Method for preparing a krypton / xenon-enriched stream directly from a main air distillation column

摘要

The present invention relates to a cryogenic air separation process for producing a krypton / xenon-enriched stream directly from a main air distillation column wherein the top bypass is presented at the lower end of the low pressure column to remove the majority of the methane in the oxygen gas product Concentrate krypton and xenon. [Selectivity] First degree