Skip to Content
Find More Like This
Return to Search

Cyclic membrane separation process

United States Patent

April 13, 2004
View the Complete Patent at the US Patent & Trademark Office
A cyclic process for controlling environmental emissions of volatile organic compounds (VOC) from vapor recovery in storage and dispensing operations of liquids maintains a vacuum in the storage tank ullage. In one of a two-part cyclic process ullage vapor is discharged through a vapor recovery system in which VOC are stripped from vented gas with a selectively gas permeable membrane. In the other part, the membrane is inoperative while gas pressure rises in the ullage. Ambient air is charged to the membrane separation unit during the latter part of the cycle.
Bowser; John (Newark, DE)
CMS Technology Holdings, Inc. (Wilmington, DE)
10/ 350,867
January 24, 2003
Support was provided under Department of Energy grant DE-FG02-00ER82976. The U.S. government has rights in the patent application.