Process for removing acid constituents from gaseous mixtures

Claim 1

THE PROCESS OF REMOVING GASEOUS ACID GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE FROM ADMIXTURE WITH GASEOUS C1-C3 ALKANE HYDROCARBONS WHICH COMPRISES CONTACTING SAID GASEOUS ADMIXTURE IN A FIRST CONTACTING ZONE WITH A MIXTURE OF AN ACID GAS ABSORBENT CONSISTING ESSENTIALLY OF A FIRST SOLVENT, SELECTED FROM THE GROUP CONSISTING OF HYDROACRYLONITRILE AND A MIXTURE OF HYDROACRYLONITRILE WITH A LIQUID INERT TO THE SOLVENT AND GAS ADMIXTURE CONSTITUENTS, AND A SECOND HIGHER BOILING LIQUID SOLVENT ADAPTED TO ADSORB MOISTURE AND SAID FIRST SOLVENT; SEPARATELY WITHDRAWING A LIQUID STREAM CONSISTING ESSENTIALLY OF SAID SECOND SOLVENT AND A GASEOUS STREAM COMPRISING APORIZED FIRST SOLVENT AND UNADSORBED COMPONENTS OF SAID GASEOUD ADMIXTURE FROM SAID FIRST CONTACTING ZONE; PASSING SAID GASEOUS STREAM THROUGH A COOLING ZONE WHEREBY PART OF SAID GASEOUS STREAM IS CONDENSED; SEPARATELY WITHDRAWING CONDENSATE AND UNCONDENSED COMPONENTS OF SAID GASEOUS STREAM FROM SAID FIRST COOLING ZONE; COMBINING SAID CONDENSATE WITH SAID LIQUID STREAM FROM SAID FIRST CONTACTING ZONE,