Dual heat pump cycles for increased argon recovery

Details Dual heat pump cycles for increased argon recovery Dual heat pump cycles for increased argon recovery

1992-02-13

1993-10-26

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

60 3912, 62 24, 62 40, F25J 304

Patent

active

052555240

ABSTRACT:
The present invention relates to an improvement for the production of argon from cryogenic air separation processes. In particular, the improvement comprises using a first heat pump cycle to transfer refrigeration from the bottom of the low pressure column to the top of the crude argon column and a second heat pump cycle to transfer refrigeration from the bottom of the low pressure column to the top of the low pressure column.

REFERENCES:
patent: 4575388 (1986-03-01), Okada
patent: 4615716 (1986-10-01), Cormier et al.
patent: 4670031 (1987-06-01), Erickson
patent: 4783208 (1988-11-01), Rathbone
patent: 4790866 (1988-12-01), Rathbone
patent: 4822385 (1989-04-01), Cheung
patent: 4832719 (1989-05-01), Erickson
patent: 4932212 (1990-06-01), Rohde
patent: 5069699 (1991-12-01), Agrawal
patent: 5081845 (1992-01-01), Allam et al.
R. E. Latimer, Distillation of Air, Feb. 1969, 35-59.

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