US4212852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of deodorizing gas containing hydrogen sulfide and ammonia and/or amines
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1978-05-05
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Granted: 1980-07-15
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Expires: 1998-05-05
Abstract
Abstract Malodorous gas containing (1) ammonia and/or amines and (2) hydrogen sulfide is deodorized by reacting the gas with oxygen in the presence of activated carbon having supported thereon at least a metal compound selected from the group consisting of vanadium compounds, molybdenum compounds and tungsten compounds.
Inventors
- 👤 Toshio Aibe
- 👤 Kiyoshi Itoga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:08
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/34; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
65 words
A method for deodorizing malodorous gas which comprises reacting a malodorous gas containing (1) ammonia and/or amines and (2) hydrogen sulfide, wherein the hydrogen sulfide is in stoichiometric excess with respect to the ammonia and/or amines, with oxygen in the presence of activated carbon having supported thereon at least a metal compound selected from the group consisting of vanadium compounds, molybdenum compounds and tungsten compounds.
Claim 2
Independent Claim
65 words
A method for deodorizing malodorous gas which comprises reacting a malodorous gas containing (1) ammonia and/or amines and (2) hydrogen sulfide, wherein the hydrogen sulfide is in stoichiometric excess with respect to the ammonia and/or amines, with oxygen in the presence of activated carbon having supported thereon at least a metal compound selected from the group consisting of vanadium compounds, molybdenum compounds and tungsten compounds.
Claim 3
Dependent Claim
38 words
A method as claimed in claim 1, wherein the malodorous gas further contains sulfur dioxide, the total amount of sulfur dioxide and hydrogen sulfide being in stoichiometric excess with respect to the total content of ammonia and/or amines.
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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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |