Kinetics of Liquid-Phase Esterification Catalyzed by Acidic Resins

Abstract

The characteristics of ion-exchange resins provide the basis for many processes of practical interest involving both sorption separations and catalytic reactions. The optimal design and operation of these processes require a proper understanding of the equilibrium behavior of multicomponent liquid mixtures in contact with cross-linked polymeric resins, in terms of both the amount and composition of the sorbed mixture. For this, a model which describes the equilibrium between a polymer phase, described through the extended Flory−Huggins theory, and a liquid phase, which does not contain the polymer, has been developed. This has then been coupled with a kinetic model describing the catalytic reaction inside the resin particles. The model has been validated through an appropriate experimental analysis involving both equilibrium partitioning and reactive experiments, for the case of a highly cross-linked sulfonated resin in the presence of various mixtures of the components involved in the esterification of ethanol with acetic acid. The results indicate the ability of the resin not only to catalyze the esterification reaction but also to shift the corresponding equilibrium conversion, due to its swelling capability. This approach is believed to apply to a wide class of reactions catalyzed by polymeric resins, and it is suitable for the optimal design of the corresponding processes.

Dynamic Study of the Synthesis of 1,1-Dibutoxyethane in a Fixed-Bed Adsorptive Reactor

“…In order to better describe the adsorption on the swollen resin, an appropriate model, such as the modified Flory-Huggins model, should be used to predict the resin phase activities. However, for resins with a high degree of functionalization, such as A15, this model does not yield consistent results (20,21). The dynamic behavior of the fixed-bed reactor used for the DBE production will be described by the mathematical model that considers the following assumptions and mass balances:…”

Kinetic Study of Esterification of Acetic Acid with n-butanol and isobutanol Catalyzed by Ion Exchange Resin

“…Despite several studies on this useful reaction, the work on high molar ratio is quite limited; as with the high molar ratio rate of reaction increases and reaction time also decreases. There are a number of studies related to the other esterification reactions catalyzed by ion exchange resins [25][26][27][28][29][30][31][32][33][34] …”

Catalytic Hydrolysis of Ethyl Acetate using Cation Exchange Resin (Amberlyst - 15) : A Kinetic Study

“…It works under heterogenous conditions, can easily be handled and removed by simple filtration [8]. There is growing research using amberlyst-15 catalyst for esterification reactions [5,[9][10][11] but not much work is reported on hydrolysis reaction.…”