Task: Translation
Input (Czech): Způsob výroby 2,5-dimetyl-1,4-fenylendiaminu diazotací kyseliny sulfanilové, kopulací s 2,5-dimetylanilinem a redukcí vzniklého barviva hydrazinhydrátem za katalýzy Raney - niklem.ŕ
Output (English): Process for the preparation of 2,5-dimethyl-1,4-phenylenediamine by diazotization of sulphanilic acid, coupling with 2,5-dimethylaniline and reduction of the resulting dye with hydrazine hydrate under Raney-nickel catalysis.