Crystallisation of silicalite-1 precursors in the amine–(C3H7)4NBr–SiO2–H2O system
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Crystallisation of silicalite-1 precursors in the amine–(C3H7)4NBr–SiO2–H2O system

Stuart G. Fegan,Barrie M. Lowe;Stuart G. Fegan;Barrie M. Lowe;
journal of the chemical society, faraday transactions 1: physical chemistry in condensed phases 1986 Vol. 82 pp. 801-813
194
lowe1986journalcrystallisation

Abstract

The crystallisation of alkali-metal-free silicalite-1 precursors from the PIPZ–TPABr–SiO2–H2O (PIPZ = piperazine, TPA = tetrapropylammonium) system has been investigated under static and stirred conditions. In many cases large rod-like crystals of (TPA, PIPZ)-silicalite-1 were obtained. The crystallisations were accompanied by decreases in pH caused by the incorporation of base in the crystals. Smaller pH decreases were observed when the PIPZ/SiO2 molar ratio was increased.

Keywords

molar crystallisation static smaller silicalite h2o 4nbr tetrapropylammonium pipz/sio2

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DOI:
10.1039/f19868200801
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https://sciprofiles.com/publication/view/317c2f3bc...

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ID: 272732
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