Catalytic Hydrogenation of 3,4-Dichlornitrobenzene to 3,4-Dichloroaniline

Catalytic hydrogenation of 3,4-dichloronitrobenzene with W-4 Raney-Ni catalyst was investigated.The operating conditions for the hydrogenation of 3,4-dichloronitrobenzene to produce 3,4-dichloroaniline were optimized.The product obtained contained more than 99% 3,4-dichloroaniline with melting point of 70～71 ℃,the amount of chlorine removed was less than 2%and the yield was 85%.