F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/02 (2006.01)
Patent
CA 2049499
ARGON RECOVERY FROM PARTIAL OXIDATION BASED AMMONIA PLANT WASTE GASES ABSTRACT OF THE DISCLOSURE 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. In a third 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 methane and to produce a fraction containing an increased amount of argon as a distillate product, and (b) passing the argon fraction to a second cryogenic fractional distillation system to remove nitrogen, hydrogen, and carbon monoxide as a distillate product and to produce a pure argon product.
Andrecovich Mark J.
Krishnamurthy Ramachandran
Maclean Donald L.
Wright Karen J.
Gowling Lafleur Henderson Llp
The Boc Group Inc.
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