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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2257

Title: Acetalization of ketones on K-10 clay and rare earth exchanged HFAU-Y zeolites: A mild and facile procedure for the synthesis of dimethylacetals
Authors: Bejoy, Thomas
Sugunan, S
Science
Keywords: Acetalization
Dimethylacetal
K-10 montmorillonite clay
Ce-montmorillonite clay
Rare earth exchanged H-Y zeolite
Issue Date: 2006
Publisher: Springer Netherlands
Abstract: Dimethylacetals of ketones; cyclohexanone, acetophenone, and benzophenone have been prepared by reacting ketones with methanol under mild reaction conditions. Large pore zeolites (H-Y and its rare earth metal, Ce3+, La3+, and RE3+ modified forms), and mesoporous clay (K-10 montmorillonite and its cerium exchanged counterpart) with regular pore structure, silica and silica-alumina have been used as catalysts. Clay catalysts are found to be much more active than zeolites, thanks to slightly bigger pore size. The nature of the pores of the solid acid catalysts determine acetalization efficiency of a particular catalyst. As evidenced by the reaction time studies, the catalyst decay is greater over the zeolites than over the clays. Carrying out the reaction with ketones of different molecular sizes it is shown that K-10 clays and rare earth exchanged H-Y zeolites are promising environmentally friendly catalysts for their use in the production fine chemicals.
URI: http://dyuthi.cusat.ac.in/purl/2257
ISSN: 1380-2224
Appears in Collections:Dr. Sugunan S

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