Abstract: The invention has as its object a process for the treatment of a gas that contains hydrogen sulfide and sulfurous anhydride, in which: a) The gas (3) is brought into contact with an organic solvent (1) that contains a catalyst in at least one gas-liquid reactor-contactor (2); a gas effluent that contains vapor sulfur and liquid sulfur is recovered separately, b) Said gas effluent is introduced 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 the so-called cold walls of the equipment of the zone (7), c) When the clogging limit of said equipment of zone (7) is reached, said equipment is regenerated so as to melt the solid sulfur that is deposited inside said equipment for obtaining a liquid effluent, d) Said liquid effluent is recycled in the reactor-contactor, e) A purified gas that contains less than 30 ppm by volume of sulfur is extracted from the zone (7).

Abstract: A process for partial dehydration of a gas by contact with a solvent that can be regenerated by: a) A stage for absorption of H2O by contact of the gas to be treated and regenerated solvent producing a dehydrated gas effluent and a liquid solvent effluent that is charged with H2O and absorbed gas, b) A stage for cooling the solvent charged with H2O at ambient temperature, c) A stage for separation by segregation during which liquid H2O and the solvent are separated at ambient temperature, d) A stage in which the regenerated solvent that is obtained at the end of stage c) is heated, e) A stage in which the regenerated and heated solvent that is obtained at the end of stage d) is recycled to the absorption stage a).