Process and apparatus for the recovery of pure argon

Details Process and apparatus for the recovery of pure argon Process and apparatus for the recovery of pure argon

C - Chemistry, Metallurgy

01

B

C01B 23/00 (2006.01) F25J 3/02 (2006.01) F25J 3/04 (2006.01)

Patent

CA 2142317

The process and the apparatus serve for the recovery of pure argon. Air is separated in a rectification system, comprising at least one air separation column (9), a crude argon column (17) and a pure argon column (25). A crude argon fraction (24) is withdrawn from the crude argon column (17) and introduced at an intermediate locality into the pure argon column (25). The head of the pure argon column (25) is cooled by indirect heat exchange (29). From the pure argon column (25) a residual fraction (31) containing essentially nitrogen is withdrawn overhead and from the bottom a pure argon fraction (26) iswithdrawn. The mass transfer in the pure argon column (25) is brought about at least in part by a packing (33, 34).

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