Patent ID: 11885562
Assignee: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  C | IPC B  F

Claim 0:
1. A method for separating argon by cryogenic distillation, in which:
a flow containing argon, oxygen and nitrogen and being richer in argon than the air is sent to a distillation column, and
an argon-rich gas flow is withdrawn at the top of the column,, comprising, mixing a portion of the argon-rich gas flow with beads having a diameter of less than 5 mm to form a gas mixture containing beads, the beads being made of an adsorptive material or coated with an adsorptive material, the adsorptive material being capable of adsorbing oxygen in the presence of argon at the column operating temperatures; condensing the portion of the argon-rich gas flow mixed with the beads and then sending the condensed portion to the top of the column; and withdrawing a bottom liquid containing beads from the column and treating the withdrawn liquid to remove the beads, regenerating the beads removed to remove the adsorbed oxygen and mixing the regenerated beads with the portion of the argon-rich gas flow.