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Patent US4574038A successfully refreshed from Google Patents.
US4574038A
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US
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Microwave induced catalytic conversion of methane to ethylene and hydrogen
Assignee: Alberta Oil Sands Technology and Research Authority
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Filing: 1985-08-01
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Granted: 1986-03-04
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Expires: 2005-08-01
Abstract
Abstract A process for selectively converting methane to ethylene and hydrogen is provided. Methane is brought into contact with a metal powder catalyst and subjected to a pulse train of microwave radiation for a sufficient period of time to effect conversion thereof. The reaction products are recovered.
Inventors
- 👤 Jeffrey K. S. Wan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:52
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/26; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126; C07; C07C; C07C2/00; C07C2/76; C01B2203/00; C01B2203/08; C01B2203/0805; C01B2203/0855; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1058; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/75; C07C2523/755
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A process for converting methane to ethylene and hydrogen comprising: providing methane in a reaction zone containing a catalyst, said catalyst being capable of absorbing microwave radiation; irradiating the methane in the presence of said catalyst with pulsed microwave radiation for a sufficient period of time, to thereby convert methane to ethylene and hydrogen; and recovering said reaction products.
Claim 2
Dependent Claim
59 words
A process for converting methane to ethylene and hydrogen comprising: providing methane in a reaction zone containing a catalyst, said catalyst being capable of absorbing microwave radiation; irradiating the methane in the presence of said catalyst with pulsed microwave radiation for a sufficient period of time, to thereby convert methane to ethylene and hydrogen; and recovering said reaction products.
Claim 3
Dependent Claim
22 words
A process as set forth in claim 1 wherein: the catalyst is a metal powder comprising Ni, Co, Fe, and mixtures thereof.
Claim 4
Dependent Claim
79 words
A process for converting methane to ethylene and hydrogen comprising: providing a metal powder catalyst, comprising Ni, Co, Fe, and mixtures thereof, in a reaction zone; activating the catalyst by removing surface oxides therefrom; introducing methane into the reaction zone; irradiating the methane in the presence of the catalyst with pulsed microwave radiation, the duration and number of said pulses being controlled to convert the greatest part of the methane to ethylene and hydrogen; and recovering said reaction products.
Claim 5
Dependent Claim
79 words
A process for converting methane to ethylene and hydrogen comprising: providing a metal powder catalyst, comprising Ni, Co, Fe, and mixtures thereof, in a reaction zone; activating the catalyst by removing surface oxides therefrom; introducing methane into the reaction zone; irradiating the methane in the presence of the catalyst with pulsed microwave radiation, the duration and number of said pulses being controlled to convert the greatest part of the methane to ethylene and hydrogen; and recovering said reaction products.
Claim 6
Dependent Claim
25 words
The process as set forth in claim 3 wherein: the microwave radiation wavelength is in the range of about 1.5 to 3 GH z .
Claim 7
Dependent Claim
43 words
The process as set forth in claim 4 wherein: the microwave radiation is supplied in pulses of about 0.5 to 10 seconds with off times of about 20 to 60 seconds, the cumulative duration of the pulses being about 20 to 60 seconds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |