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

1995-02-23

1997-01-14

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62906, 62924, F25J 304

Patent

active

055928331

ABSTRACT:
In recovering pure argon product, air is separated in a rectification system, comprising at least one air separating 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 A crude argon fraction (24) is withdrawn from the crude argon column (17) and introduced at an intermediate locality into the pure argon column (25).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 From the pure argon column (25) a residual fraction (31) containing essentially nitrogen is withdrawn overhead and from the bottom a pure argon fraction (26) is withdrawn. The mass transfer in the pure argon column (25) is brought about at least in part by a packing (33, 34).

REFERENCES:
patent: 4296050 (1981-10-01), Meier
patent: 4883518 (1989-11-01), Skolaude et al.
patent: 4935044 (1990-06-01), Schoenpflug
patent: 5019145 (1991-05-01), Rohde et al.
patent: 5049173 (1991-09-01), Cormier, Sr. et al.
patent: 5076823 (1991-12-01), Hansel et al.
patent: 5207066 (1993-05-01), Bova et al.
patent: 5426946 (1995-06-01), Corduan et al.
Patent Abstracts of Japan, vol. 17, No. 517 (M-1481) (Sep. 17, 1993).

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