从钼酸盐溶液中分离微量钨的研究进展-豆柴文库

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从钼酸盐溶液中分离微量钨的研究进展
Title:ResearchProgressontheSeparationofTraceTungstenfromMolybdateSolutions
Abstract:
Tungstenisarareandvaluablemetalwidelyusedinvariousindustriesduetoitsexcellentproperties.Theseparationoftracetungstenfrommolybdatesolutionsisofgreatsignificanceformaximizingtheproductionandutilizationofthisimportantresource.Thispaperaimstosummarizetheresearchprogressontheseparationmethodsandtechnologiesoftracetungstenfrommolybdatesolutions.Thepaperdiscussesvariousseparationtechniques,includingsolventextraction,ionexchange,precipitation,andadsorption.Additionally,thechallengesandfutureperspectivesoftheseseparationmethodsarealsoaddressed.
1.Introduction:
Tungstenandmolybdenumarecommonlyfoundtogetherinnatureandareoftenprocessedasby-productsduringtheextractionofoneanother.Tungstenistypicallypresentinmolybdatesolutionsintraceamounts,makingitsseparationatechnicalchallenge.Efficientandselectiveseparationmethodsarerequiredtorecoverthisvaluablemetal.Theresearchprogressontheseparationoftracetungstenfrommolybdatesolutionsisreviewedinthispaper.
2.SolventExtraction:
Solventextractionisawidelyusedtechniquefortheseparationoftracetungstenfrommolybdatesolutions.Organicextractants,suchasamines,phosphonicacids,andphosphates,havebeeninvestigatedfortheirabilitytoselectivelyextracttungsten.ParameterssuchaspH,contacttime,andconcentrationratioshaveasignificantinfluenceontheextractionefficiency.Theoptimizationoftheseparametershasshownpromisingresultsintheseparationoftracetungsten.
3.IonExchange:
Ionexchangehasbeensuccessfullyappliedtotheseparationoftungstenfrommolybdatesolutions.Bothcationandanionexchangeresinshavebeeninvestigatedfortungstenseparation.TheselectivityoftheresinscanbemanipulatedbyadjustingthepHandconcentrationofthesolutions.Dynamicionexchangeprocesseshavealsobeenexploredtoimprovetheseparationefficiency.
4.Precipitation:
Precipitationmethodshavebeendevelopedfortheseparationoftungstenfrommolybdatesolutions.Variousreagents,suchascalciumhydroxide,sodiumhydroxide,andammoniumchlorid