITHIUM BRINE ( producing-lithium-carbonate-from-low-lithium-brine )

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(12)UnitedStatesPatent Yangetal. (54) METHOD FOR PRODUCING LITHIUM CARBONATE FROM LOW -LITHIUM BRINE BY SEPARATING MAGNESIUM AND ENRICHING LITHIUM (71) Applicant:XIANGTAN UNIVERSITY,Xiangtan (CN) (10)PatentNo.: US10,246,341B2 (45)DateofPatent: Apr.2,2019 (52) U.S.CI. .COID 15/08(2013.01);BOID 1/04 (2013.01);B01D 12/00(2013.01);COIF 5/22 (72) Inventors:LixinYang,Xiangtan(CN);MiFu, Xiangtan(CN);YiWang,Xiangtan (56) CPC .C01D 15/08;CO7F9/1;B01D 12/0 (Continued) ReferencesCited FOREIGNPATENTDOCUMENTS 105152190 *12/2015 2017/045485 * 3/2017 (CN);Hongyu Qi,Xiangtan(CN);Yu Xu,Xiangtan(CN);YaliLiu,Xiangtan (CN);YalinGui,Xiangtan(CN);Jing He,Xiangtan(CN) (73) Asigne:XIANGTANUNIVERSITY,Xiangtan (CN) (*)Notice: Subjecttoanydisclaimer,thetermofthis patent is extended or adjusted under 35 U.S.C.154(b)by0days. (21) Apl.No.:15/789,97 (2)Filed: Oct.21,2017 CN WO (65) PriorPublicationData US2018/04194A1 Feb.15,2018 RelatedU.S.AplicationData *citedbyexaminer PrimaryExaminer—StevenJBos (74)Atorney,Agent,orFirm —Wayne&Ken,LLC; TonyHom (57) ABSTRACT The present invention discloses a method for producing lithium carbonatefrom alow-lithiumbrinebyseparating magnesium andenrichinglithium.Asalt-lakebrineisused asarawmaterialandisconvertedintohalidesaltsthrough dehydrationbyevaporationandseparationbycrystaliza tion;thehalidesaltsaredirectlyextractedusingtrialkyl phosphateoramixtureoftrialkylphosphateandmonohy dric alcohol, and an organic extraction phase as well as remaininghalidesaltsareobtainedaftersolid-liquid sepa ration;reverse extraction isperformed on the organic extrac tion phase to obtain a lithium -rich solution with a low magnesium-to-lithium ratio,and lithium carbonate is obtainedafterconcentrationandremovalofmagnesium by alkalization. The used solid-liquid extraction method is simple with no co-extraction agent used, and a solute distribution drivingforce isstrong,unafectedby phase equilibrium ofthebrineextractionagent.Themassratioof magnesium -to-lithium significantly decreases in the extrac tionphase. 5Claims,1DrawingSheet (63)Continuation of aplication No PCT/CN2016/091672,filedonJul.26,2016. ForeignAplicationPriorityData (30) Sep.18,2015 (CN) (51) Int.Ci. COID 15/00 COID 15/08 .201510621200 (2006.01) (206.01) (Continued) Water Purealkalior causticalkali Sodium carbonate Condensation Solid-liquid separation exten Liquid-liquid eparation Solutionwithlow magneskomtolithiumexto w wwwwwwwwwwwwwwwww RemovaloftxayuresiuL Magnesium byalkalization. i pitanti precipitation US010246341B2 (Continued) (58) FieldofClassificationSearch (2013.01);

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Product and Development Focus for Infinity Turbine

ORC Waste Heat Turbine and ORC System Build Plans: All turbine plans are $10,000 each. This allows you to build a system and then consider licensing for production after you have completed and tested a unit.

Redox Flow Battery Technology: With the advent of the new USA tax credits for producing and selling batteries ($35/kW) we are focussing on a simple flow battery using shipping containers as the modular electrolyte storage units with tax credits up to $140,000 per system.

Our main focus is on the salt battery. This battery can be used for both thermal and electrical storage applications.

We call it the Cogeneration Battery or Cogen Battery.

One project is converting salt (brine) based water conditioners to simultaneously produce power.

In addition, there are many opportunities to extract Lithium from brine (salt lakes, groundwater, and producer water).

Salt water or brine are huge sources for lithium. Most of the worlds lithium is acquired from a brine source. It's even in seawater in a low concentration. Brine is also a byproduct of huge powerplants, which can now use that as an electrolyte and a huge flow battery (which allows storage at the source).

We welcome any business and equipment inquiries, as well as licensing our turbines for manufacturing.

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