Patent ID: 7988943

Claim:
A process for the conversion of sulphur-containing compounds present in a gas comprising H 2 S and sulphur-containing compounds into H 2 S, said process comprising the following steps: a) a step A for bringing said gas into contact with a reducing gas in the presence of a hydrogenation catalyst comprising at least cobalt, molybdenum and an alumina support, the sum of the quantities of cobalt and molybdenum, calculated in the oxide form, being in the range of 3% to 25% by weight, the surface area of said alumina being more than 140 m 2 /g; b) a step B for bringing at least a fraction of the effluent gas from step A into contact with a catalyst comprising at least one alkaline-earth element, at least one dopant selected from the group of iron, cobalt and molybdenum, and at least one compound selected from the group of titanium oxide and zirconium oxide, said oxides of titanium and/or zirconium corresponding to more than 5% by weight of the catalyst, the total quantity by weight of dopants being in the range of 0.5% to 50%, the total quantity by weight of alkaline-earths elements being in the range of 0.5% to 60% by weight, said catalyst for step B) being either in the form of a bulk oxide comprising only said oxides or in the form of a supported oxide.