Separating argon/oxygen mixtures using a structured packing

Details Separating argon/oxygen mixtures using a structured packing Separating argon/oxygen mixtures using a structured packing

F - Mech Eng,Light,Heat,Weapons

25

J

162/104

F25J 3/04 (2006.01)

Patent

CA 1280964

ABSTRACT The present invention relates to improvements to a process and apparatus for the cryogenic distillation of mixtures, which comprise oxygen, nitrogen and argon, e.g. air. The improvement comprises effectuating intimate contact of the liquid and vapor phase streams utilizing a structured packing to effectuate the intimate contact in at least those regions of the distillation column system where argon concentration is within the range from about 0.6 to about 75 volume percent, and operating the process such that the densimetric superficial gas velocity in those regions is at least 0.06 feet per second. The present invention also relates to a method for improving a cryogenic distillation apparatus having at least one distillation column for the separation of mixtures containing oxygen and argon, comprising the step of replacing the distillation trays with a structured packing in at least those regions of the distillation column system where the concentration of argon is in the range from about 0.6 to about 75 volume percent.

585327

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