DOI: 10.1039/A702450I
(Paper)
J. Chem. Soc., Faraday Trans., 1997, 93, 3411-3415
Synthesis of SAPO-35 in non-aqueous gels
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N. Venkatathri, S. G. Hegde, P. R. Rajamohanan and S. Sivasanker
Abstract
The molecular sieve SAPO-35 has been synthesized in a non-aqueous medium for the first time using a new template, hexamethyleneimine. It has been characterized by XRD, SEM, TG–DTA, MAS NMR, FTIR and adsorption techniques. The study indicates that Si replaces mainly the P atoms in the AlPO4-35 framework giving rise to three different Brønsted acid bridging hydroxy groups, with IR absorptions at 3580, 3604 and 3631 cm−1. The three bands are attributed to Si incorporation in different tetrahedral positions in double six-membered rings and single six-membered rings.