Process for the production of oxygen by cryogenic distillation
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorYves Koeberle
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Abstract
Process for the production of oxygen by cryogenic distillation of a supply mixture containing oxygen and nitrogen in a double column (5) comprising a medium pressure column (6) and a low pressure column (7), in which there is partially condensed at least one fraction of the supply mixture in a condenser (8) by vaporization of liquid oxygen from the base of the low pressure column (7), said partially condensed mixture is sent to the medium pressure column (6), all the oxygen destined to form the gaseous production being withdrawn in liquid phase from the base of the low pressure column (7), and brought to its utilization pressure.
Claims9
Process for the production of oxygen by cryogenic distillation of a supply mixture containing oxygen and nitrogen in a double column comprising a medium pressure column and a low pressure column, comprising withdrawing all the oxygen destined to form a gaseous production in liquid phase from the base of the low pressure column, pumping said withdrawn oxygen in liquid phase to a utilization pressure, condensing less than 30% of at least one fraction of the supply mixture in a condenser by vaporization of said liquid oxygen, and sending said partially condensed mixture to the medium pressure column.
Dependencies are inferred from the claim text.