DISTRIBUTION AND MASS-TRANSFER OF PHASE-TRANSFER CATALYTIC INTERMEDIATE IN 2-PHASE SYSTEM

Distribution and mass transfer of phase transfer catalytic intermediat e play an important role in phase transfer catalysis, Higher distribut ion ratio and fast mass transfer rate of active intermediate enhance t he overall reaction rate in two-phase system. The behaviors of mass tr ansfer and distribution of phase transfer catalytic intermediate in tw o-phase system were investigated in the present study. The effects of temperature, solvent, concentration of intermediate, and amounts of sa lts added on distribution were carried out in a batch vessel. The dist ribution constants increase with increasing initial concentration and temperature and were correlated as a function of equilibrium organic c oncentration. Overall mass transfer coefficients (K(QY)a) of catalytic intermediates from organic to aqueous phase for various agitating spe eds and temperatures were obtained. A mathematical model concerning ma ss transfer in a single droplet was also developed to describe the dis persed phase system successfully.