Dale A. Lagree - Williamsville NY David R. Thompson - Grand Island NY
Assignee:
Praxair Technology, Inc. - Danbury CT
International Classification:
B01D 5322 B01D 5304
US Classification:
55 16
Abstract:
The waste gas of PSA-air separation operations is passed to a membrane system for enhanced recovery of a second product. By capturing the portion found to contain a high concentration of either nitrogen or oxygen in the waste stream, the efficiency of the overall separation is enhanced.
Dual Product Pressure Swing Adsorption Process And System
Frederick W. Leavitt - Tonawanda NY James Smolarek - Boston NY Dale A. Lagree - Williamsville NY
Assignee:
Praxair Technology, Inc. - Danbury CT
International Classification:
B01D 5304
US Classification:
55 18
Abstract:
By capturing the portion found to contain a high concentration of either oxygen or nitrogen in the non-primary waste stream from a PSA-air separation operation, a high purity second product stream can be obtained.
Pressure Swing Adsorption Process For Gas Separation
Dale A. Lagree - Williamsville NY Frederick W. Leavitt - North Tonawanda NY
Assignee:
Union Carbide Corporation - Danbury CT
International Classification:
B01D 5304
US Classification:
55 26
Abstract:
An improved pressure swing adsorption process enables the more readily adsorbable component of a feed gas to be economically recovered, e. g. nitrogen from air. The more readily absorbable component is used as copurge at upper adsorption pressure, and less readily adsorbable component is used for countercurrent purge at subatmospheric desorption pressure and for initial repressurization in a countercurrent backfilling step.