Jon W Young

US Patent:

44628110, Jul 31, 1984

Filed:

Jul 26, 1983

Appl. No.:

6/517600

Inventors:

Harold L. Dinsmore - Tulsa OK
Jon W. Young - Broken Arrow OK

Assignee:

John Zink Company - Tulsa OK

International Classification:

B01D 5304

US Classification:

55 18

Abstract:

Apparatus for recovering hydrocarbons from an air-hydrocarbon vapor mixture of the type including a pair of alternatively used carbon bed adsorbers which are used to remove hydrocarbon vapors from the mixture and which are desorbed of hydrocarbons by subjecting the beds alternatively to vacuum regeneration using a vacuum pump the output of which is passed through an absorber using liquid gasoline as the absorbent liquid. The efficiency of the process is increased by interrupting the flow of the absorbent liquid during the initial period of the regeneration during which period the hydrocarbon vapor content of the mixture is low due to the fact that a substantial vacuum is required to separate the hydrocarbons from the carbon bed.