氟硅酸溶液中氟硅酸及氢氟酸含量的测定

(410007),,O655TheDeterminationofFluosilicicAcidandHydrocyanicAcidintheSolutionofFluosilicicAcidWuZongheZuoXiaojuan(HunanCentreofAnalysisandTestChangsha410007)Abstractcontinuouslydeterminingmethodoffluosilicicacidandhydro2cyanicacidbyalkalititrationhasbeendevelopedtosolvedifferentacidspresentinthesolutionduetotheprecipitateofpotassiumflousiliciateanditshytrolysis.Thesimpleandcorrectmethodhasbeenusedinproductionwithsatisfactoryresults.Keywordsfluosilicicacidhydrocyanicacidalkalititration,,,(),,,,(),11.11.1.1,,,1.1.2250ml25mlCO2,,OC,,,1.21.2.1,,,(1)27219976HUNANCHEMICALINDUSTRYVol.27No2June19971KCl(g)KCl(%)H2SiF6(g)H2SiF6(%)KClH2SiF6H2SiF6(%)13280.2501875.5234160.25011684.0336240.25012496.447280.25012898.858320.25013299.2610400.25014099.6712480.25014899.687.5300.0250.130095.097.5300.1250.56098.5107.5300.25013099.8117.5300.50021599.83KCl1:,211,22,11(),,0.125g(0.5%),,,;0.2500.500g(2%),(0.5g):,,0.5%1.2.2,(0.250g),,(2)2+H2SiF6%99.597.5108.299.4102.0PH8.210.06.17.56.88.07.27.47.67.39.12:,,pHNaOH-HFpH,,50200ml,,100ml,,,7090C,8527,,15min,,60min(60min),,2030min1.2.3,(),:60mgAl,15mgFe,125mgP,20mgCu,Pb,Zn,50mgBa,4mgThO230mgW,,,,1.2.4,(H2SiF610.00%,HF1.00%),,343H2SiF6(%)H2SiF6(mg)(mg)H2SiF6(%)28.00100.0100.0103.0100.0103.0200197.2198.498.699.215.80100.0102.8101.0102.8101.0200.0194.4199.097.299.54HF(%)HF(mg)(HFmg)HF(%)1.4410.0010.5010.21105.0102.120.0019.6020.0098.0100.00.5510.0011.0010.30110.0103.020.0019.7019.4098.597.034:(97%103%,97%110%),,11,528.41%16.45%,0.1870.190,0.66%1.2%1.50%0.56%,0.0650.060,4.3%11%5(%)(%)113H2SiF628.410.1870.66HF1.500.0654.3165H2SiF616.450.1901.2HF0.560.0601122.10,2H+,:H2SiF6+2KClK2SiF6y+2HCl2NaOH+HF+HClNaF+NaCl+2H2O,,,:K2SiF6+3H2OH2SiO3+4HF+2KFNaOH+HFNaF+H2O2.2:C(NaOH)0.25mol/LGB60188,:,0.1g,40ml,50ml,,200ml,,2.378g250ml,25mlCO2,(H2SiF60.250.30g),0952:(2030min)(1000ml),46,(15S)V1ml250ml,100ml,,23,(15S)V2ml()2.4(H2SiF6)%=CV20.0360m100(HF)%=C(V1-V22)0.0200m100:V10ml;V2ml;Cmol/l;0.0361.00mlC(NaOH)=1.000mol/L;0.02001.00mlC(NaOH)=1.000mol/L;mg(V1-V22)K2SiF64H+,H2SiF64H+0H2SiF6K2SiF6,2H+,,(V1-V22)ml:0,3,,,,1YB594652:,19703()19884:,1971:1996125(34)4.225%-,,,29678.5/t,,1350g/hm2,40.5,14,4.2/t,500t300-400,,:199610280627