PROCESS AND PLANT FOR THE COMBINATION PRODUCTION OF A MIXTURE OF HYDROGEN AND NITROGEN AND ALSO OF CARBON MONOXIDE BY CRYOGENIC DISTILLATION AND CRYOGENIC SCRUBBING

摘要

Process for the combined production of a mixture of hydrogen and nitrogen, and of carbon monoxide by cryogenic distillation and cryogenic scrubbing, wherein a methane-rich liquid is introduced at a first intermediate level of a scrubbing column as first scrubbing liquid and at least one nitrogen-rich liquid is introduced at a level higher than the first level of the scrubbing column as second scrubbing liquid and a mixture of hydrogen and nitrogen is drawn off as overhead gas from the scrubbing column.