Process and plant for separating a gas mixture

US10066870B2 · kind B2 · utility

Assignee

• Linde GmbH · DE

Inventor

• Bernd Klein · Gerolzhofen, DE

Key dates

• Filing date: Sep 21, 2016
• Grant date: Sep 4, 2018
• Expiry date: Dec 1, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25J2245/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process and plant are proposed for separating a feed mixture predominantly or exclusively containing carbon monoxide and hydrogen, in which the feed mixture is subjected to a cryogenic separation process in which a carbon monoxide-rich liquid and at least one residual gas mixture which is depleted in carbon monoxide and enriched in hydrogen, in comparison with the feed mixture, are formed. It is intended that the at least one residual gas mixture is subjected to a membrane separation process in which at least one hydrogen-rich permeate and at least one carbon monoxide-rich retentate are formed, wherein the or at least one of the carbon monoxide-rich retentates is recirculated to the cryogenic separation process.