PROCESS AND APPARATUS FOR OXYGEN PRODUCTION

WIPO Patent Application WO/2011/090506

A3

An oxygen production method and apparatus including an air separation plant and a heat exchanger in which a pumped liquid oxygen stream is heated within the heat exchanger through indirect heat exchange with compressed air to produce a pressurized oxygen product. The liquid oxygen stream is pressurized to above about 55 bar (a) and no greater than about 150 bar (a) and is a supercritical fluid after having been heated. The air is compressed to an air pressure that is a function of the oxygen pressure that will result in a minimum power being expended in the compression of the air. The heat exchanger can be a brazed fin heat exchanger fabricated from aluminum in which the fins located in heat exchange passages have an undulating configuration to increase the flow path length and induce flow separation and thereby increase the heat transfer coefficient within the heat exchanger.

JIBB RICHARD JOHN (US)
SHELAT MAULIK R (IN)
ZAMBRANO LYDA (US)

PCT/US2010/043192

June 06, 2013

July 26, 2010

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PRAXAIR TECHNOLOGY INC (US)
JIBB RICHARD JOHN (US)
SHELAT MAULIK R (IN)
ZAMBRANO LYDA (US)

F25J3/04

US20070095100A1	2007-05-03
US20080307828A1	2008-12-18

HELMUT SPRINGMANN: "Die Gewinnung von Hochdruck-Sauerstoff", LINDE BERICHTE AUS TECHNIK UND WISSENSCHAFT,, vol. 46, 1 January 1979 (1979-01-01), pages 3-7, XP001539787, ISSN: 0024-3728
CASTLE W F: "MODERN LIQUID PUMP OXYGEN PLANTS: EQUIPMENT AND PERFORMANCE", AICHE INTERSOCIETY CRYOGENIC SYMPOSIUM, XX, XX, 1 April 1991 (1991-04-01), pages 14-17, XP009057309, cited in the application

ROSENBLUM, David, M. et al. (Inc.39 Old Ridgebury Roa, Danbury CT, US)

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