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199737819978310007,,,,.1,4(THF),,,,2.311.8,,,,,,,,,,,1,0.5%,5,,,,,,,(Karlfisehermethod)::10%10,:6+4+150,5,0.IN,:NxVxo.7/G,NV(),G()2.2A:B:,,;,,322.1J141::1%15,,,,47.%,52.85,,2:,63.4C,5%54.9%,(l)+:200,ZooX0.888177.6,177.6X4.9%-8.88,8.88X56/18~27.6,1%27.6x4/522.1200,l(,2.5,3)1,40,,;,,20,,,:1lll222333444555()))l0002222300040006000(%)))2.31555l294441.056660.5836660447333()))888555444333333(%)))0.1035550.07048880.07185550.097800000968000181180178170163A:200+24+3,,0.15%,,180(2)+:B:20050+2,,188(3)+:C:200+30+3,190:,1000.001;.0001,423000/2o/129/70/18.48/(4A)13.2/500,2,50010.21(,0.888/)1997378199782AAABBBCCCttt555.60.99531.90.94526.30.9366.671.23133.01,7678.941.048.341.085.310.377.890.953.203.072.925,,5007,,,,C(),,.................(13),.S():.,1990,9(4):7680XuZ,et.al.,Bull.ehem.soe.JPn1991,64:1658InoueY.,ItohY.,HaohimofoH.,ehem.Lett.,1977,8:885.CO:..1994,15(2):5961Tamaura,Y.,TabataM.,ComPlefereduetionofCar-bondioxidetoearbonusingCationeueessrnagnetite,Nature.1990,346:255257Kiyama,11.,Conditiorsfortheformatiomof(FeJ();)bytheairaxidationofFe(()H)2suspensions,Bull.Chemsoc.JPn,1974,47(7):16461649FengL,Chen5.,PengSApplieationofsurcritiealteehniqueinpreparationofultratineoxidepartieles,ChineseChemiealIetters,1991,2(12):973974StudiesonthedireettransformationsulfurdioxideintosulfurwiththeoxygendefieientmagnetiteWangLiiun(DepartmentofChemistry,YuzhouUniversity,Chongqing630033)AbstraetThereaetionofdeeomposingsulfurdioxideintosulfurwiththeoxygendefieientmagnetite(Fe3O4,0)byH:at573Kwasstudiedanditsrelationstoreaetiontimeandreaetiontemperatureweneinvestigated,respeetively.Theresultsshowthatthelongerthereaetiontime15thelargertheamountofdeeomposingsulfurdioxide;thehigherthereaetiontemperaturehas,themoreaetiveandthefasterspeeditsdeeompositionofsulfurdioxide15.Thetransformationrateofsulfurdioxidedeeomposedintosulfurwiththeoxygendefieientmagnetite15100pereent.Afterreaetion,magnetite(Fe3O;+,a)0)eouldberegen-eratedbyHZatthesameeonditionandbereused.16