Process for purifying air by adsorption over a barium-exchanged zeolite

US6425937B1 · kind B1 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Georges Kraus · Paris, FR
• Cyrille Millet · Paris, FR
• Serge Moreau · Vélizy-Villacoublay, FR
• Jean-Pierre Gabillard · Auffargis, FR

Key dates

• Filing date: Jul 3, 2000
• Grant date: Jul 30, 2002
• Expiry date: Jul 25, 2020

Classification

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

Abstract

A process for purifying a gas stream containing at least one impurity chosen from the group formed by propane, nitrogen protoxide and ethylene, in which process:(a) the gas stream to be purified is brought into contact with at least one adsorbent including at least one X zeolite containing barium cations;(b) at least one impurity is adsorbed on the adsorbent. Preferably, the adsorbent includes particles of X zeolite exchanged to at least 70%, preferably at least 89%, with barium cations, it being possible for the adsorbent to furthermore include a bed of activated alumina particles which is located upstream of the bed of barium-exchanged X zeolite.