Refrigeration – Processes – Circulating external gas
Patent
1990-08-30
1992-03-31
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
55 66, 62 24, 62 40, F25J 304
Patent
active
051004470
ABSTRACT:
The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a pressure swing adsorption system to remove carbon monoxide, methane and part of the nitrogen thereby producing a fraction containing an increased amount of argon, and (b) passing the argon fraction to a cryogenic fractional distillation system to remove hydrogen and the remaining nitrogen in the fraction as a distillate product and to produce a pure argon product. In a second embodiment, the invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a first cryogenic fractional distillation system to remove carbon monoxide, hydrogen, and nitrogen as distillate products and to produce a fraction containing an increased amount of argon, and (b) passing the argon fraction to a second cryogenic fractional distillation system to remove methane and to produce pure argon as a distillate product.
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Andrecovich Mark J.
Krishnamurthy Ramachandran
Maclean Donald L.
Wright Karen J.
Capossela Ronald C.
Pearlman Robert I.
Reap Coleman R.
The BOC Group Inc.
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