Synthesis of SAPO-35 in non-aqueous gels
- Venkatathri, N.
- Hegde, S. G.
- Rajamohanan, P. R.
- Sivasanker, S.
DOIAbstract
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 AlPO<SUB>4</SUB>-35 framework giving rise to three different Brønsted acid bridging hydroxy groups, with IR absorptions at 3580, 3604 and 3631 cm<SUP>−1</SUP>. The three bands are attributed to Si incorporation in different tetrahedral positions in double six-membered rings and single six-membered rings
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