Method for separating co2 and h2s from gas mixtures

Claim 1

A METHOD FOR REMOVING SLIGHTLY ACIDIC GASES SELECTED FROM THE GROUP CONSISTING OF CO2 AND ''2S FROM A GAS MIXTURE CONTAINING AT LEAST ONE OF THESE GASES, SAID METHOD INVOLVING THE USE OF A SCRUBBING SOLUTION WHICH IS CONTINUOUSLY RECYLED BETWEEN AN ABSORPTION COLUMN AND A REGENERATION COLUMN AND COMPRISING THE STEPS OF CONTACTING THE GAS MIXTURE IN AN ABSORPTION COLUMN MAINTAINED AT A SUPERATMOSPHERIC PRESSURE OF AT LEAST 50 LBS. PER SQUARE INCH GAGE WITH A SCRUBBING SOLUTION COMPRISING AN AQUEOUS SOLUTION OF AN ALKALINE REAGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL PHOSPHATES, AND ALKANOLAMIES, CONDUCTING ATHE SOLUTION FROM SAID ABSORPTION COLUMN CONATAINING ABSORBED GASES TO A REGENERATION STAGE INCLUDING A BOILING AND STEAM STRIPPING COLUMN AND THEREIN REDUCING THE PRESSURE ON SAID SOLUTION TO A PRESSURE IN THE VICINITY OF ATMOSPHERIC AND SUBSTANTIALLY BELOW THE PRESSURE IN SAID ABSORPTION COLUMN AND THEREAFTER SUBJECTING THE HOT DECOMPRESSED SOLUTION WITHOUT ANY SUBSTANTIAL INTERMEDIATE COOLING TO BOILING AND STEAM STRIPPING IN A COUNTERCURRENT MANNER IN SAID BOILING AND STEAM STRIPPING COLUMN AT A PRESSURE WHICH COARRESPONDS TO SOLUTION TO SAID ABING TEMPERATURES RANGING FROM 175*F. TO 285*F. AND THEREAFTER RECYLING THE REGENERATED SOLUTION TO SAID ABSORPTION COLUMN AND THEREIN ABSORBING SAID ACIDIC GASES AT A TEMPERATURE WITHIN SAID RANGE OF FROM 175*CF. TO OF THE SOLUATION LEAVING THE AREGENERATION COLUMN.

Claim 2

A METHOD FOR REMOVING SLIGHTLY ACIDIC GASES SELECTED FROM THE GROUP CONSISTING OF CO2 AND ''2S FROM A GAS MIXTURE CONTAINING AT LEAST ONE OF THESE GASES, SAID METHOD INVOLVING THE USE OF A SCRUBBING SOLUTION WHICH IS CONTINUOUSLY RECYLED BETWEEN AN ABSORPTION COLUMN AND A REGENERATION COLUMN AND COMPRISING THE STEPS OF CONTACTING THE GAS MIXTURE IN AN ABSORPTION COLUMN MAINTAINED AT A SUPERATMOSPHERIC PRESSURE OF AT LEAST 50 LBS. PER SQUARE INCH GAGE WITH A SCRUBBING SOLUTION COMPRISING AN AQUEOUS SOLUTION OF AN ALKALINE REAGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL PHOSPHATES, AND ALKANOLAMIES, CONDUCTING ATHE SOLUTION FROM SAID ABSORPTION COLUMN CONATAINING ABSORBED GASES TO A REGENERATION STAGE INCLUDING A BOILING AND STEAM STRIPPING COLUMN AND THEREIN REDUCING THE PRESSURE ON SAID SOLUTION TO A PRESSURE IN THE VICINITY OF ATMOSPHERIC AND SUBSTANTIALLY BELOW THE PRESSURE IN SAID ABSORPTION COLUMN AND THEREAFTER SUBJECTING THE HOT DECOMPRESSED SOLUTION WITHOUT ANY SUBSTANTIAL INTERMEDIATE COOLING TO BOILING AND STEAM STRIPPING IN A COUNTERCURRENT MANNER IN SAID BOILING AND STEAM STRIPPING COLUMN AT A PRESSURE WHICH COARRESPONDS TO SOLUTION TO SAID ABING TEMPERATURES RANGING FROM 175*F. TO 285*F. AND THEREAFTER RECYLING THE REGENERATED SOLUTION TO SAID ABSORPTION COLUMN AND THEREIN ABSORBING SAID ACIDIC GASES AT A TEMPERATURE WITHIN SAID RANGE OF FROM 175*CF. TO OF THE SOLUATION LEAVING THE AREGENERATION COLUMN.