Mesoporous ZSM-12 zeolite was prepared by dual template in-situ method, desilication in alkaline medium and zeolite as silica source method. 本文分别用双模板剂原位合成法、碱脱硅改性法和微孔沸石硅源法合成了具有介孔结构的ZSM-12分子筛,并采用XRD,XRF,N2物理吸附,27Al NMR,29Si NMR,SEM,TEM,TG,...
MANUFACTURE OF ZEOLITE ZSM-12OF THE DISCLOSURE A method of preparing a highly siliceous zeolite ZSM-12 using a particularly characterised source of silica in the forming solution and observing a particular require- ment regarding the initial pH of that solution.GUENTAA HINRITSUCHI KUERU...
A crystalline zeolite designated ZSM -12 having the following composition expressed as mole ratios of oxides: 1.0 卤 0.4 M/n OWO20-100 YOZHO where M is at least one cation and n is the valence thereof, W is aluminum or gallium, Y is silicon or germanium, and Z is a value ranging ...
The seeds provided surface for the crystallization of ZSM-12 zeolite, thereby shortening the induction period. The formation of Si —O —Al bonds in the Si-Al precursor promoted structural rearrangement, and shortened the growth period.Keywords: solvent-free method; rapid synthesis; ZSM-12 zeolite...
Preparation of zeolite zsm-12 Preparation of zeolite ZSM-12Mae Koenig Rubin
Three MTW (H-ZSM-12) zeolite samples were synthesized by (i) direct hydrothermal method, (ii) desilication of the hydrothermal obtained product and (iii) mesostructuration of zeolite ZSM-12 seeds in the presence of hexadecyltrimethylammonium bromide. The samples were characterized by XRD, nitroge...
US4452769、US4537758和文献(S.Ernst,P.A.Jacobs,J.A.Martens,J.Weitkamp,SynthesisofzeoliteZSM-12inthesystem(MTEA) 2 O-Na 2 O-SiO 2 -Al 2 O 3 -H 2 O,Zeolites,7(1987)458-462.)介绍了一种以甲基三乙基铵离子为模板剂合成ZSM-12分子筛的方法。文献(S.Gopal,K.Yoo,P.G.Smirniotis,...
zeolite;2,6・ dimethyl—naphthalene(2,6-DMN);chemical liquiddeposition;dealumination .111. 独创性声明 独创性声明 本人声睨所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研一 究成果。据我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他 ...
(o)nsted acid sites,based on the chemical and physical properties of the ZSM-12 zeolite.%以甲基三乙基溴化铵为模板剂,硅溶胶为硅源,Al2(SO4)3·18H2O为铝源制备了2种不同n(Si) /n(Al)的ZSM-12分子筛.采用XRD、XRF、氮气吸附脱附、吡啶吸附红外光谱、SEM和TEM等表征了合成的分子筛样品.以正癸烷为...
LOIHA S,PRAYOONPOKARACH S,SONGSIRIRITTIGUN P,et al.Synthesis of zeolite beta with pretreated rice husk silica and its transformation to ZSM-12.Journal of Materials Chemistry. 2009Synthesis of zeolite beta with pretreated rice husk silica and its transformation to ZSM-12[J] . Sirinuch Loiha,...