GAS SEPARATION BY ADSORPTION
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Abstract
A PROCESS FOR SEPARATING A COMPLEX GASEOUS MIXTURE FORMED OF AT LEAST THREE CONSTITUENTS AND FOR OBTAINING AT LEAST THREE OF THESE CONSTITUENTS, IN WHICH A GIVEN QUANTITY OF MIXTURE UNDER PRESSURE, AT A GIVEN TEMPERATURE, IS ADMITTED INTO SEVERAL SUCCESSIVE ADSORPTION ZONES WHICH HAVE BEEN EVACUATED, THE ADMISSION OF THE MIXTURE IS STOPPED AND ONE OR OPTIONALLY SEVERAL GASEOUS FRACTIONS ARE WITHDRAWN FROM THE LAST OF THE SAID ZONES AT ONE OR MORE INTERMEDIATE PRESSURE LEVELS, IN WHICH THE SAID ZONES, THE NUMBER OF WHICH IS LESS BY AT LEAST ONE INTEGRAL VALUE
THAN THE NUMBER OF CONSTITUENTS TO BE SEPARATED, AND WHICH CONTAIN DIFFERENT ADSORPTION MASSES CAPABLE OF SELECTIVELY ADSORBING AT LEAST ONE OF THE CONSTITUENTS OF THE GASEOUS MIXTURE, ARE THEN ISOLATED FROM ONE ANOTHER, WHEREUPON THE SELECTIVELY ADSORBED RESIDUAL FRACTIONS ARE EXTRACTED IN EACH OF THESE ZONES AT TEMPERATURES CLOSE TO THE ADMISSION TEMPERATURE AND PREFERABLY SOLELY BY APPLICATION OF A VACUUM.
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