DRY METHOD SYNTHESIS OF PURE SILICEOUS FORM OF ZEOLITE ZSM-35

IntroductionZeoliteZSM-35isclassifiedasfcrricritc(FER)t\pc.x'hicllalsoincludesZSM-ZI.ZSM-38andFER.Zeolitesofthist}'pcha\lcrclatit'CI}UlldiscrinlinablcXRDpattcnlswhichindicatetheirsinlilarit\'illst,u.tu,.,I11.Thehighsiliceousfonllsofthesezeolitesarcgcllcra…

DRY METHOD SYNTHESIS OF PURE SILICEOUS FORM OF ZEOLITE ZSM-35

It was the fitst time that pure siliceous zeoilte ZSM-35 wassynthesized from a dry powder system with an adsorbed-state template Thephysical and chemical properties of the sample were charaeterized by meansof XRD. SEM and IR The effcets of temperature and the amount of silieasource alkali. amine and fluoride ions on erystallization and properties ofpure silia ZSM-35 products were diseussed The lattice parameters werefound smaller than those of Al-ZSM-35 svnthesized hydrothermally .butlarger than those of Al-ZAM-35 prepared by the same dry method Variationsm the mole composition of reaction mixture had notable effects on theerystallization of pure silica XSM-35 and the optimal proportion would beNa2O SiO2 EDA = (4~ 10):(60~100) :(5~75) (in mole) The favorablereaction temperature for the synthesis of pure silica ZSM-35 was in therange of 423~453K