화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.50, No.3, 796-800, 2005
Effect of hydrotropes on the solubility and mass transfer coefficient of benzyl benzoate in water
This work presents a comprehensive study on the effect of hydrotropes on the solubility and mass transfer coefficient of benzyl benzoate in water. The solubility studies were performed using hydrotropes such as tri-sodium citrate, urea, sodium benzoate, and sodium salicylate for various concentrations in the range from (0 to 3.0) mol• L-1 and system temperatures ranging from T = (303 to 333) K. The performance of the hydrotropes was measured in terms of the Setschenow constant (K-S). It was found that the solubility of benzyl benzoate increases with an increase in hydrotrope concentration and also with system temperature. A minimum hydrotrope concentration (MHC) in the aqueous phase was required to initiate significant solubilization of benzyl benzoate. Consequent to the increase in solubilization of benzyl benzoate, the mass transfer coefficient was also found to increase with an increase in hydrotrope concentration. All hydrotropes used in this work showed an enhancement in the solubility and mass transfer coefficient to different degrees. The maximum enhancement factor, which is the ratio between the presence and absence of a hydrotrope, has been determined for both cases. However, a threshold value of the MHC was found essential to initiate significant increase in hydrotrope concentration.