Patent ID: 7309382

Claim:
A method of processing a gas comprising at least one of the impurities CO 2 , H 2 S, SO 2 COS, CS 2 , mercaptans, N 2 and NH 3 , wherein the following stages are carried out: a) contacting the gas with a solvent absorbing the impurities so as to obtain an impurity-laden solvent and a scrubbed gas, b) expanding the impurity-laden solvent through a two-phase turbine so as to release an amount of impurities in gaseous form and to obtain an impurity-depleted solvent, c) separating said amount of impurities from said impurity-depleted solvent, d) expanding said impurity-depleted solvent through a second two-phase turbine so as to release a second amount of impurities in gaseous form and to obtain an expanded solvent, and e) separating said second amount of impurities from said expanded solvent.