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Patent LITHIUM CHLORIDE CONTAINING BRINE

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Patent LITHIUM CHLORIDE CONTAINING BRINE ( patent-lithium-chloride-containing-brine )

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US 2020/0399137A1 Dec.24,2020 TABLE 3-continued CarbonationReactionofa2.4%byWeightSolutionofLiOH* Exp. ReactionConditions 2 CO2(2LPM,1.9moles) 3 CO2(2LPM,1.5moles)+ 1.2% Li2CO3seds 4 CO2(2LPM,1.25moles)+ 0.6% Li2CO3seds 5 CO2(3LPM,1.3moles)+ 1.2% Li2CO3seds Anaqueouslithiumcontainingsolution(havingacompo sitionthatincluded:3450mg/LLi;and1720mg/LCa)was contactedwiththeextractionsolutioninaratiorangingfrom betwen1:4to4:1foraproximately5minutesinajacketed *Preparedbymixing84glithiumhydroxide(LiOH·H20)in2Lwater. #Overalyieldincludestheamountoflithiumcarbonate/bicarbonatedisolvedinsolution anddepositedinsidethereactorwals. *excesivelycarbonatedandfilteredwithoutconvertingLiHCO3backintoLi2CO3. Example5.RemovalofCalcium,Manganese,and Magnesium [0148] Anextractionsolutionthatincludes30% Cyanex 272inIsoparMwasprepared.Anaqueouslithiumcontain ingsolution(havingacompositionthatincluded:390mg/L Li;1740mg/LCa;5.53mg/LMg;142.5mg/LMn;1.45 mg/LZn;9.1mg/LBa;and1.65mg/LSr)wascontacted withtheextractionsolutioninaratiorangingfrombetween 1:4to4:1foraproximately5minutesinajacketedsolvent extractionveselequipedwithanoverheadstireratabout 75°C.ThepHofthesolutionintheextractionveselwas maintainedatequilibriumatabout4.5throughtheadition ofasodiumhydroxidesolution.Aftermixingtheextraction solutionandtheaqueouslithiumcontainingsolutionis complete,thesolutionisalowedtostandandtheorganic andaqueousphasesareseparated.Analysisoftheresulting organicphasebyICPprovidedtheamountofionsextracted fromtheaqueoussolutionandcapturedbytheextraction compound,forthevariousreactionmixtureareprovidedin Table4,below.Asshown,atthegivenpHandtemperature, selectivityforlithiumisverylow(i.e.,lesthan8%).At ratiosoftheextractionsolution(identifiedinTable4asthe organicsolution)toaqueouslithiumcontainingsolution (identifiedastheaqueoussolution)of2:1andgreater, selectivityforcalciumisgreaterthanabout90%,selectivity formagnesiumisgreaterthanabout80% selectivityfor manganeseisabout10%,andselectivityforzincisabout 50%. TABLE 4 Ratiooforganic aqueoussolutions 1:4 1:2 1:1 2:1 3:1 4:1 1 2 11 20 Li 8 0 Ca 32 60 79 92 Mg 70 82 86 87 Mn 99 100 100 100 Zn 50 49 47 49 49 46 [0150] Themethodsdescribedhereinaresuitableforthe recoveryoflithiumfrombrinesorsolutionshavinglowor highlithiumconcentrations,inaditiontobrinesorsolu tionsthatincludesignificantconcentrationsofotherions, includingmultivalentions. [0151] Asisunderstodintheart,notalequipmentor aparatusesareshowninthefigures.Forexample,oneof skilintheartwouldrecognizethatvariousholdingtanks and/orpumpsmaybeemployedinthepresentmethod. [0152] Thesingularforms“a”,“an”and“the”include pluralreferents,unlesthecontextclearlydictatesother wise. [0153] Optionaloroptionalymeansthatthesubsequently describedeventorcircumstancesmayormaynotoccur.The descriptionincludesinstanceswheretheeventorcircum stance occurs and instances where itdoes not occur. [0154] Rangesmaybeexpresedhereinasfromaboutone particularvalue,and/ortoaboutanotherparticularvalue. Whensucharangeisexpresed,itistobeunderstodthat anotherembodimentisfromtheoneparticularvalueand/or totheotherparticularvalue,alongwithalcombinations withinsaidrange. [015] Throughoutthisaplication,wherepatentsorpub Ba 3 Sr 1 13 21 25 4 26 39 47 Example6.ExtractionofCalcium,Manganese,and Magnesium 6 8 95 96 84 81 99 99 16 Overall Lithium Carbonation CarbonateSolids solventextractionveselequippedwithanoverheadstirer Yield(%)* Recovered(%) atabout90°C.ThepHofthesolutionintheextraction 93% 73% 99% 82% 93% 78% 96% 82% veselwasmaintainedatequilibriumatabout4.5through theaditionofasodiumhydroxidesolution.Aftermixing theextractionsolutionandtheaqueouslithiumcontaining solutioniscomplete,thesolutionisalowedtostandandthe organicandaqueousphasesareseparated.Analysisofthe resultingorganicphasebyICPprovidedtheamountofions extractedfromtheaqueoussolutionandcapturedbythe extractioncompound.AsshowninTable5,atthegivenpH andtemperature,selectivityforlithiumisverylow(i.e.,les than 8% ).As shown in the Table, lithium extraction is minimizedatratiosoftheextractionsolution(identifiedin Table4astheorganicsolution)toaqueouslithiumcontain ingsolution(identifiedastheaqueoussolution)of2:1and lower. At increased ratios, both calcium extraction and lithiumextractionincrease.Magnesiumextractionisatleast about81%,regardlesoftheratiooforganictoaqueous solution,andmanganeseextractionissimilarlyabout10% foralratiosoforganictoaqueoussolution. TABLE 5 Ratiooforganic aqueoussolutions 1:4 1:2 1:1 2:1 3:1 4:1 4 18 33 0 2 13 33 54 licationsarereferenced,thedisclosuresofthesereferences [0149]Inanotherexample,anextractionsolutionthat intheirentiretiesareintendedtobeincorporatedbyrefer includes30%Cyanex272inLinpar1416-Vwasprepared. enceintothisaplication,inordertomorefulydescribethe Li Ca 29 48 63 82 93 96 Mg 81 86 87 88 89 85 Mn 100 100 10 99 100 99 Zn 53 52 53 52 56 56 Ba Sr

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