佛尔哈德法测定复混肥料中氯离子的含量

朱涛李崇明(上海化工研究院200062)(黑龙江爱农复合肥料有限公司肇东151100)对氯离子含量测定方法进行了研究,通过试验确定佛尔哈德法作为氯离子含量的测定方法,并用邻苯二甲酸二丁酯代替硝基苯包裹沉淀取得了很好的试验效果该方法还减少了试剂的毒害,提高了操作的安全性,已被纳入复混肥料新国家标准复混肥料氯离子含量测定佛尔哈德法,2700,10%1994,,,,,131.1[1]0.01~75mg,Ag+1.2[1,2]0.01~80mg,SO2-4SO2-3S2O2-3S2-NH+4F-PO3-4NO-2CN-CNS-[Fe(CN)6]3-[Fe(CN)6]4-,,1.3(1)[3,4]Ag+CrO2-4(2)[3],,(3)[3~9],,,Ag+,;,;(-),,;,,Ag+,,22.1,,,2.2(1);(2)1+1;23291(3)0.05mol/L:8.7g,,1000mL,;(4)1mg/mL:1.6487g270~300e,,1000mL,,,;(5)80g/L:8.0g75mL,,,,100mL;(6)0.05mol/L:3.8g,1000mL2.325.0mL250mL,5mL25.0mL,,5mL,,100mL,2mL,,c:c=m10.03545@(V0-V1):V0)))(25.0mL),mL;V1))),mL;m1))),g;0.03545)))1.00mL[c(AgNO3)=1.000mol/L],g31~10g(0.001g,1)250mL,100mL,,10min,,250mL,,,1(%)55~2525(g)10~55~11(25mg)250mL,5mL25.0mL,,5mL,100mL,2mL,,x:x=(V0-V2)#c@0.03545m2@D@100%:V0)))(25.0mL),mL;V2))),mL;c))),mol/L;m2))),g;D)));0.03545)))1.00mL[c(AgNO3)=1.000mol/L],g44.10.2%~40.0%,,()()2,1~4,01~03,221()2()3()4()01()02()03()4.224291,,10min33(%)5min10min30min10.260.280.310.320.300.330.320.3322.432.612.682.752.832.892.802.8634.794.635.645.705.845.915.865.89427.4227.7530.3230.3930.5730.4930.6730.624.3,Ag+Cl-AgCl,,,Ag+AgSCN,,Ag+,SCN-,SCN-Fe3+Fe(SCN)3,:Ag++Cl-=AgCl|()Ag+()+SCN-=AgSCN|()Fe3++SCN-=Fe(SCN)3()Fe(SCN)3AgSCN,,AgSCN,SCN-,,AgClAgSCNAg+,Ag+,SCN-,,Ag+,,,,:AgCl|+SCN-=AgSCN|+Cl-,,,,,:,,,,,,,AgClSCN-,,,,,44(%)10.330.350.020.300.330.0322.652.810.162.832.890.0635.575.740.175.845.910.07429.8630.240.3830.6530.490.1655.1,5(mg)(mg)(mg)(mg)(%)(%)13.420.023.319.999.5215.315.030.214.999.3317.615.032.414.898.7419.210.029.310.1101.099.625291,(5)5.2,,62,,,5.3,62(%)10.340.320.330.020.300.330.320.0322.712.662.680.052.832.892.860.0635.755.745.740.015.845.915.880.07430.9330.7730.850.1630.6530.4930.570.16,,77(%)01#02#03#()0.540.510.520.0326.3326.4626.400.1337.6437.8037.720.160.560.560.560.560.560.0026.2026.4726.5026.4926.420.3038.0338.0237.7737.9837.950.260.600.630.620.0326.4826.4826.480.0037.6737.7537.710.080.560.560.560.0026.2726.4926.380.1837.9637.7137.840.250.510.510.510.510.0026.6526.5726.9626.610.0837.9337.7337.6937.830.200.100.230.246,,,,1.GB3050~3051-822.HG/T3279,19903.():4..5.BS1016:part8,19776.GB3558-837))).ZBG20008-878.HG/T3589-19999.AOAC,1984(收稿日期2001-09-04)26291andpriceofsometypicalstainlesssteelproductsforwe-tprocessphospho-ricacid.Somebasicprinciplesarediscussedforthechoiceofstainlesssteelproductsforwe-tprocessphosphoricacid,andsomeimportantsug-gestionsforreferenceanddateareofferedtopersonnelrelatedtodesign,productionandequipmentmanufactureinthefieldofwe-tprocessphospho-ricacid.Keywordswe-tprocessphosphoricacidstainlesssteelproper-tiespricePresentStatusofExpansionofYellowPhosphorusIndustryinChinaChenShanjiAbstractApresentationisgivenofthecharacteristicsoftheyellowphosphorusproductionprocessinChinaanditstechnicalprogress.Newrealmsofdevelopmentofyellowphosphorusareproposed,viz.,thepro-ductionoffinephosphoruschemicalssuchasultra-high-purityyellowphosphorus,high-purityphosphoricacidandphosphoruspentasulfide,tomeetdomesticandforeignmarketdemands.Thecurrentproblemsareprobed,andsuggestionsaregivenontheexpansionoftheyellowphospho-rusindustry.KeywordsyellowphosphoruspresentstausexpansionEffectofPlatinumGauzeConfigurationandCompositiononNitricAcidProductionunderMediumandHighPressureWangLiushuanAbstractTheconfigurationandcompositionofplatinumgauze,thecatalystusedintheproductionofnitricacid,anditseffectonthecatalyticperformancearepresented,anditispointedoutinlinewiththeactualconditionthatadua-lcomponentknittedgauzeshouldbechosenfornitricacidunitsundermediumandhighpressure.Keywordsplatinumgauzeconfigurationcompositionperfor-manceStudyofViscosityofUrea-SulfuricAcidSolutionWangGuanglong,HouCuihongandZhangBaolinAbstractTheviscosityofurea-sulfuricacidsolutionisdeterminedatdifferentratiosandtemperatures,anditisfoundthatitsvalueisfargreaterthanthatofsulfuricacid.Ananalysisandexplanationaregivenofthephenomenonthattheviscosityofurea-sulfuricacidsolutiondoesnotincreasewithanincreaseinureacontentbutvariesmonotonouslyasviewedfromthemechanismofformationoftheadduct.Theparametersintheviscosity-temperatureequationobtainedbyregressionaredependentontheratioandhaveaconcretephysicalsignificance,therebyprovidingabasisforthefurtherstudyandindustrialpracticeofthenewprocessfortheproductionofurea-superphosphatecompoundfertilizer.Keywordsviscosityurea-sulfuricacidsuperphosphatestudyAnalysisofFeasibilityofNitrophosphateProductionbyAmmoniumSulfateRecycleShiZhaozhong,HanGuobangandZhaiJianhuaAbstractThemixedacidprocessandtheammoniumsulfaterecy-cleprocessfornitrophosphateproductionarecomparedandanalyzed.Inthelatterprocesszerodischargeofwasteresidueandwastewaterisrea-lized,therebyreducingthenitrophosphateproductioncost.Also,anex-perimentiscarriedoutontheammoniumsulfaterecycleprocess,andap-propriateprocessconditionsareputforward.Keywordsnitrophosphatemixedacidprocessammoniumsu-lfaterecycleDeterminationofChlorineIonContentinCompoundFertilizersbyVolhardMethodZhuTaoandLiChongmingAbstractThemethodsarestudiedforthedeterminationofthechlorineioncontent.ThroughexperimentsitisdecidedtousetheVo