| PATENT ASSIGNEE'S COUNTRY | France |
| UPDATE | 08.00 |
| PATENT ASSIGNEE | Air Liquide SA |
| PATENT CLAIMS |
Process for sepn air by cryogenic distn in a single column having a boiler at the bottom of said column, which comprises - Sending air to be distilled into single column where the air is separated into N-enriched vapor & O-enriched liquid - Heating the base of the column with the boiler - Withdrawing from the column at least some of the O-enri ched liquid - Pressurizing & vaporizing withdrawn oxygen-enriched li quid by heat exchange with a pressurized flow The IMPROVEMENT which comprises heating the boiler with an air flow |
| PATENT PHOTOCOPY | Available on request |
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