KINETICS OF LIQUID-PHASE CATALYTIC REDUCTION OF 2-CHLORO-4-NITROANILINE

The kinetics of liquid-phase reduction of 2-chloro-4-nitroaniline on p latinum and palladium catalysts with a varied content of the metals is studied. Hydrodehalogenation is found to occur as a side reaction. Th e effect of various factors on the rate and selectivity of the process is examined. It is shown that hydrodehalogenation involves essentiall y the initial nitro compound. The main and side processes are the para llel first-order reactions. The decrease in the rate constants of the main and side reactions in a series of aliphatic alcohols correlates w ell with weakening electrophilic properties of the solvents. Optimum c onditions, which ensure the high rate and selectivity of the reaction, are selected.