PSA process using an aggregated adsorbent consisting of a zeolite phase and a binder

US6258152A · kind A · utility

Assignee

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

Inventors

• Jacques Labasque · Versailles, FR
• Bernard Lledos · Guyancourt, FR
• Serge Moreau · Vélizy-Villacoublay, FR

Key dates

• Filing date: Aug 23, 1999
• Grant date: Jul 10, 2001
• Expiry date: Aug 23, 2019

Classification

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

Abstract

A PSA process for separating a gas flow, such as air, containing a first gas compound, such as nitrogen, which is adsorbed preferentially on an adsorbent, and a second gas compound, such as oxygen, which is adsorbed less preferentially on the adsorbent than the first gas compound. The adsorbent is formed by an aggregate comprising a zeolite phase and a binder, and contains elements Si, Al, Li, Na, Mg, K and Ca, the total proportions of these elements in the adsorbent being such that the Si/Al ratio is between 1 and 2.4, the Na/Li ratio is between 0.012 and 0.300, the Mg/Li ratio is between 0.012 and 0.400, the Ca/Li ratio is between 0.012 and 0.200, and the K/Li ratio is between 0.001 and 0.060.