The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2023
Filed:
Apr. 19, 2021
James R. Handley, East Amherst, NY (US);
Richard C. Cyganovich, North Tonawanda, NY (US);
Cem E. Celik, Grand Island, NY (US);
Brian S. Powell, Williamsville, NY (US);
Devang Ashok Dasani, Buffalo, NY (US);
James R. Handley, East Amherst, NY (US);
Richard C. Cyganovich, North Tonawanda, NY (US);
Cem E. Celik, Grand Island, NY (US);
Brian S. Powell, Williamsville, NY (US);
Devang Ashok Dasani, Buffalo, NY (US);
PRAXAIR TECHNOLOGY, INC., Danbury, CT (US);
Abstract
A system and method of regenerating a pre-purification vessel is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit that uses an oxygen-enriched purge gas stream for regeneration of the pre-purification unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the water, carbon dioxide and other impurities from a feed air stream, optionally including hydrogen and carbon monoxide impurities. The method of regenerating a pre-purification vessel preferably involves regenerating the pre-purification vessel with an oxygen-enriched purge gas after depressurization of the vessel and thereafter partially repressurizing the pre-purification vessel with an auxiliary purge gas thereby diluting the oxygen concentration of the gases contained in the pre-purification vessel and optionally depressurizing the partially repressurized vessel.