US3933979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas purifying method
Assignee: GEA Group AG
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Filing: 1973-08-23
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Granted: 1976-01-20
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Expires: 1993-08-23
Abstract
Abstract Hydrogen containing gases are purified to remove components therein having polymerization, resinification or coking tendencies or to transform such compounds into harmless compounds. The sulfur content of the hydrogen containing gas is adjusted by adding sulfur or sulfur compounds such that the sulfur content is at least 0.05 to 8 g/Nm 3 . The adjusted gas is then passed through a hydrogenation catalyst at temperatures between 100° and 400°C. Suitable hydrogenation catalysts are one or more sulfides and/or oxides of metals of the 6th and 8th Group of the periodic system.
Inventors
- 👤 Karl-Heinz Eisenlohr
- 👤 Berthold Scholz
- 👤 Ernest Kapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; C; C01; C01B; C01B3/00; C01B3/50; C01B3/56; C01B3/58; B01D2251/00; B01D2251/50; B01D2251/51; B01D2256/00; B01D2256/16; B01D2257/00; B01D2257/40; B01D2257/404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
A method for purifying hydrogen-containing gases which also contain nitrogen oxides to remove the nitrogen oxides from such gas which comprises adjusting the sulfur content of the hydrogen containing gas to 0.05 to 8 g/Nm 3 or more by adding sulfur or sulfur compounds thereto and passing this adjusted gas over a hydrogenation catalyst at a temperature between 100° and 400°C.
Claim 2
Independent Claim
61 words
A method for purifying hydrogen-containing gases which also contain nitrogen oxides to remove the nitrogen oxides from such gas which comprises adjusting the sulfur content of the hydrogen containing gas to 0.05 to 8 g/Nm 3 or more by adding sulfur or sulfur compounds thereto and passing this adjusted gas over a hydrogenation catalyst at a temperature between 100° and 400°C.
Claim 3
Dependent Claim
17 words
Method of claim 1 wherein hydrogen sulfide and/or salts of hydrogen sulfide are added as sulfur compounds.
Claim 4
Dependent Claim
13 words
Method of claim 1 wherein carbon disulfide is added as the sulfur compound.
Claim 5
Dependent Claim
20 words
Method of claim 1 wherein the sulfur compounds are added in the form of gases or liquids containing such compounds.
Claim 6
Dependent Claim
15 words
Method of claim 1 wherein water vapor is additionally added when CO-rich gases are cleaned.
Claim 7
Dependent Claim
33 words
Method of claim 1 wherein the hydrogenating catalysts are selected from the group consisting of one or more sulfides and/or oxides of metals of the 6th and 8th Group of the Periodic System.
Claim 8
Dependent Claim
19 words
A process according to claim 1 wherein said hydrogenation catalyst is a MoO 3 -CoO-Al 2 O 3 catalyst.
Claim 9
Dependent Claim
15 words
A process according to claim 1 wherein said hydrogen-containing gas stream also contains an olefin.
References Cited (Backward Citations)
CA714483A
Cited
CA789465A
Cited
US1919842A
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GB384532A
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GB561679A
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GB563350A
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US3084023A
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GB953216A
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |