Ozone purification process
AssigneeThe BOC Group, Inc.
InventorsWenchang Ji, Robert James Ferrell, Arthur I. Shirley
Life of this patent
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Abstract
An ozone-oxygen gas stream is introduced into feed side of a membrane separation unit containing an elastomeric polymer membrane. Ozone-enriched gas passes through the membrane to a permeate zone and is contacted with an ozone-reactive substance-containing gas stream in the permeate zone, thereby oxidizing the substances or is removed from the permeate zone. Removal of the ozone-enriched gas from the permeate zone may be effected by purging the permeate zone with an inert gas and/or evacuating the permeate zone. Ozone-enriched gas removed from the permeate zone may be mixed with a liquid or gas stream which contains ozone-reactive substances in, for example, a venturi device, thereby oxidizing the substances.
Claims33
A process comprising the steps:
- (a) introducing a gas mixture comprising ozone and oxygen into the feed zone of gas separation means comprising a feed zone and a permeate zone separated by an ozone-permeable membrane comprising an elastomeric polymer, silica or combinations thereof, thereby permeating an ozone-enriched gas into said permeate zone and producing an oxygen-enriched gas in said feed zone;
- (b) removing said oxygen-enriched gas from said feed zone;
- and
- (c) removing ozone from said permeate zone.
Apparatus for mixing a fluid with a gas comprising:
- (a) gas separation means having a gas mixture inlet, a first separated gas outlet and a second separated gas outlet, said gas separation means being adapted to separate a gas mixture introduced thereinto through said gas mixture inlet into a first separated gas and a second separated gas and to discharge said first separated gas through said first separated gas outlet and said second separated gas through said second separated gas outlet;
- (b) a carrier fluid-first separated gas mixing device having a carrier fluid inlet, a first separated gas inlet, a mixture outlet and a venturi connected to said carrier fluid inlet, said first separated gas inlet and said mixture outlet, said mixing device being adapted to cause a stream of carrier fluid passing through said venturi at superatmospheric pressure to draw first separated gas into said carrier fluid and discharge carrier fluid-first separated gas mixture from said mixing device through said mixture outlet;
- (c) first fluid flow means connecting said first separated gas outlet of said gas separation means to said first separated gas inlet of said mixing device;
- and
- (d) second fluid flow means adapted to provide a carrier fluid to said carrier fluid inlet of said gas mixing device at superatmospheric pressure.
Dependencies are inferred from the claim text.