US4087259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for partially oxidizing hydrocarbons
Assignee: Toyota Central R&D Labs Inc
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Filing: 1976-05-25
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Granted: 1978-05-02
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Expires: 1996-05-25
Abstract
Abstract A catalyst and a process for partially oxidizing hydrocarbons to hydrogen and carbon monoxide is provided. The catalyst consists essentially of rhodium, the rhodium being usually supported on a carrier. In the process, a mixture gas of a hydrocarbon such as naptha, gasoline and propane and an oxidizer such as air and/or oxygen is contacted with the rhodium catalyst at an elevated temperature.
Inventors
- 👤 Yoshiyasu Fujitani
- 👤 Hideaki Muraki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:04
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/386; C01B3/40; C01B2203/00; C01B2203/02; C01B2203/025; C01B2203/0261; C01B2203/10; C01B2203/1005; C01B2203/1011; C01B2203/1017; C01B2203/1023; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1064; C01B2203/1082; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1247
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A process for partially oxidizing a hydrocarbon to hydrogen and carbon monoxide comprising: mixing a gas mixture of a hydrocarbon selected from the group consisting of naphtha, heavy oil, fuel oil, light oil, kerosene, gasoline and propane and an oxidizer selected from the group consisting of air, oxygen, a mixture of air and oxygen, a mixture of air and steam and a mixture of oxygen and steam, wherein the amount of said oxidizer employed based upon free oxygen as the oxidizing agent relative to said hydrocarbon is equivalent to the amount of air used in an excess air ratio ranging from 0.34 to 0.51 when air is used as said oxidizer; and reacting said gas mixture in the presence of a catalyst consisting essentially of from 0.005 wt.% to 1.0 wt.% rhodium supported on a carrier at 690° C to 900° C at a liquid hourly space velocity ranging from 0.5 to 25 liters per hour.
Claim 2
Dependent Claim
156 words
A process for partially oxidizing a hydrocarbon to hydrogen and carbon monoxide comprising: mixing a gas mixture of a hydrocarbon selected from the group consisting of naphtha, heavy oil, fuel oil, light oil, kerosene, gasoline and propane and an oxidizer selected from the group consisting of air, oxygen, a mixture of air and oxygen, a mixture of air and steam and a mixture of oxygen and steam, wherein the amount of said oxidizer employed based upon free oxygen as the oxidizing agent relative to said hydrocarbon is equivalent to the amount of air used in an excess air ratio ranging from 0.34 to 0.51 when air is used as said oxidizer; and reacting said gas mixture in the presence of a catalyst consisting essentially of from 0.005 wt.% to 1.0 wt.% rhodium supported on a carrier at 690° C to 900° C at a liquid hourly space velocity ranging from 0.5 to 25 liters per hour.
Claim 3
Dependent Claim
49 words
The process of claim 1, wherein said oxidizer is air and the mixing ratio of air to the hydrocarbon is such that the ratio of the amount of air employed to the equivalent amount required for complete combustion of the hydrocarbon is in the range of 0.34 to 0.51.
Claim 4
Dependent Claim
47 words
The process of claim 1, wherein said oxidizer is a mixture of air and steam or a mixture of oxygen and steam and the mixing ratio of steam to the liquid hydrocarbon is not more than 0.5 by volume in terms of the equivalent amount of water.
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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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |