APPLICATION OF THE ANODIC PROCESS FOR THE CATHODIC SYNTHESIS OF BENAZOLE-P AS A METHOD TO REDUCE THE INDUSTRIAL EFFECT ON THE ENVIRONMENT

The anodic oxygen evolution process, which accompanies the cathodic re duction cyclization of 2-nitro-2'-hydroxy-5'-methylphenylazobenzene to 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, is suggested for isolati on of the benazole P from solution. The synthesis-isolation cycle can be repeated in a diaphragm electrolyzer using one and the same solutio n at least five times without degradation of the process and product p arameters.