Patent ID: 6319303
Filing Date: 2001-11-20
Classification: B01D,Y02C

Abstract:
Process for purifying a gas by adsorption of a first impurity and of a second impurity, in which several adsorbers (5A, 5B, 6A, 6B; 5A, 5B, 6) are used cyclically and selectively in the adsorption phase and in the regeneration phase, characterized in that at least two main adsorbers (5A, 5B) and at least one auxiliary adsorber (6A, 6B; 6) are used, in that, during at least a first step, the gas is purified by adsorbing the two impurities by passing through at least a first (5A, 5B) of the main adsorbers without passing through a first auxiliary adsorber (6A, 6B; 6), and in that simultaneously the second main adsorber (5A, 5B) and the or each auxiliary adsorber (6A, 6B; 6) are regenerated in parallel, then, during a second step, at least some of the gas flow is purified by adsorption of the two impurities by passing in series through the first main adsorber (5A, 5B) and through the first auxiliary adsorber (6A, 6B; 6).