硝酸法制備擬薄水鋁石及其在正丁醇?xì)庀啻呋铣舌绶灾械膽?yīng)用.pdf

1、同濟(jì)大學(xué)碩士學(xué)位論文硝酸法制備擬薄水鋁石及其在正丁醇?xì)庀啻呋铣舌绶灾械膽?yīng)用姓名：方學(xué)兵申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：錢君律伍艷輝20030101間濟(jì)大學(xué)碩士學(xué)拉論文硝酸法制各擬薄水鋁石及其在丁醇?xì)庀嗯_(tái)成噻蝣中的艘用ABSTRACTInthisresearch，theinfluencesoftheconditionofprecipitation，agingandwashingstepsinthepreparationofps

2、eudo—boehmite(PB)werestudiedTheresultindicatesthat(1)thepreparationiskeystepThecrystalformisdecidedbythepHvalueinthepreparationPBwithhighpurityisobtainedwhenthepHvalueisintherangeof6590andtheerystallinityincreaseswithpHv

3、alue；Thetempamtureinpreparationc∞influeacethecrystallinityandporedistributionofPBThePBwithveryiMffrowporediameterdistributionandlargeporevolumeisobtainedabove55℃，andthePBwithgoodmoldingcapabilityisobtainedbelow55“12Theti

4、meofprecipitationandtheconcentrationofsodimnaluminateaffectgrainsizeofPBinsonicextent圓Inagingstep，prongingagingtimeandincreasingtemperaturempropitioustoimprovecrystallinityIfNH4HC03solutionisused鶘agingmediumtheporediamet

5、erwillbeincreased(3)ThecontentofNainPBdecreasestolessthan002％afterPBiswashed4timeswitldi螄liedwaterTheporevolumeofPBcanbeincreasedwhenp翻群organicsolventisused。AccordingtotheaboverulesakindofPBwithgoodcapabilityisobtainedan

6、ditsporediameterporevolumeandsurfaceareais5。8rim，o53ml／g，3700lTl鈍respectivelyandmorethan50％ofporediameteriswithin3—5nmTheintensityporediameterporevolumeandsurfaceareaofthecarrierwhichmadefromtheabovePBare161N／ram，90nm，04

7、5ml／gand2009m魄respectivelyTheporevolumeofdiameterrangedfrom510rimaccountsfornlomthan695／ofthewholevolume。ThecatalystpreparedbythiscarrierisusedinthesynthesisofthiophenewithCHoOHandCS2Thehighestconversionandselectivityrea