硅鋁膠改性膨潤(rùn)土的研究.pdf

1、天津大學(xué)碩士學(xué)位論文硅鋁膠改性膨潤(rùn)土的研究姓名：張軍申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：工業(yè)催化指導(dǎo)教師：馬福善2000.1.1Abs仃actAdsoptionofbentonitemodified砸msilicaaluminogelwasperformedtojudgethepossibilityofsilicaaluminogelasamoditierAseriesofmodifiedbentonitewerepreparedindiffere

2、ntratioofSitoA1，anddifferentfeedorderacidityandtemperatureduringthemodifyingprocessAfterthat，akindofcompositebentonitemodified、橢ththegelandHexadecyltrimethylammoiumwerepreparedTheadsorptionofsuchbentoniteforcobaltionsand

3、theeffectofpHvalueofthedispersantonadsorptionwerestudiedConsequentlytheeffectsofsilicaaluminogelonsinkingpropertysurfaceareaandporosityofbentonite，andadsorptionandselectivityfornitriobenzeneanddispersityoforganopilicbent

4、onitewereinvestigatedTheresultsindicatethefollows：Firstlysilica—aluminogelhascombinedonthebentoniteedgesbyhydroxyliccondensationreaction，andthemodificationhasenhancedtheadsorptionofbentoniteforionsandtheresultsareeffecti

5、venotonlyinalkalinemediabutalsoinacidmediaSOsilicaaluminogelCanbreakthelimitsofpHvalueofwaStewaterwhichCanbetreatedwitIlbentoniteSecondly，ratioofSitoA1andfeedorderacidityandtemperatureinthemodilyingprocesshaveaconsiderab

6、leeffectonadsorptionofmodifiedbentonite，andS“Al=2，pH=90andlowtemperatureandhighconcentrationofsilicatearegenerallybenefitformodification，andadsorptionofmodifiedbentoniteforcobaltionsCanbeabove96％byincreasingthegelThirdly

7、silicaaluminogelCanimprovebentomte’SsinkingabilityandenlargeitssurfaceareasandchangeitsporsityFourthlytheadsorptionofcompositebentonite(iesilicaaluminogelorganophilicbentonite)inverylowgelcontentisequivalenttoorganophili

8、cbentonite，whileitsdispersityisgreatlyimprovedFitthlytheselectivityofadsorptionoforganophilicbentonitefororganiccompoundCanbestrikinglyimprovedbyincreasingthesilicaaluminogelcontentofcompositebentoniteKeyWords：bentonite，