Separation of gaseous components from a gaseous mixture by physical scrubbing

US4324567A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Gerhard Ranke · Pöcking, DE
• Horst Weiss · Karlsruhe, DE

Key dates

• Filing date: Dec 26, 1979
• Grant date: Apr 13, 1982
• Expiry date: Dec 26, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2203/0485
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for separating and obtaining as product gases at least two gaseous components from a gaseous mixture containing same by scrubbing with a physical scrubbing liquid exhibiting a higher dissolving power for at least one of the components to be separated than for at least one other of these components, wherein a first scrubbing liquid stream, loaded with all of the components to be separated, and a second scrubbing liquid stream, merely containing proportions of the less soluble component or components, are withdrawn from the scrubbing stage; a gaseous fraction is liberated by expansion of the first scrubbing liquid stream, freed of the more soluble component or components by treatment with the second, likewise expanded scrubbing liquid stream and withdrawn as a first product stream; and the scrubbing liquid streams are finally subjected to a separation of the more soluble components as well as of residual proportions of the less soluble components, thus obtaining a second product gas, the improvement which comprises further expanding the scrubbing liquid streams to obtain a gaseous fraction prior to the separation serving for obtaining the second product gas, recompressin…