Method and device for separating gas mixtures formed above liquids

US5537911A · kind A · utility

Assignees

• GKSS-Forschungszentrum Geesthacht GmbH · DE
• SIHI Anlagentechnik GmbH · DE

Inventors

• Klaus Ohlrogge · Geesthacht, DE
• Jan Wind · Barsbüttel, DE
• Michael Burmeister · Lauenburg/Elbe, DE

Key dates

• Filing date: Dec 20, 1994
• Grant date: Jul 23, 1996
• Expiry date: Dec 20, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/22
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a method for separating a gas mixture above a liquid a separating device with a gas separation membrane having retentate side and a permeate side is employed. A vacuum at the retentate side of the gas separation membrane and a vacuum at the permeate side of the gas separation membrane are provided. The gas mixture, resulting from transferring a liquid from one storage container to another container upon contact with the surroundings, is fed to the retentate side of the gas separation membrane by the vacuum present at the retentate side and the permeate side. The flow volume per time unit of the gas mixture fed to the separating device is greater than a flow volume per time unit of the liquid being transferred. On the retentate side of the gas separation membrane a gas-diminished retentate is generated and on the permeate side of the gas separation membrane a gas-enriched permeate is produced. The flow volume per time unit of the permeate is equal to the flow volume per time unit of the liquid being transferred.