BEENACKERS, AACM

PANNEMAN, HJ

The liquid-phase hydration of cyclohexene, a pseudo-first-order reversible reaction catalyzed by a strong acid ion-exchange resin, was investigated in solvent mixtures of water and sulfolane. Macroporous Amberlite XE 307 was used because of its superior catalytic activity. Chemical equilibrium conversions were measured as a function of temperature, 353 K &lt;T &lt;423 K, and solvent composition (between 0 and 90 mol % sulfolane in water). A decrease by a factor of 3 and 6 is observed in the experimentally measured equilibrium conversion for solvent mixtures with 60 and 90 mol % sulfolane, respectively. This effect is explained in terms of activity coefficients of the reaction species involved. Classical methods of thermodynamics allowed the computation of the equilibrium constant K(a), as K(a) = 2.37 X 10(-5) exp(30236/RT). From use of the predictive UNIFAC method to describe the liquid-phase nonideality, it was possible to estimate the equilibrium conversion of cyclohexene for every solvent composition and temperature. The predicted equilibrium conversions agree well with experimental results.</p

SOLVENT EFFECTS ON THE HYDRATION OF CYCLOHEXENE CATALYZED BY A STRONG ACID ION-EXCHANGE RESIN .3. EFFECT OF SULFOLANE ON THE EQUILIBRIUM CONVERSION

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Proceedings - University of Groningen