Praxair Technology, Inc.

The Boc Group, Inc.

Craig Steven LaForce

Raymond Francis Drnevich

Neil Mark Prosser

Joseph Paul Naumovitz

Gerald A Paolino

Rong-Jwyn Lee

A method of producing gaseous oxygen in accordance with a variable demand cycle in which pumped liquid oxygen from a double column air separation unit is vaporized within a mixing column. During low demand phases, excess liquid oxygen is stored within a storage tank and used to augment the liquid oxygen to vaporized during the high demand phase. Reflux to the lower pressure column of the air separation unit is kept constant by storing liquid with column bottoms produced within the mixing column during the high demand phase for use in the low demand phase when less liquid oxygen is vaporized and therefore less column bottoms is produced in the mixing column.

Method of producing gaseous oxygen at variable rate

A system which integrates a cryogenic air separation plant with a blast furnace system enabling efficient oxygen enrichment of the blast air, and, if desired, production of additional higher purity oxygen.

Cryogenic air separation blast furnace system

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Whitehouse Station, NJ, United States of America

Craig Steven LaForce