Patent ID: 6318120
Filing Date: 2001-11-20
Classification: F25J,Y10S

Abstract:
A process for production of oxygen enriched fluid and argon enriched fluid by cryogenic distillation of air comprising the steps of:a) sending a feed stream containing nitrogen, oxygen and argon to a main column system wherein it in separated by cryogenic distillaton;b) removing an argon containing gaseous stream from a column of the main column system, said column operating at a pressure of at least 2 bar abs., and at least partially condensing the argon containing gaseous stream;c) sending at least part of the at least partially condensed argon containing gaseous stream to an intermediate point of an argon column; andd) removing an argon enriched product stream from the top of the argon column and a first oxygen enriched product stream from the bottom of the argon column.