US4066704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic oxidation
Assignee: POWER-GAS Corp Ltd
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Filing: 1970-12-28
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Granted: 1978-01-03
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Expires: 1990-12-28
Abstract
Abstract Alkanes are catalytically oxidized in the absence of ammonia by passing a feed gas including the alkane and oxygen at an elevated temperature over a solid catalyst. The partial pressure of the alkane in the feed gas exceeds 0.70 atmospheres absolute. Examples of the catalytic oxidation are the production of acrolein and methacrolein and acrylic acid and methacrylic acid from propane and iso-butane.
Inventors
- 👤 Norman Harris
- 👤 David Naden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; B; B01; B01J; B01J23/00; B01J23/12; B01J23/14; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/30; B01J23/70; B01J23/76; B01J23/84; B01J37/00; B01J37/02; B01J37/0201; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C5/00; C07C5/42; C07C5/48; C07C51/00; C07C51/16; C07C51/21; C07C51/215; F16L17/00; F16L17/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A process for the catalytic oxidation or oxidative dehydrogenation of an alkane of 3 to 8 carbon atoms to an aldehyde, in which a feed gas comprising oxygen and the alkane in vapor phase is passed in the absence of ammonia and at a temperature in the range of 350° to 569° C. over a solid oxidation catalyst comprising one of the elements Sb, Mo, W, V and Bi; at least one other of those elements and/or at least one of the elements Fe, Sn, U, Ti, Pb, Co, Cu and P; and oxygen, and in which the partial pressure of the alkane in the feed gas is in excess of 0.70 atmosphere absolute and the alkane constitutes more than 70% of the feed gas by volume.
Claim 2
Dependent Claim
127 words
A process for the catalytic oxidation or oxidative dehydrogenation of an alkane of 3 to 8 carbon atoms to an aldehyde, in which a feed gas comprising oxygen and the alkane in vapor phase is passed in the absence of ammonia and at a temperature in the range of 350° to 569° C. over a solid oxidation catalyst comprising one of the elements Sb, Mo, W, V and Bi; at least one other of those elements and/or at least one of the elements Fe, Sn, U, Ti, Pb, Co, Cu and P; and oxygen, and in which the partial pressure of the alkane in the feed gas is in excess of 0.70 atmosphere absolute and the alkane constitutes more than 70% of the feed gas by volume.
Claim 3
Dependent Claim
24 words
A process according to claim 1 in which the alkane and oxygen constitute approximately 80% and 20% respectively of the feed gas by volume.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |