Method for extracting argon by low-temperature air separation

F - Mech Eng,Light,Heat,Weapons – 25 – J

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F25J 3/04 (2006.01)

Patent

CA 2502706

The invention relates to a method for extracting argon by low-temperature air separation. To this end, the rectifying system (2, 4) comprises at least one air separation column (4) subdivided into a first and second partial section (6, 7) by a partition (5) extending in a longitudinal direction of the column. A fluid (3) containing oxygen and argon is introduced into the first partial section (6), and a flow (13) containing oxygen and argon and having an argon concentration ranging from 15 % to 50 % is withdrawn from the second partial section (7).

L'invention concerne un procédé permettant de produire de l'argon par séparation de l'air à basse température. Le système de rectification (2, 4) présente au moins une colonne de séparation de l'air (4) qui comporte une cloison de séparation (5) s'étendant dans le sens longitudinal de la colonne. La colonne de séparation de l'air (4) se trouve ainsi subdivisée à la hauteur de la cloison de séparation (5), en une première et en une seconde section partielle (6, 7). Un fluide (3) contenant de l'oxygène et de l'argon est introduit dans la première section partielle (6). Un courant (13) contenant de l'oxygène et de l'argon et dont la concentration en argon est comprise entre 15 et 30 % est prélevé de la seconde section partielle.

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