topo體系萃取分離銠與銥—活化溶劑萃取技術(shù)的研究與應(yīng)用

1、成都理工大學(xué)碩士學(xué)位論文TOPO體系萃取分離銠與銥—活化溶劑萃取技術(shù)的研究與應(yīng)用姓名：馬亮幫申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：范必威20060401成都理工大學(xué)碩士學(xué)位論文AbstractTheseparationandpurificationofrhodiumfromtheotherpreciousmetalsisoneofthemoredifficultareasinpreciousmetalrefining，duemain

2、lytothecomplexsolutionchemistryofrhodiuminchloridesolutionInthispaper，Tin(TI)chloridewasusedaslabilizingreagent，andtheresultsofasystematicstudyonthesolventextractionofrhodiumwithtrinoctylphosphineoxide(TOPO)inaqueoussolu

3、tionofRh(III)～Sn(II)一CI—systembyactivation—solventextractiontechnologyaregivenTheeffectsofthemolarratioofSntoRh，TOPOconcentration，acidity，agingtimeectwereinspectedTheoptimumextractionconditionsareasfollows：theamountofadd

4、edstarmouschlorideisfourtimesthatofRhaccordingtothemolarratioofSnth，thetemperatureofcomplexreaction60C，agingtime1h，phaseratiol：1，theRhpercentageextractionwasover98％Thepercentageofstrippingmayreachto95％throughonestagewitl

5、l4rnol’L1hydrochloricacidcontainingpotassiurnchlorateTheresultsofthisstudyshowthattheextractionofrhodiumCanbeimprovedobservablybythelabilizingprogresswithSnCl2andindicatethefeasibilityofrecoveryandpurificationofrhodiumby

6、activation—solventextractiontechnologyIntheTOPOsystem，activationsolventextractiontechnologywasputforwardtoseparateIr(IV)andRh(IlI)ionsfromamixedchloridesolutionbyextractionofrhodiumNtarmouschloridewasaddedtotheoriginalso

7、lutioncontainingIrCl62一andRhCl6’ionsbeforeextractionIrCl62一WasreducedtoIrCl6’whichcannotbeextractedbyTOPO，andRhCl6’wasreducedtoRh(I)，whichwasfurthercomplexedwithSnCt3一formingabinucleibridgedcomplexanionsoftheform[Rh2Cl(6

8、一n)(SnCls)n]4一rn=24)andwereextractedbyTOPOsimultaneouslyAmixedsolutionofHCIandKCl03inwhichthestrongoxidantchlorinewasproducedwasusedforstrippingtherhodiumDuringthestrippingprocess，bothRh(I)andSnCl3一inthecomplexanionswere

9、oxidizedth(III)andSn(IV)destroyingthestructureofthe[Rh2Cl(6一n)(SnCl3)n]”(n22—4)anions；Rh(1lI)wasstrippedintotheaqueoussolutionTheprocesswasaffectedonlyslightlybythecharacteristichingfrequencyofbetweenlrCl62一andIrCl63一ion

10、s；alittleamountoflrCl62一mightbeextractedbyTOPOinthecourseofextractingrhodiumIrCl624remainedintheorganicphaseexperiencingnochangeinthestrongoxidativeenvironmentcarlbestrippedwithnitricacid，Becauseoftheirhi曲percentextracti