Cyclic membrane separation process

Details Cyclic membrane separation process Cyclic membrane separation process

2005-05-03

2005-05-03

Spitzer, Robert H. (Department: 1724)

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

C095S047000, C095S054000

Reexamination Certificate

active

06887300

ABSTRACT:
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 the first part 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 second part, the membrane is inoperative while gas pressure rises in the ullage. In one aspect of this invention, a vacuum is drawn in the membrane separation unit thus reducing overall VOC emissions.

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Developing Technology for Enhanced Vapor Recovery:Part 1-Vent Processors, Koch, W.H., Technology Resources International, Inc., Feb., 2001.

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