Gas separation

US4144038A · kind A · utility

Assignee

• The BOC Group Limited · US

Inventor

• John W. Armond · Buckhurst Hill, GB

Key dates

• Filing date: Feb 25, 1977
• Grant date: Mar 13, 1979
• Expiry date: Feb 25, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25J2205/60
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for increasing the proportion of a gas in a gaseous mixture comprising such gas and at least two other constituents. The gaseous mixture in a substantially unpressurized condition is drawn successively through two beds of absorbent which adsorbs the two other constituents respectively by the action of a reduced pressure applied to an outlet of the second adsorbent bed in the series. The beds are then regenerated prior to a further admission of gaseous mixture thereto.