Air Products and Chemicals, Inc.

Alan D Abel

William Paul Schmidt

Ravi Kumar

William Emil Waldron

Theodore F Wells

An apparatus and method for regulating flow of product gas from a sorptive separation apparatus, especially during periods of discontinuous product supply and variable demand is set forth.

Control of product withdrawal from a sorptive separation system

A process is described for recovery of a more selectively adsorbed key component from a gas mixture containing the key component and one or more less selectively adsorbed secondary components using vacuum swing adsorption. The process minimizes capital costs by reducing or eliminating gas storage vessels and reduces power requirements by operating without a feed compressor or elevated pressure feed, whereby feed is induced at least in part by vacuum conditions achieved by pressure equalization between parallel adsorption beds. Alternatively, at least a minor amount of less selectively adsorbed secondary component roduct can be recovered.

Adsorptive separation utilizing multiple adsorption beds

A process is described for nitrogen recovery from air using vacuum swing adsorption. The process minimizes capital costs by reducing or eliminating gas storage vessels and reduces power requirements by operating without an air feed compressor or elevated pressure feed, whereby air feed is induced by vacuum conditions achieved by pressure equalization between parallel adsorption beds. Alternatively, a minor amount of oxygen product can be recovered.

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Allentown, PA, United States of America

Alan D Abel