Catalysis Database

Synthesis of dimethyl acetal of ketones: design of solid acid catalysts for one-pot acetalization reaction

Bejoy , Thomas and Sreedharan , Prathapan and S, Sugunan (2005) Synthesis of dimethyl acetal of ketones: design of solid acid catalysts for one-pot acetalization reaction. Microporous and Mesoporous Materials , 80 (1-3). pp. 65-72.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TH4-4F973P2-1&_user=518931&_coverDate=05%2F02%2F2005&_alid=581573275&_rdoc=29&_fmt=full&_orig=search&_cdi=5272&_sort=d&_docanchor=&view=c&_ct=51&_acct=C000025838&_version=1&_urlVersion=0&_userid=5

Abstract

The synthesis of dimethyl acetals of carbonyl compounds such as cyclohexanone, acetophenone, and benzophenone has successfully been carried out by the reaction between ketones and methanol using different solid acid catalysts. The strong influence of the textural properties of the catalysts such as acid amount and adsorption properties (surface area and pore volume) determine the catalytic activity. The molecular size of the reactants and products determine the acetalization ability of a particular ketone. The hydrophobicity of the various rare earth exchanged Mg–Y zeolites, K-10 montmorillonite clay, and cerium exchanged montmorillonite (which shows maximum activity) is more determinant than the number of active sites present on the catalyst. The optimum number of acidic sites as well as dehydrating ability of Ce3+-montmorillonite and K-10 montmorillonite clays and various rare earth exchanged Mg–Y zeolites seem to work well in shifting the equilibrium to the product side.

Item Type:Article
Subjects:Science > Chemistry
ID Code:755
Deposited By:Prof Balasubramanian Viswanathan
Deposited On:28 May 2007 08:59
Last Modified:28 May 2007 08:59

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