Molecular Sieves: Principles of Synthesis and IdentificationRosemarie Szostak Springer Science & Business Media, 29 de jun. de 2013 - 524 páginas From areport by a Lieutenant Colonel W.A. Ross (Chern. News, Nov.15, 1878, p. 236). Progress did not accelerate during the next 50 years. McBain, in his clas sic 1932 book, The Sorption oi Gases by So lids, devoted a chapter to sorp tion by chabasite, other zeolites, and permeable crystals. McBain remarked that "great interest attaches to the finding of Weigel and Steinhoff [0. Weigel and E. Steinhoff, Z. Kris!., 61, 125 (1925{raquo}) that chabasite rapidly sorbs the vapors of water, methyl and ethyl alcohol and formie acid, whereas acetone, ether and benzene are largely excluded. The significance of their results was pointed out by McBain [J.W. McBain, Colloid. Syrnp. Mon., 20, 1 (1926{raquo}) and recognized by alliater writers. It is evident that the partially dehydrated chabasite forms a nearly perfect molecular sieve or a semipermeable membrane of extremely regular structure ... ". While the significance of the above observation may have been recog nized, it had little impact. Thus, an eminent pioneer in the synthesis and characterization af zeolites, Professor R.M. Barrer, spent nearly two dec ades (following his Ph. D. studies in the 1930s) developing a firm foundation for the rapid growth in scientific understanding and industrial applications of zeolites which has taken place during the last 30 years. |
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Molecular Sieves: Principles of Synthesis and Identification Rosemarie Szostak Visualização parcial - 1998 |
Termos e frases comuns
29Si NMR Acta Crystallog adsorbed adsorption adsorption capacities AlPO4 aluminate aluminophosphate aluminosilicate aluminum analcime analog anions bands building units cancrinite Carbide Carbide Carbide Catal catalytic cation Chabazite Chem chemical shift composition containing crystalline diffraction pattern erionite Eur.Pat examined faujasite Ferrierite ferrisilicate Flanigen formation framework gallium gallosilicate germanium hydrothermal hydroxide hydroxide concentration increasing infrared spectroscopy iron metallosilicates microporous minerals Mobil molecular sieve molecular sieve materials molecules mordenite NMe4 observed offretite organic additive organic amine organic cations oxygen peak phillipsite Phys pore opening powder diffraction presence produce Raman reaction mixture ring sample shown in Figure silicalite silicate solutions silicate species silicon SiO SiO2 SiO2/Al2O3 claimed SiO2/Al2O3 ratio sodalite sodium solid phase species in solution spectra spectrum Table techniques temperature template tetrahedral thermal Typical Unit Cell U.S.Pat unit cell vibrations Xray powder diffraction zeolite crystallization zeolite structures zeolite synthesis zeolite ZSM5 ZSM5 structure