US4780277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for subjecting gases to discharge treatment
Assignee: Shinryo Corp
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Filing: 1986-05-05
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Granted: 1988-10-25
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Expires: 2006-05-05
Abstract
Abstract A waste gas in treated by the sequence of discharge treatment and catalytic oxidation. A microbe-containing gas is disinfected by first mixing it with ozone, then subjecting the gas to discharge treatment and catalytic reaction successively.
Inventors
- 👤 Toshio Tanaka
- 👤 Yasuaki Nagashima
- 👤 Masato Sumiya
- 👤 Shinji Hosono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; A; A61; A61L; A61L9/00; A61L9/015; A61L9/16; A61L9/22; B01J2219/00; B01J2219/08; B01J2219/0803; B01J2219/0805; B01J2219/0845; B01J2219/0847; B01J2219/0849
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
58 words
A sterilization method which comprises: adding ozone to a gas containing microorganisms; introducing the resulting ozone-containing gas into a discharge zone so as to produce plasma in the gas; and supplying the resulting treated gas into a catalytic reaction zone at ordinary ambient temperature such that a gas which is substantially free from ozone and microorganisms is obtained.
Claim 2
Dependent Claim
58 words
A sterilization method which comprises: adding ozone to a gas containing microorganisms; introducing the resulting ozone-containing gas into a discharge zone so as to produce plasma in the gas; and supplying the resulting treated gas into a catalytic reaction zone at ordinary ambient temperature such that a gas which is substantially free from ozone and microorganisms is obtained.
Claim 3
Dependent Claim
11 words
A method according to claim 1 wherein said gas is air.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein the ozone is added in an amount of 10 to 5,000 ppm.
Claim 5
Dependent Claim
18 words
A method according to claim 1 wherein a glow or corona discharge is produced in said discharge zone.
Claim 6
Dependent Claim
36 words
A method according to claim 1 wherein a catalyst selected from the group consisting of zeolite, a silica-alumina catalyst, activated carbon, and a lead-, zinc-, copper- or nickel-supporting catalyst is employed in said catalytic reaction zone.
Claim 7
Dependent Claim
79 words
A sterilization method which comprises: performing surface sterilization in working space by supplying ozone thereinto; after completion of the surface sterilization, drawing the ozone-containing gas from the working space and introducing it into a discharge zone so as to produce plasma in said gas; supplying the resulting treated gas into a catalytic reaction zone at ordinary ambient temperature such that a gas which is substantially free from ozone is obtained; and returning said ozone-free gas to said working space.
Claim 8
Dependent Claim
79 words
A sterilization method which comprises: performing surface sterilization in working space by supplying ozone thereinto; after completion of the surface sterilization, drawing the ozone-containing gas from the working space and introducing it into a discharge zone so as to produce plasma in said gas; supplying the resulting treated gas into a catalytic reaction zone at ordinary ambient temperature such that a gas which is substantially free from ozone is obtained; and returning said ozone-free gas to said working space.
Claim 9
Independent Claim
54 words
A method of treating a noxious component in a waste gas by oxidation which comprises first introducing the waste gas into a discharge zone to form a plasma-containing gas and then introducing said plasma-containing gas into a catalytic reaction zone so as to allow said noxious components to enter into a catalytic oxidation reaction.
Claim 10
Independent Claim
54 words
A method of treating a noxious component in a waste gas by oxidation which comprises first introducing the waste gas into a discharge zone to form a plasma-containing gas and then introducing said plasma-containing gas into a catalytic reaction zone so as to allow said noxious components to enter into a catalytic oxidation reaction.
Claim 11
Dependent Claim
15 words
A method according to claim 7 wherein said waste gas is at ordinary ambient temperature.
Claim 12
Dependent Claim
21 words
A method according to claim 7 wherein said waste gas has a temperature in the range of 40° to 100° C.
Claim 13
Dependent Claim
18 words
A method according to claim 7 wherein a glow or corona discharge is produced in said discharge zone.
Claim 14
Dependent Claim
36 words
A method according to claim 7 wherein a catalyst selected from the group consisting of zeolite, a silica-alumina catalyst, activated carbon, and a lead-, zinc-, copper- or nickel-supporting catalyst is employed in said catalytic reaction zone.
Claim 15
Dependent Claim
24 words
A method according to claim 7 wherein ozone is added to said waste gas prior to introducing the waste gas into the discharge zone.
Claim 16
Dependent Claim
14 words
A method according to claim 7 wherein said noxious component is a malodorous component.
Claim 17
Dependent Claim
27 words
A method according to claim 13 wherein said malodorous component is at least one member selected from the group consisting of mercaptan, hydrogen sulfide, ammonia and trimethylamine.
Claim 18
Dependent Claim
14 words
A method according to claim 7 wherein said noxious component is an organic solvent.
Claim 19
Dependent Claim
35 words
A method according to claim 15 wherein said organic solvent is at least one member selected form the group consisting of enzene, toluene, xylene, ethylene glycol monobutyl ether, methyl ethyl ketone, and methyl isobutyl ketone.
Claim 20
Dependent Claim
15 words
A method according to claim 7 wherein said noxious component is a gasous inorganic oxide.
Claim 21
Dependent Claim
29 words
A method according to claim 17 wherein said gaseous inorganic oxide is at least one member selected from the group consisting of NO x , SO x and CO.
References Cited (Backward Citations)
GB1573802A
Cited
JPS5423147A
Cited
JPS56108511A
Cited
US4315837A
Cited
US4551304A
Cited
US4348357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |