Patent ID: 11879685
Assignee: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Field: Chemical engineering (Chemistry)
Classification: CPC F | IPC F

Claim 1:
2. The high-purity oxygen production system according to claim 1,
wherein the main heat exchanger is configured to cool an air feed;
wherein the medium-pressure column is in fluid communication with a cold end of the main heat exchanger and is configured to receive the starting material air from the main heat exchanger, the medium-pressure column having a medium-pressure column bottom in which a first rectification liquid is collected, a medium-pressure column rectification portion for rectifying the starting material air, and a medium-pressure column top arranged above the medium-pressure column rectification portion,
wherein the low-pressure column is arranged above the medium-pressure column, the low-pressure column having a low-pressure column bottom inside or below which is arranged a nitrogen condenser that is configured to condense a gas drawn from the medium-pressure column top and conducted by a circulation line and in which a second rectification liquid is collected, a low-pressure column rectification portion that is configured to rectify the first rectification liquid drawn from the medium-pressure column bottom, and a low-pressure column top to which is introduced at least a portion of a condensed stream condensed in the nitrogen condenser.