L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Christine Marot

Pierre Petit

Serge Moreau

Xavier Vigor

Jacques Labasque

Lahcen Ougarane

Bruno Marie

Jean-Marc Scudier

Sylvie Fraysse

Philippe Van Der Have

Jean-Pierre Larue

A PSA process for the separation of a feed gas, for example air, containing at least one first component, such as nitrogen, and a second component, such as oxygen, by preferential adsorption of the first component at a high adsorption pressure, on at least one bed of particles of an adsorbent material and recovery of a gas flow enriched in the second component, with desorption of the first component at a low desorption pressure. The ratio (.mu./.sigma.) of the mean granulometry (.mu.) of the adsorbent particles contained in the bed, to the breadth of granulometric distribution (.sigma.) of the particles, is comprised within the range 1.5 to 15, the particles of adsorbent material being particles of zeolite, such as zeolite X or zeolite LSX, exchanged by metallic cations, preferably cations of lithium and/or calcium.

Process for separating a gaseous flow by a PSA procedure

In a 'vacuum' type cycle, the depressurization of a first adsorber at the high pressure of the cycle is effected by placing it in communication with the outlet of a second adsorber at the low pressure of the cycle. This communication takes place simultaneously with countercurrent pumping in a first stage for the second adsorber and in a second stage for the first adsorber, the recompression to the high pressure of the cycle being effected by production gas. Used for the production of oxygen from air.

Process for the production of a gas by adsorption

Adsorption process and unit for the production of a gas by separation of

Gases to be used for CO.sub.2 laser operation and process of operating

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Buc, France

Christine Marot