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SOLID-LIQUID PHASE TRANSFER CATALYZED SYNTHESIS OF CINNAMYL ACETATE-KINETICS AND ANALYSIS OF FACTORS AFFECTING THE REACTION IN A BATCH REACTOR
Citation:
GOPAL DEVULAPELLI, V., E. SAHLE-DEMESSIE, AND H. WENG. SOLID-LIQUID PHASE TRANSFER CATALYZED SYNTHESIS OF CINNAMYL ACETATE-KINETICS AND ANALYSIS OF FACTORS AFFECTING THE REACTION IN A BATCH REACTOR. Presented at American Institute of Chemical Engineers (AIChE) Annual Meeting, San Francisco, CA, November 13 - 17, 2006.
Impact/Purpose:
To inform the public
Description:
The use of solid-liquid phase transfer catalysis has an advantage of carrying out reaction between two immiscible substrates, one in solid phase and the other in liquid phase, with high selectivity and at relatively low temperatures. In this study we investigated the synthesis cinnamyl acetate from cinnamyl bromide and sodium acetate using tetrabutylammonium bromide (TBAB) as phase transfer catalyst in solid-liquid system. Reaction rates comparable to liquid–liquid systems were obtained. Factors affecting the reaction such as type and amount of catalyst, agitation speed, reaction temperature and the mole ratio of cinnamyl bromide to sodium acetate, addition of water and the effect of particle size of sodium acetate were investigated. The results indicate that the solid-liquid interfacial mass transfer resistance is negligible at agitation speed above 600 rpm. The reaction rate constants increased with the increase in temperature and 100% selectivity of cinnamyl acetate was observed for all the cases. Adding 2-16 volume percent of water improved the reactivity of the catalyst. The reaction was carried out using the sodium acetate in the form of fine powder shows superior performance than the reaction carried out with the sodium acetate in the form of granules (2 mm). The reaction kinetics follows pseudo-first order rate equation and the activation energy was found to be 11.2 kcal.mol-1.