Control of Al for B framework substitution in zeolite Beta by counterions
作者： Huong Thi Thanh Tong , Hubert Koller
DOI: 10.1016/J.MICROMESO.2011.07.021
关键词: Inorganic chemistry 、 Counterion 、 Ion exchange 、 Boron 、 Protonation 、 Reactivity (chemistry) 、 Solid-state nuclear magnetic resonance 、 Calcination 、 Crystallography 、 Chemistry 、 Zeolite
摘要: Abstract Al insertion into boron Beta zeolite is quantitatively controlled by a three-step procedure. First, mixed Na+/ NH 4 + counterion series balancing the charge of tetrahedral framework prepared ion exchange. Subsequent calcination converts to H+ which accompanied transformation trigonal coordination. Secondly, calcined Na+/H+ samples are deboronated in water allows preferential extraction at protonated sites. The sites balanced sodium cations protected against deboronation due low reactivity boron. Finally, aluminum vacated achieved ethanol solutions Al(NO3)3. ratio counterions determines extent substitution for Each step analyzed using solid state NMR. Al–B exchange can be tuned large range.
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sci-hub.se 参考文章(40)
Roberto Millini, Giovanni Perego, Giuseppe Bellussi, Synthesis and characterization of boron‐containing molecular sieves Topics in Catalysis. ,vol. 9, pp. 13- 34 ,(1999) , 10.1023/A:1019198119365
Gopalakrishnan G Juttu, Raul F Lobo, None, Framework modification of microporous silicates via gas‐phase treatment with ZrCl4 Catalysis Letters. ,vol. 62, pp. 99- 106 ,(1999) , 10.1023/A:1019047022166
U. Lohse, B. Altrichter, R. Fricke, W. Pilz, E. Schreier, Ch. Garkisch, K. Jancke, SYNTHESIS OF ZEOLITE BETA. PART 2.-FORMATION OF ZEOLITE BETA AND TITANIUM-BETA VIA AN INTERMEDIATE LAYER STRUCTURE Journal of the Chemical Society, Faraday Transactions. ,vol. 93, pp. 505- 512 ,(1997) , 10.1039/A603690B
Stacey I. Zones, Yumi Nakagawa, Boron-beta zeolite hydrothermal conversions: The influence of template structure and of boron concentration and source Microporous Materials. ,vol. 2, pp. 543- 555 ,(1994) , 10.1016/0927-6513(94)00025-5
M.J. Eapen, K.S.N. Reddy, V.P. Shiralkar, Hydrothermal crystallization of zeolite beta using tetraethylammonium bromide Zeolites. ,vol. 14, pp. 295- 302 ,(1994) , 10.1016/0144-2449(94)90099-X
Christian Fild, Hellmut Eckert, Hubert Koller, Evidence for Selective Association of Tetrahedral BO4 Units with Na+ and of Trigonal BO3 Units with H+ in Dehydrated Zeolite B-ZSM-5 from Solid-State NMR Spectroscopy Angewandte Chemie International Edition. ,vol. 37, pp. 2505- 2507 ,(1998) , 10.1002/(SICI)1521-3773(19981002)37:18<2505::AID-ANIE2505>3.0.CO;2-F
Ryszard Mostowicz, Flaviano Testa, Fortunato Crea, Rosario Aiello, Antonio Fonseca, Janos B. Nagy, Synthesis of zeolite beta in presence of fluorides: Influence of alkali cations Zeolites. ,vol. 18, pp. 308- 324 ,(1997) , 10.1016/S0144-2449(97)00001-8
Avelino Corma, Laszlo T. Nemeth, Michael Renz, Susana Valencia, Sn-zeolite beta as a heterogeneous chemoselective catalyst for Baeyer–Villiger oxidations Nature. ,vol. 412, pp. 423- 425 ,(2001) , 10.1038/35086546
S. Kallus, J. Patarin, P. Caullet, A.C. Faust, Synthesis of boron-beta zeolite from near-neutral fluoride-containing gels Microporous Materials. ,vol. 10, pp. 181- 188 ,(1997) , 10.1016/S0927-6513(97)00010-2
Christian Fild, Daniel F Shantz, Raul F Lobo, Hubert Koller, None, Cation-induced transformation of boron-coordination in zeolites Physical Chemistry Chemical Physics. ,vol. 2, pp. 3091- 3098 ,(2000) , 10.1039/B002134M