PSA process using an adsorbent with heterogeneous properties of capacity and/or selectivity

US6022397A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Dominique Rouge · Malakoff, FR
• Jacques Labasque · Versailles, FR
• Serge Moreau · Vélizy-Villacoublay, FR
• Christophe Montfort · Buc, FR

Key dates

• Filing date: Apr 15, 1998
• Grant date: Feb 8, 2000
• Expiry date: Apr 15, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S95/902
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For the separation of nitrogen from oxygen in air, an adsorbent is used which preferentially adsorbs the nitrogen. The adsorbent is a heterogeneous zeolite whose particles have a distribution of the capacity to adsorb nitrogen relative to oxygen, with a ratio (.sigma..sub.c /.mu..sub.c) comprised between 0.02 and 0.15, and/or having a distribution of selectivity of adsorption of nitrogen relative to oxygen with a ratio (.sigma..sub.s /.mu..sub.s) comprised between 0.02 and 0.25.