Synthesis of o-Phenylenediamine from o-nitroaniline and H2S in Aqueous Solutions.

In the reported experiments, the investigations of reduction, catalyzed by sodium polysulphides, of o-nitrioaniline with H//2S in water solutions in the presence of emulgator have been carried out. The investigations have shown that in these conditions in the temperature ca. 373 K under the pressure 3,5. 10**5 N/m**2 the process has been relatively quick. The final products of the reduction have been o-phenylenediamine and elementary sulphur.