Abstract
A novel resin arising from the styrene/methyl acrylate/vinyl acetate (SMVA) terpolymer was prepared for efficient separation of succinic acid with hot water as an eluent, and its separation performance and mechanism were studied. Results indicated the SMVA resin exhibited a better performance on the adsorption of succinic acid with a short time for reaching the equilibrium. The adsorption process of succinic acid on the resin was exothermic and could be described by a pseudo-second-order model, and its isothermal adsorption process followed the Freundlich model. The surface of the resin was inhomogeneous, and the hydrogen bond played a positive role in promoting the adsorption of succinic acid on the resin. The adsorption capacity of succinic acid on the resin was sensitive to pH value, and better adsorption capacity was obtained at pH value between 2 and 3. The pure succinic and acetic acids in a fixed-bed packed by the resin was obtained with the definite time-period collection strategy, and the resolution of components reached to 0.82. The recovery rates of pure succinic and acetic acids on the resin basically remained constant, which shows a better application prospect.
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