氟硅酸法制氟化氢铵联产优质白炭黑工艺研究

(,454191):,,;,pH,,,,,,,:;;;:TQ113.79:A:1006-4990(2010)01-0055-02Studyontechnologyofco-preparingammoniumbifluorideandsilicawhitebyfluorosilicicacidprocessZhangMei(Do-fluorideChemicalsCo.,Ltd.,Jiaozuo454191,China)Abstract:Anewmanufacturingtechnologyofammoniumbifluoridewasstudied.Fluorosilicicacid,whichisaby-prod2uctintheproductionofphosphatefertilizerswasadoptedtoreactwithammonialiquor,andthentherunnypasteofsilicaandthesolutionofammoniumfluoridewereobtainedafterseparationandfiltering.Rinsedanddesiccated,silicawhitewasobtainedfromrunnypaste.ThroughintroducinganhydroushydrofluoricacidintoammoniumfluoridesolutionandcontrollingpHatacertainvalue,ammoniumbifluorideslurrywasprepared.Filteringtheslurryandthefinalammoniumbifluorideprod2uctcouldbepreparedbyvacuumdryingthefiltercakeatlowtemperature.Ammoniumbifluorideproducedbythistechnolo2gyhasthefeaturesoflowcostandeffectiveutilizationofresourcesbecauseitadoptedby-productfluorosilicicacidasrawmaterial.Furthermore,theproductshavehighqualityandaccordwithrelevantindustrystandards.Keywords:ammonialiquor;fluorosilicicacid;silicawhite;ammoniumbifluoride,,,,,,(),,,,,,,,[1-4],,11.1:w(H2SiF6)40%,w(HF)4%;:w(NH3)20%,()0.3g/L,80;:w(HF)99.95%,w()0.03%,w(H2SO4)0.004%,w(H2SiF6)0.010%,w(SO2)0.004%,w(As)210-51.2,;,,,,;,,5542120101INORGANICCHEMICALSINDUSTRY,:H2SiF6+6NH3H2O+nH2O6NH4F+SiO2nH2O+4H2ONH4F+HFNH4HF21.3:1):,2):,3050,,pH710,,1530min60853):,,,4):,5):,,6):,7):3,1.41),2),3),,,,pH,,,,4)80,1.511/(t-1)/t/(10mol/L)5800.89516.2(100%)30000.4201260.0(100%)98000.3583508.45284.6:1t175kg(4800/t,840)1.622w(SiO2)/%w()/%(105,2h)w()/%(1000,2h)904.08.03.06.0904.85.23.14.2HG/T30631999HG/T30621999HG/T30651999HG/T30661999pHBET/(m2g-1)DBP/(cm3g-1)/(mgkg-1)6.07.52002602.83.55008.910.02102603.04.4300HG/T30671999HG/T30731999HG/T30721999HG/T3070199933%w(NH4HF2)w()w()w[(NH4)2SiF6]w(SO2-4)95.05.00.24.00.195.01.00.100.500.1:HG/T358619992,,,,,,,:[1],,,.[J].,2007,39(5):8-9.[2],,,.[J].,2006,38(2):36-39.[3],,.[J].,2009,41(1):55-56.[4],.[J].,2004(1):1-4.:2009-08-13:(1973),,,:[e-mail]65421