Air Products and Chemicals, Inc.

Harris, Christopher F.

Patel, Suresh U.

Suchdeo, Shyam R.

Suresh U Patel

Christopher Francis Harris

Shyam Ramchand Suchdeo

Keith B Wilson

Thomas E Cormier

A cryogenic distillative separation of air to recover nitrogen in large quantities and at relatively high pressure wherein a portion of the nitrogen reflux for the distillation is achieved by heat exchanging nitrogen gas in a side reboiler against waste oxygen at reduced pressure.

Tonnage nitrogen air separation with side reboiler condenser

A process is described in which gaseous nitrogen is recovered from air in a cryogenic air separation unit containing a single distillation column wherein the product nitrogen is compressed and a portion of the compressed nitrogen is recycled to the column to provide reboil in the bottom of said column and reflux at the top of said column. A waste crude oxygen stream is expanded to provide refrigeration for the air separation unit.

Nitrogen generator cycle

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Whitehall, PA, United States of America

Suresh U Patel