硅溶胶稳定性能的影响因素分析

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(421423)1,2,1,1,1,1(1.,730060;2.,841000):,pH,(10050)g/L0.52.0hpH3.89.5,36.0h:;;;;;pH;:TQ330.38+7:B:1009-0045(2009)05-0421-032060,[1],,[2][3],,2(pH7.0),,0,,;pHpH,,,,,pH,,11.1,Al2O390g/L;,SiO2250g/L,,,1.2,,22.1100,150,200g/L,,,11:2009-02-15;:2009-04-20:(1976),,,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(10050)g/L2.2,,,,222,,,,,,,,0.52.0h2.3pHpH,,33pH3,pH(3.8)(9.5),,pH10.4,36.0h;pH3.89.5,,pH6.2,,pH,,pH6.2,,,,,[3-4]2.4,(),444,,,,,Zeta,,H+OH-Stern,Stern,,,Stern,Zeta,3a.,pH22427©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(10050)g/L0.52.0hpH3.89.5,36.0h:[1].FCC[J].,1995,14(3):28-35.[2],.[J].,2006,24(5):403-406.[3].[M].:,2005:65-69.[4],.pH[J].,1995,29(6):326-328.Analysisofinfluencefactorsonsilica-solstabilityLiuJuanjuan1,WangYuanzheng2,SunYanbo1,ZhangZhongdong1,ZhangZhiguo1,HuangXiaoliang1(1.LanzhouPetrochemicalResearchCenter,PetroChina,Lanzhou730060,China;2.TalimuOilFieldPetrochemicalSubsidiaryCompany,Kuerle841000,China)Abstract:Thesilica-sol,akindofcolloidsolu2tion,formedbysilicaparticlesdispersinginwaterisinthermodynamicallyunstablestate.Theinfluencefactorsonsilica-solstabilitywerestudiedsuchaswaterglassconcentration,mixingtime,pHvalueofsystemandlevelsurfaceactiveagent.Theresultsshowedthatundertheappropriateconditionsofwa2terglassconcentrationof(10050)g/L,mixingtimeof0.5-2.0h,systempHvaluebelow3.8orabove9.5,thegelationtimeforsilica-solreached36.0h.Keywords:silica-sol;waterglass;aluminiumsulfate;silica;gelationtime;pHvalue;stabiliy(411)Synthesisandcharacterizationofmesoporous-microporoustitaniumsilicatemolecularsievepreparedinacidandalkalinemediaLiuXiaofei,JingZhigang,YaoWenjun,GeHanqing,WangXueli,NanYang(LanzhouPetrochemicalResearchCenter,PetroChina,Lanzhou730060,China)Abstract:Themesoporous-microporoustitaniumsilicatemolecularsieveweresynthesizedbyadoptingtwo-stephydrothermalprocess.Inthefirststep,thenanoclustercontainingprimaryandsecondarybuild2ingunitsofmesoporoustitaniumsilicateTS-1wassynthesized,andinthesecondstep,thenanoclusterandtemplatecetyltrimethylammoniumbromidewereassembledinacidandalkalinemediarespec2tively.Themesoporous-microporousmolecularsievewerecharacterizedbyusingXRD,BET,IRandUV-Visanalysisinstruments.Theresultsshowedthatthemolecularsievepreparedinalkalinewasongoodlong-rangeorder,itsspecificareas,porevol2umeandmicroporousporevolumewere1300m2/g,1.20cm3/gand0.18cm3/grespectively,andtheprimaryandsecondarybuildingunitsofmesoporoustitaniumsilicateTS-1wereincorporatedintothewallofmesoporousmolecularsieve.Themolecularsievepreparedinacidwasonbadlong-rangeor2der,itsspecificareas,porevolumeandmicroporousporevolumewere1003m2/g,0.60cm3/gand0.21cm3/grespectively,anditwasmixtureofmi2croporoustitaniumsilicateandmesoporoustitaniumsilicate.Keywords:titaniumsilicatemolecularsieve;mi2croporousmolecularsieves;mesoporousmolecularsieves;nanocluster;alkalinemedia;acidmedia;hy2drothermalsynthesis32451