Patent US3739550A successfully refreshed from Google Patents.
US3739550A
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US
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Adsorbent for desulfurization of sulfur dioxide containing waste gases
Assignee: Bergwerksverband GmbH
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Filing: 1968-10-07
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Granted: 1973-06-19
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Expires: 1988-10-07
Abstract
Abstract A carbon containing adsorbent for the desulfurization of carbon dioxide containing waste gases is impregnated with a mixed catalyst, the catalyst comprising (a) a vanadium compound and (b) at least one compound of the elements potassium, lithium or barium. The catalyst has considerably improved regeneration values.
Inventors
- 👤 K Martin
- 👤 D Zurawsky
- 👤 H Juntgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:12
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
Process according to claim 1, wherein the vanadium compound is vanadium dioxide.
Claim 2
Dependent Claim
22 words
Process according to claim 1, wherein said compound at (b) is selected from the group consisting of lithium oxide and potassium oxide.
Claim 3
Dependent Claim
24 words
Process according to claim 1, wherein said compound at (c) is selected from the group consisting of aluminum oxide, chromic oxide and titanium oxide.
Claim 4
Dependent Claim
13 words
Process according to claim 1, wherein the compound at (d) is metaphosphoric acid.
Claim 5
Dependent Claim
22 words
Process according to claim 1, wherein said adsorbent is selected from the group consisting of active charcoal, semicoke and pre-oxidized bituminous coal.
Claim 6
Dependent Claim
17 words
The process of claim 1, wherein the desulfurization is carried out at a temperature of about 100*-200*C.
Claim 7
Dependent Claim
17 words
The process of claim 1, wherein the adsorbent is regenerated in a thermal regeneration at about 400*-600*C.
Claim 8
Dependent Claim
42 words
The process of claim 1, wherein the catalyst is applied to the surface of the adsorbent in the form of an aqueous solution or suspension in an amount up to 15 percent by weight relative to the weight of the untreated adsorbent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |