The investigations of elaborated industrial catalysts in Claus process displayed a weak catalytic  activity of the catalyst Go-30/7 with the yield no more  than 60% and the active enough catalyst  S-12 with the yield of elementary sulphur 96–98%/ The highest yield at the catalyst S-12 has been  obtained at the ratio H₂S:SO₂=2, velocity 750–1200 h^-1 and temperature 250⁰C