Air separation process and apparatus for high argon recovery and

Refrigeration – Processes – Circulating external gas

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62 24, 62 33, 62 41, F25J 304

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active

048223956

ABSTRACT:
Process and apparatus to produce argon at high recovery with nitrogen at higher than conventional pressure comprising three columns wherein first column bottoms are passed into the second column, second column bottoms drive a third column top condenser, and argon-containing fluid is passed for separation into the third column from the second column at a point intermediate the points where first column bottoms enter and second column bottoms exit the second column.

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patent: 4747659 (1988-05-01), Gladmen et al.
Latimer, R. E., Distillation of Air, Chemical Engineering Progress, Feb. 1967, pp. 35-59.

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