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Effects of substitution in SAPO-n Frameworks on their Properties as Acid Catalysts

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Guidelines for Mastering the Properties of Molecular Sieves

Part of the book series: NATO ASI Series ((NSSB,volume 221))

Abstract

Various similarities exist between the oxygen chemistry of phosphorus and silicon. The synthetic aluminophosphates are numerous, and may sometimes resemble aluminosilicates. Besides, mineral silicates exist in which (SiO4) is isomorphously replaced by (PO4)1. Barrer and Marshall2,3 found that aluminophosphates often co-precipitate with aluminosilicates but could not find any evidence for the crystallization of silicoaluminophosphate frameworks. Phosphate-rich hydrous aluminosilicate gels crystallize as separate aluminosilicates and aluminophosphates, with no observable isomorphous substitution2. Kühl4,5 also never encountered phosphate substitution in the zeolite framework when using phosphate as a complexing agent or as a buffer in the synthesis mixture. The aim of such research was primarily to synthesize zeolite structures with increased SiO2/Al2O3 ratios by using complexing agents for Al. No evidence was obtained for the substitution of P for Si.

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Authors and Affiliations

  1. Laboratorium voor Oppervlaktechemie, K.U. Leuven, Kardinaal Mercierlaan 92, B-3030, Heverlee, Belgium

    Machteld Mertens, Johan A. Martens, Piet J. Grobet & Peter A. Jacobs

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  1. Machteld Mertens
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  2. Johan A. Martens
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  3. Piet J. Grobet
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Editors and Affiliations

  1. Université Paris VI, Paris, France

    Denise Barthomeuf

  2. Université Notre Dame de la Paix, Namur, Belgium

    Eric G. Derouane

  3. BASF, Ludwigshafen, Federal Republic of Germany

    Wolfgang Hölderich

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© 1990 Plenum Press, New York

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Mertens, M., Martens, J.A., Grobet, P.J., Jacobs, P.A. (1990). Effects of substitution in SAPO-n Frameworks on their Properties as Acid Catalysts. In: Barthomeuf, D., Derouane, E.G., Hölderich, W. (eds) Guidelines for Mastering the Properties of Molecular Sieves. NATO ASI Series, vol 221. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5787-2_1

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  • DOI: https://doi.org/10.1007/978-1-4684-5787-2_1

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-5789-6

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