generated by reboiler 27 at the regenerator bottom these gases are collected through line 22 at the regenerator top cooled in exchanger 23 and the majority of the water and of the solvent contained in the regenerator top gas is condensed separated in reflux drum 24 and recycled as reflux to the regenerator top through line 26 the operating temperature and pressure conditions of the regenerator depend on the type of solvent used regenerator 21 operates at a pressure generally ranging between the atmospheric pressure and 10 bara preferably between 1 5 and 3 bara the temperature at the bottom of the regenerator generally ranges between 100 u00b0 c and 200 u00b0 c preferably between 110 u00b0 c and 150 u00b0 c at the bottom of regenerator 21 a stream of hot regenerated solvent is obtained through line 28 and recycled at least partly via pump 29 and line 30 to the top of absorber 2 after heat exchange with the h 2 s rich solvent in exchanger 9 another part of the regenerated solvent is sent through line 31 to the top of absorber 15 the distribution of the regenerated solvent between absorber 2 and absorber 15 can be determined by the maximum proportion of h 2 s desired in the treated gas coming from line 3 the gases released by partial vaporization in drum 12 are preferably cooled in exchanger 13 prior to being fed through line.