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This study investigates the effects of the variation in reagents on the synthesis of zeolite A. The synthesis was attempted under autogenic conditions and at temperatures of 100 (±1)°C and 70(±1)°C, using various aluminium and silicon sources. Preparation of the gels used silica and aluminium to form mixed systems of organic and inorganic reagent sources. Products formed were analysed and characterised...
The hydrothermal crystallization of SAPO-5 in a biphasic water-hexanol system in the presence of surfactants has been studied. Large crystallite aggregates with a high organic content are obtained by using a high concentration of cationic surfactants in the synthesis. The Si content of crystals is much less affected. 29 Si MASn.m.r. also shows deep modifications of the mechanism of...
The optimization of the hydrothermal SAPO-5 synthesis using the system Al 2 O 3 :P 2 O 5 :SiO 2 :TEA (triethylamine): H 2 O resulted in the formation of large crystals (average size of up to 220 50 μm) of hexagonal rod-like morphology and high optical quality in high yields only, if an aluminum oxide hydrate sol or a pseudohydrargillite was used as...
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