US4259299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing ozone from an ozone-containing gas
Assignee: Osaka Oxygen Industries Ltd
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Filing: 1979-03-27
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Granted: 1981-03-31
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Expires: 1999-03-27
Abstract
Abstract A process for removing ozone from an ozone-containing gas which comprises treating the gas with a molded product obtained by the following steps, (a) wet-blending powdery or particulate activated carbon and zeolite in the presence of an organic binder and/or an inorganic binder, (b) molding the resulting blend, (c) drying the molded product, and (d) calcining the molded product at a temperature at which the network structure of the zeolite is not broken is disclosed.
Inventors
- 👤 Zenzi Hagiwara
- 👤 Iwao Uenoyama
- 👤 Hiroo Ishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:24
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/082; B01J29/084; B01J29/18; B01J29/70; B01J29/7003; B01J29/80; B01J2229/00; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A process for removing ozone from an ozone-containing gas which comprises treating the gas with a calcined molded product composed of activated carbon-zeolite mixture, the ratio of the activated carbon to the zeolite being in the range of from 0.2 to 9.0, obtained by effecting the steps of (a) wet-blending powdery or particulate activated carbon and zeolite in the presence of an organic binder and/or an inorganic binder, (b) molding the resulting blend, (c) drying the molding, and (d) calcining the molding at a temperature in the range of from 170° C. to a temperature at which network structure of zeolite is not broken.
Claim 2
Dependent Claim
104 words
A process for removing ozone from an ozone-containing gas which comprises treating the gas with a calcined molded product composed of activated carbon-zeolite mixture, the ratio of the activated carbon to the zeolite being in the range of from 0.2 to 9.0, obtained by effecting the steps of (a) wet-blending powdery or particulate activated carbon and zeolite in the presence of an organic binder and/or an inorganic binder, (b) molding the resulting blend, (c) drying the molding, and (d) calcining the molding at a temperature in the range of from 170° C. to a temperature at which network structure of zeolite is not broken.
Claim 3
Dependent Claim
18 words
The process as defined in claim 1 wherein the calcination is carried out in an inert gas atmosphere.
Claim 4
Dependent Claim
35 words
The process as defined in claim 1 wherein the calcination is carried out at a temperature in the range of from 350° C. to a temperature at which network structure of zeolite is not broken.
Claim 5
Dependent Claim
28 words
The process as defined in claim 1 wherein the zeolite is selected from the group consisting of mordenite, clinoptilolite, X-type zeolite, Y-type zeolite, A-type zeolite and mixtures thereof.
Claim 6
Dependent Claim
16 words
The process as defined in claim 1 wherein the ozone-containing gas is in a dry state.
Claim 7
Dependent Claim
15 words
The process as defined in claim 1 wherein the ozone-containing gas is a wet state.
References Cited (Backward Citations)
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Cited
US2980494A
Cited
US3219590A
Cited
US3025233A
Cited
US3516783A
Cited
US3407617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |