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US 8,691,169B2 78 temperaturebetween0and30°C.Thelithiumcarbonatecake 5 is then added to reactor 2 which is a conventional reactor havingaconventionalstirer3,andinwhichcarbondioxide 6isinjectedatapressureof1to5atmospheresthroughthe useofaconventionaldifuser26,suchasaperforatedplateor aporousplate,forareactiontimefrom1to120minutesso that the carbon dioxide becomes dissolved and forms car bonicacidwhichcontinuestoreactwiththedissolvedlithium % carbonatetoformbicarbonateoflithium,moresolublethan lithiumcarbonate,inaccordancewithformula(7),untilthe concentrationofbicarbonateoflithiuminSolutionreachesa valueofbetween1to58g/L. Oncethecapacitytodisolvethebicarbonateoflithiumis sitionoftheresultantbrineinpresentedinTable6. reached(saturationlevels),forexample,52g/Lat15°C.,the 15 lithiumcarbonatecakeiswashedwith 1ormorevolumesof demineralizedwater27atatemperaturerangingfrom50to40 95°C.Boththefiltrateandthewaterusedinwashing17are senttoSolarevaporationpoolsforconcentrationandSubse quentrecuperationofthelithium.Thelithiumcarbonatecake 18issenttoadryingstageatatemperaturerangingfrom100 to250°C.foradryingtimerangingfrom1to120minutesin45 aconventionalindirectheater. Gaseouscarbondioxide28generatedduringthebreak down ofbicarbonateoflithiuminreactor2 isdirectedtoa 0.004% residualboron. Theloadedorganicphasewasthentreatedwitha0.25 molarSodiumhydroxidealkalineSolutionusinganorganic/ aqueousratioof3/1inthrere-extractionstepseachlasting5 minutesfollowedbyan8minutephaseseparationperiodfor eachstep.Thealkalinesolution,containing1.36%boronwas senttotheSolarevaporationpoolsandtheborondepletes organicphasewasrecirculatedintotheproces. Theborondepletedbrinewassubsequentlytreatedwitha 25%byweightsodaash(Na,CO)solutionwhilemaintain ingthepHat10.5andthetemperatureat90to95°C.fora reactiontimeof50minutes.Theresultantpulpwasthickened underheat,85to90°C.,andthenthethickenedpulpwas filteredunderheatat80to85°C.usingafilterpres.The lithiumcarbonatecakeproducedwasthenwashedinthefilter with 2 volumes of demineralized water at 95°C. 10 solutioncontainingthebicarbonateoflithium7isfiltered withafilterpresorotherconventionalfiltertoremove insolubleimpurities9whichcanthenbediscarded. Filtrate10,containingthebicarbonateoflithium,iscon tinuouslyaccumulatedinaconventionalstoragetank1. Oncesolution7hasbeenfiltered,thefilteredsolution12is Li C Na K Ca Mg SO B HO transferedfromstoragetank11toreactor2.Anyvaporor otherheatingfluidissenttoaconventionalheatexchanger13 locatedintheinteriorofreactor2foraperiodoftimeranging 25 from 1 to 120 minutes in order to heat the bicarbonate of lithiumsolutiontoatemperaturerangingfrom50to100°C. inordertodecomposethebicarbonateoflithiumtolithium carbonateinaccordancewithreaction(8),giventhatbicar bonateoflithiumisunstableattemperaturesabove50°C.30 breakingdownandgeneratingcarbondioxideandprecipitat ingpurifiedlithiumcarbonate.Presureinsidereactor2is maintainedat1to5atmospheresforaperiodoftimeranging volumeoftheextractantand80%byvolumeofthesolvent. from 1 to 120 minutes. Thebrineunderwentfourextractionstepsusinganorganic/ Theresultantpulp15ismaintainedatatemperaturerang35 brineratioof4/1for4minutesineachstepandallowing ingfrom50to95°C.andisfilteredatthattemperatureina phaseseparationtoproceedfor15minutesineachstep.The conventionalfilter16,suchasafilterpres,whereinthe resultantbrineafterthesolventextractionstepscontained conventionalcondenserinordertocondensewatergenerated duringsaidbreakdownofbicarbonateoflithiuminaccor50 dancewithformula(8).Condensedwater21maybedis carded;andcarbondioxide22,separatedinthecoolersec tion, may be recirculated to the pressurized tank 23. Additionalwatercariedbythegas25maybedrainedocca sionalyfromtank23.Additionalcarbondioxide40mayalso55 bedirectedtotank23inordertomaintainthebalanceofmass cakewasthencontinuouslyfedviaarotatingstarsealvalve andtocompensateforanylosesofgas. EXAMPLE OF AN EMBODIMENT OF THE INVENTION intoatank,whichhadastirer,filedwithdemineralized waterat10°C.throughwhichcarbondioxidewasbubbled usingapressurizedstoragetankconnectedtoametalicgas 60 diffuserlocatedatthebottomofthereactiontankinorderto formcarbonicacid.Thepressurewiththereactiontankwas maintainedat1.5atmospheresandthereactionwasallowed toproceeduntilthebicarbonateoflithiumsolutionreached AconcentratedbrineobtainedfromtheSalardeCauchari, Argentina,havingachemicalcompositionasdescribedin 52g/L.Thebicarbonateoflithiumsolutionwasthenfiltered Table5wastreatedwithsaturatedlime(Ca(OH))while65 usingapresfilterandtheclearfiltratewascontinuously maintainingthepHat1andatatemperatureof10°C.for30 collectedinacollectiontank.Oncethebicarbonateoflithium minutes. solution was filtered itwas then re-fed into the reaction tank TABLE 5 ChemicalcompositionofconcentratedbrineobtainedfromtheSalarde Cauchari Element Li C Na K Ca Mg SO B HO 0.410 12.810 S.423 2.721 2.482 9.931 S.936 O.445 SS.423 Thelimetreatedbrinewassubsequentlyconcentratedin solarevaporationpoolswhereuponMg(OH),CaSO4.5H2O andCaBO.6HOwerecrystalized.Thechemicalcompo TABLE 6 ChemicalcompositionofconcentratedlimetreatedbrinefromtheSalar deCauchari Element % 0.719 14.220 2.856 4.199 O.O16 O.OO8 2.967 O.698 74.183 ThebrinedescribedinTable6,havingaboroncontentof 0.698%byweightwastreatedwith25%byweighthydro chloricacidinordertomaintainthepHofthebrineatavalue of4.Thebrinewasthensubjectedtoasolventextraction using85%byvolumeiso-octylicacidand15%byvolume tributylphosphateasaphasemodifier,dissolvedinthecom mercialaromaticsolventEscaid100inaratioof20%by Boththefiltrateandthewaterusedinwashingwerethen senttothesolarevaporationpoolswhilethelithiumcarbonatePDF Image | Patent Production of Li from Industrial Brine
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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.| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |