Linde Aktiengesellschaft

Akos Tota

Christian Voss

Martin Bauer

Werner Leitmayr

Holger Schmigalle

Christian Thaller

Ernst Haidegger

Frank Jennewein

Harald Schmaderer

Volker Witzleb

Nicole SCHÖDEL

A method of obtaining helium from a process gas. The process gas is at a pressure less than 15 bar to a first membrane separation stage having a first membrane more readily permeable for helium than for at least one other component in the process gas. A first retentate stream is fed to a second membrane separation stage having a second membrane more readily permeable for helium than for at least one other component in the process gas. Helium is separated from a first helium-containing permeate stream using a pressure swing adsorption to obtain a helium-containing product stream. A second helium-containing permeate stream is recycled to the first membrane separation stage. A purge gas from the pressure swing adsorption is also recycled to the first membrane separation stage.

Combined membrane-pressure swing adsorption method for recovery of helium

A method of cleaning a stream of matter that includes a C2+ fraction and a first gaseous substance and a second gaseous substance. The stream of matter is subjected to a pressure swing adsorption to remove the C2+ fraction by means of a membrane to obtain a retentate and a permeate. The first substance is enriched in retentate and depleted in permeate and the second substance is depleted in retentate and enriched in permeate.

Recovery of gases, especially permanent gases, from streams of matter, especially from offgas streams from polymerizations

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Munich, Germany

Akos Tota