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Transesterifications over titanosilicate molecular sieves

D. , Srinivas and R, Srivastava and P. , Ratnasamy (2004) Transesterifications over titanosilicate molecular sieves. Catalysis Today, 96 (3). pp. 127-133.

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Abstract

Titanosilicate molecular sieves (TS-1, Ti-MCM-41 and amorphous TiO2–SiO2) catalyze transesterification reactions. Acidity measurements (pyridine adsorption-IR and NH3-TPD) reveal the presence of only weak Lewis acid sites. Catalytic activity parallels the acid strength and increases in the order: TS-1 < Ti-MCM-41 < amorphous TiO2–SiO2. TS-1 efficiently catalyzes the transesterification of only linear esters (ethylacetoacetate and diethylmalonate), but fails for cyclic esters like propylene carbonate. Ti-MCM-41 and amorphous TiO2–SiO2 are superior for the latter. The catalysts could be recycled without any loss in activity/selectivity.

Item Type:Article
Subjects:Science > Chemistry
ID Code:594
Deposited By:Dr S Navaladian
Deposited On:08 Apr 2007 00:59
Last Modified:08 Apr 2007 00:59

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