Vaporization of liquid oxygen for increased argon recovery

Refrigeration – Processes – Circulating external gas

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62 24, 62 40, F25J 304

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active

052555224

ABSTRACT:
The present invention relates to an improvement for the production of argon from cyrogenic air separation processes. In particular, the improvement comprises satisfying a portion of the crude argon column condensing duty with refrigeration provided from the vaporization of a portion of the liquid oxygen from the bottom of the low pressure column.

REFERENCES:
patent: 4670031 (1987-06-01), Erickson et al.
patent: 4756731 (1988-07-01), Erickson
patent: 4822395 (1989-04-01), Cheung
patent: 4932212 (1990-06-01), Rohde
patent: 5034043 (1991-07-01), Rottmann
patent: 5076823 (1991-12-01), Hansel et al.
patent: 5081845 (1992-01-01), Allam et al.
R. E. Latimer, Distillation of Air, Feb. 1967, pp. 35-59.

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