Process and device for the preparation of a flow which is substantially purified with respect to at least one of the impurities oxygen and carbon monoxide

US5685172A · kind A · utility

Assignee

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

Inventors

• Bernard Darredeau · Sartrouville, FR
• Daniel Gary · Montigny-le-Bretonneux, FR
• Christiane Muller · Jouy-en-Josas, FR

Key dates

• Filing date: Jun 25, 1996
• Grant date: Nov 11, 1997
• Expiry date: Jun 25, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S62/924
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process and apparatus for preparing a flow which is substantially purified with respect to at least one of the impurities O.sub.2 and CO, according to which: PA1 a) a flow to be purified, comprising at least 90 mol % of a compound chosen from nitrogen, helium, neon, argon, krypton, xenon or a mixture of these compounds and at least one of the impurities O.sub.2 and CO, is cooled to a temperature of less than -40.degree. C.; PA1 b) the cooled flow is passed through an adsorbent for the adsorption of at least one of the impurities O.sub.2 and CO, the adsorbent comprising at least one porous metal oxide; PA1 c) a flow which is substantially purified with respect to at least one of the impurities O.sub.2 and CO is recovered.