INDIRECT ANODIC-OXIDATION OF BENZYL ALCOHOL IN THE PRESENCE OF PHASE-TRANSFER CATALYST IN A CSTER - EFFECT OF CURRENT-DENSITY, ORGANIC-TO-AQUEOUS VOLUME RATIO AND CONCENTRATION OF PHASE-TRANSFER CATALYST

The effects of current density, organic-to-aqueous volume ratio (R(v)) and concentration of phase-transfer catalyst on current efficiency, c onversion of benzyl alcohol, yield and selectivity of benzaldehyde, po wer consumption, and induction period were systematically studied in t his work. The current efficiency of the oxidation of chloride ion to h ypochlorite ion were evaluated as 62.0 and 65.0%, respectively, when R (v) was 1.0 and 2.0. The current efficiency for production of benzalde hyde was indicated by the experimental data as having decreased at a h igh organic how rate (2.0 ml min(-1)) when the concentration of phase- transfer catalyst decreased, and the current density and R(v) increase d. The conversion of benzyl alcohol and yield of benzaldehyde increase d, and the selectivity of benzaldehyde decreased at a high organic flo w rate when both the current density and the concentration of phase-tr ansfer catalyst increased. The power consumption was confirmed by the experimental results as having decreased when the current density decr eased and the concentration of phase-transfer catalyst increased.