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In the present work, the synthesis of silica-alumina-pillared montmorillonites and their structure are studied. Hydroxy-silico-aluminum oligocations have been obtained by treating previously synthesised aluminum polycations with Si(OC 2 H 5 ) 4 . Several Si/Al ratios (0, 0.5, 1, and 2) have been used to prepare pillared clays with various microporous accessibility and acidic...
The synthesis method of a stable, large-pore tantalum-pillared montmorillonite family (Ta-PILC) and its physicochemical characterization are reported. The clay used is a sodium montmorillonite. The tantalum pillaring solution is prepared by careful control of the hydrolysis of a tantalum alkoxide precursor, Ta(OC 2 H 5 ) 5 , in an ethanolic acidic solution. From XRD analysis...
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