System and method for cryogenic air separation using four distillation columns including an intermediate pressure column

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12209802
APP PUB NO 20240035745A1
SERIAL NO

17875583

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Abstract

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A system and method for separating air by cryogenic distillation using a four column arrangement including a higher pressure column, a lower pressure column, an intermediate pressure column, and an argon column is provided. The disclosed system and method is particularly suited for production of normal purity oxygen and employs a once-through kettle column reboiler, a once-through kettle column condenser, and a once-through argon condenser. The once through argon condenser is disposed within the lower pressure column where an argon-rich vapor stream is condensed against the descending liquid in the lower pressure column.

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Patent Owner(s)

  • PRAXAIR TECHNOLOGY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Prosser, Neil M Lockport, US 51 203

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