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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(11,300131;21;31):,:;;:TQ127.2:A:1006-4990(2002)01-0020-0321,SiO2,,SiO2,,SiO2CO211520nm,,1),,,,,2),100nm,,250500nm3)1520nm,,2,,,,,SiO2,,,,,,SiO2,,,1550nm,,20nm,,,,,,,,,,,,,,,,,,,,,,,,:,,45,,8,281INORGANICCHEMICALSINDUSTRY2002-01,34(1)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(),SiO2,SiO2,SiO2,,,,SiO2SiO2SiO2SiO2,SiO23SiO2,SiO2,3311,,,,,,,720nm312,,,[2],,60,[3],,,,,,,,313,,,,,5100nm,,,,,,SiO2Al2O3TiO2[4]4,;,,,,,,,:411[5],,,,,,,;,,;912002-01,34(1)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[6],,,,,[7]:,AIN,,[6]PA6,5%,:8,10%,115,10%5()1520nm,SiO2SiO2SiO2SiO2,100nm,SiO2SiO2,,,SiO2,:SiO2,,,,,,SiO2:[1]1[M]1,1994.[2]1SiO2[J]1,2000,15(1):38441[3]1SiO2[J]111998,29(2):1311[4]1[J]1,1998,26(2):27281[5]121[J]112000,6(1):151[6]1[J]112001,7(1):1217.[7]1AIN[J].,1998,26(3):3234.(:2001209206)(4)3h,10h,pH5:[1].[M].,1996.252254.[2],,.Co3O4[J].,1999,20(4):519522.[3],,.Co3O4[J].,1991,12(11):14211424.[4],.[J].,1999,35(1):2223.(:2001-07-27)(17):[1]1,1987,(5):1131151[2]1(A)1602122291[3]1[P]1:CN,1131638A1[4]1[J]1,1994,4(8):271227.[5]1Ni[J]1,1994,4(8):357382.[6]VernonPDetal.Catal.Lett.,1990,(6):1811861[7]1[J]1,1994,4(8):278284.[8]HirckmanDAetal.Science,1988,(5):171176.[9]ChoudharyVRetal.CatalLett.,1992,(15):363370.[10]1[J]1,1992,21(18):1471531[11]JonesRHetal.Catal.Lett.,1991,(8):169174.[12]1[M]1:,1981:471472.(:2001207228)02INORGANICCHEMICALSINDUSTRY2002-01,34(1)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(FacultyofChemicalEngineeringandLightIndustry,GuangdongUniversityofTechnology,Guangzhou510090):Chin.J.InorganicChemicalsInd.34(1),2002,pp.34UsingCo(NO3)2andCO(NH2)2asrawmaterials,thenanome2ter-sizedCo3O4waspreparedbyhomogeneousprecipitationmethod.Theinfluencesofreactiontime,rawmaterialsratio,dryingtimeandpHofsolutiononparticlesizewereinvestigated.Theopti2mumconditionsareasfollowing:thepHofsystem:5,reactiontime:3h,CO(NH2)2/Co(NO3)2(mole):4,dryingtime:10h.Theproducthasanaveragediameterof25nmwithgooddispersiveandsphere-shaped.KeyWords:homogeneousprecipitationmethod,nanometer-sizedmaterials,Co3O4,Co(NO3)2,CO(NH2)2PREPARATIONOFDIFFERENTKAOLINSLURRYWITHHIGHSOLIDCONTENT.ZHANGLieqingetal.(ResearchInstituteofChanglingBranch,SINOPEC,Yueyang414012):Chin.J.InorganicChemicalsInd.34(1),2002,pp.57Twotypesofkaolinslurrywithhighsolidcontentwerepre2pared,andeffectsofthedosageofdispersantandpHonthesolidcontenttokaolinslurrywereinvestigated.Theresultsshowthatthekaolinslurrywithhighsolidcontentcanbepreparedbyanionorcationdispersant,theaniontypesystemisalkalinewhilethecationtypesystemisacidic.Theoptimumaddedamountsofdispersantneedtobedeterminedwhentheslurryistobeprepared.Keywords:kaolinslurry,solidcontent,anion,cation,disper2santSTUDYONTHEREACTINGDYNAMICSOFLEACHINGLOW-GRADEROASTEDMOLYBDENITEWITHSODIUMCARBONATESOLUTION.ZHANGYongqiang(EnvironmentalEngineering&ChemicalEngineeringDepartment,YanshanUniversity,Qinhuangdao066004):Chin.J.InorganicChemicalsInd.34(1),2002,pp.89Areactingdynamicshasbeenstudied,whichisaboutthereac2tionofthelow-graderoastedmolybdeniteleachedwithsodiumcar2bonatesolution.Asaresult,itindicatedthattheleachingvelocityisaboutinlinearproportiontothesurfaceareasofthesolidparticlesandthereactinggradeisoneleveltotheconcentrationofsodiumcarbonatesolution,andreactingapparentactivationenergyisabout22.14kJ/molwithinthe6090.Keywords:low-graderoastedmolybdenite,reactingdynam2ics,sodiumcarbonateSTUDYONTHEPREPARATIONOFCHLORINEDIOXIDEFROMSODIUMCHLORATEBYPYRITEREDUCTION.PENGQingjingetal.(DepartmentofEnvironmentalScienceandEngineering,HunanUniversity,Changsha410083):Chin.J.Inor2ganicChemicalsInd.34(1),2002,pp.1011Thetechnologyconditionsofpreparationofchlorinedioxidefromsodiumcholratebypyritereductionwereinvestigated.Thebestreactionconditionisthattheamountofpyriteis6%9%overthe2oreticalamount,thetemperatureisabout60,theinitialconcen2trationofsodiumchlorateis45mol/L,andtheamountofsulfuricacidisover150%oftheoreticalamount.Thismethodhasthead2vantagesofeasycontrolreaction,lessconsumptionofsulfuricacid,cheapcostandhigherpurityoftheproduct.Keywords:chlorinedioxide,sodiumchlorate,pyriteTHERESEARCHONTHEDISPERSALEFFECTOFPRE2CIPITATEDSILICABYULTRASONICWAVES.ZHUHaiqing(WuxiUniversityofLightIndustry,Wuxi214045):Chin.J.InorganicChemicalsInd.34(1),2002,pp.1213Inthisarticle,thedispersaleffectofprecipitatedsilicabyul2trasonicwaveswasresearchedthroughexperiment,thebestsuitablefrequencyandpowerdensitywasfound.Whenthefrequencyis40kHzandthepowerdensityis1.8W/cm2,theoptimumdispersalef2fectofprecipitatedsilicaslurrycanbeobtained.Keywords:ultrasonicwaves,frequency,powerdensity,precip2itatedsilicaTHEPREPARATIONOFHIGHPURITYPOTASSIUMSILVERCYANIDEBYOXYGENBLASTCYANIDATION.ZHOUQuanfaetal.(DepartmentofApplicationC