Patent ID: 6295840
Filing Date: 2001-10-02
Classification: F25J

Abstract:
A method for the separation of air to provide at least one pressurized product enriched in a component of air, which method comprises:(a) providing a pressurized, substantially contaminant-free air feed stream;(b) cooling at least a portion of the contaminant-free air feed stream to provide a cooled air feed stream, and separating the cooled air feed stream in a cryogenic air separation system to provide an intermediate liquid product stream enriched in at least one of the components of air;(c) introducing at least a portion of the intermediate liquid product stream into a vessel;(d) pressurizing the vessel by introducing a pressurized fluid into the vessel;(e) withdrawing from the vessel a pressurized liquid product enriched in one of the components of air; and(f) repeating (c), (d), and (e) in a cyclic manner.