Patent ID: 8062619

Claim:
Process for the treatment of a gas that contains hydrogen sulfide and sulfurous anhydride comprising the following stages: a) The gas ( 3 ) is brought into contact with an organic solvent ( 1 ) that contains a sulfur forming catalyst in at least one gas-liquid reactor-contactor ( 2 ); a gas effluent that contains vapor sulfur and liquid sulfur stream ( 25 ) are recovered separately, b) Said gas effluent is introduced, in indirect contact with a cooling fluid into a first condensation zone ( 7 ) that operates at a temperature of between 70 and 100° C. so that the sulfur that is contained in said gas effluent is deposited in solid form on relatively cold walls of the equipment of the zone ( 7 ), said cooling fluid used in the first condensation zone being from fluid used for cooling the organic solvent, the latter being extracted, cooled, and then recycled to the reactor-contactor, c) When the clogging limit of said equipment of zone ( 7 ) is reached, said equipment is regenerated by passing hot organic solvent extracted from said at least one gas-liquid reactor-contactor so as to melt the solid sulfur that is deposited inside said equipment to obtain an organic solvent and liquid sulfur effluent, d) Said organic solvent liquid sulfur effluent is recycled to the reactor-contactor, where said liquid sulfur is decanted and removed, e) A purified gas that contains less than 30 ppm by volume of sulfur is extracted from the zone ( 7 ), and f) A second condensation zone ( 9 ) is implemented and operates in parallel and alternatively with the zone ( 7 ) when the latter is in regeneration phase (stage c), and vice versa.