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US 5,490,871 AGranted
Gas separation
AssigneeThe BOC Group, Inc.
InventorsJohn R. Coates, Paul W. Kingston
Life of this patent
Estimating the term…
Abstract
During a purge step of a PSA plant the waste gas being vented is analyzed to identify when a preselected volume of the waste gas contains purge gas after which the purge step is stopped.
Claims3
A pressure swing adsorption method of producing a product gas from a feed gas mixture including the product gas comprising repeatedly performing a cycle of operations which includes the steps of:
- a) contacting the feed gas mixture with a bed of adsorbent material which adsorbs preferentially at least one other component of the feed gas mixture relative to the product gas. thereby producing said product gas as nonadsorbed component;
- b) desorbing the bed;
- c) purging the bed with said product gas;
- d) sensing when the gas leaving the bed during the purging step contains a preselected volume of said product gas;
- and
- e) on reaching the preselected volume stopping the purge step.
3 more elements
Dependencies are inferred from the claim text.