The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1992
Filed:
Sep. 25, 1991
Harold L Dinsmore, Tulsa, OK (US);
Michael I Lishnevsky, Tulsa, OK (US);
Willard N Tuttle, Tulsa, OK (US);
John Zink Company, a division of Koch Engineering Co., Inc., Tulsa, OK (US);
Abstract
An improved process for recovering hydrocarbons from an air-hydrocarbon vapor mixture such as the mixture of air and vaporized light hydrocarbon compounds expelled as a result of loading gasoline, benzene or the like into storage tanks and tank trucks. The air-hydrocarbon vapor mixture is caused to flow through a bed of solid adsorbent whereby the hydrocarbons are removed from the mixture and a residue gas stream comprised of substantially hydrocarbon-free air is produced. The substantially hydrocarbon-free air is vented to the atmosphere and a second bed of solid adsorbent having hydrocarbons adsorbed thereon is subjected to conditions which cause desorption of the hydrocarbons and thereby regeneration of the bed. The regeneration of the bed is accomplished by evacuating the bed by means of liquid seal pump vacuum pumping whereby a major portion of the hydrocarbons are desorbed therefrom and subsequently subjecting the bed to further evacuation by both positive displacement booster pump vacuum pumping and by liquid seal pump vacuum pumping whereby additional hydrocarbons are desorbed therefrom.