Adsorbent having improved selectivity for the separation of gases

US6406520B1 · 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

Inventor

• Bernard Lledos · Guyancourt, FR

Key dates

• Filing date: Jun 20, 2000
• Grant date: Jun 18, 2002
• Expiry date: Jul 20, 2020

Classification

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

Abstract

A porous adsorbent includes pores having a pore diameter (Dm) of between 1 nm and 14 nm and an oxygen adsorptivity, measured at +20° C. and 1 bar, of at most 10 Scc/g. This adsorbent is used in a process for adsorbing at least one gaseous compound contained in a gas mixture containing several gaseous compounds of different polarity. Preferably, the gas mixture to be separated or to be purified is chosen from mixtures containing oxygen and nitrogen, particularly air, mixtures containing carbon monoxide and hydrogen, and hydrocarbons, especially olefins, advantageously, the process is of the PSA or VSA type.