Patent US4277365A successfully refreshed from Google Patents.
US4277365A
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Production of reducing gas
Assignee: Texaco Development Corp
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Filing: 1979-12-17
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Granted: 1981-07-07
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Expires: 1999-12-17
Abstract
Abstract A reducing gas having a high H 2 +CO content and a low H 2 O+CO 2 content is prepared by gasifying a feed mixture comprising low grade hydrocarbon oil and a high ash solid fuel and a fluxing agent.
Inventors
- 👤 Peter L. Paull
- 👤 Edward T. Child
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:36
CPC Classifications
C; C10; C10J; C10J3/00; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C10J3/46; C10J3/48; C10J3/50; C10J3/506; C10J3/72; C10J3/78; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/0983; C10J2300/0996
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
A process for the production of a reducing gas which comprises subjecting a carbonaceous feed consisting essentially of a mixture of a low grade hydrocarbon oil and 30-70 weight percent of a high ash solid fuel containing at least 30 weight percent ash in the presence of H 2 O in an amount not greater than 0.19 pound per pound of gasifiable material in the feed to partial oxidation with an oxygen containing gas in the presence of a fluxing agent added in an amount between about 1 and 10 weight percent based on the feed at a temperature between about 2000° and 2800° F. using an O:C atomic ratio of less than 1.2 to produce a reducing gas having a reducing ratio of at least 10 and having a free carbon content of less than 2.0 percent based on the carbon content of the feed.
Claim 2
Dependent Claim
146 words
A process for the production of a reducing gas which comprises subjecting a carbonaceous feed consisting essentially of a mixture of a low grade hydrocarbon oil and 30-70 weight percent of a high ash solid fuel containing at least 30 weight percent ash in the presence of H 2 O in an amount not greater than 0.19 pound per pound of gasifiable material in the feed to partial oxidation with an oxygen containing gas in the presence of a fluxing agent added in an amount between about 1 and 10 weight percent based on the feed at a temperature between about 2000° and 2800° F. using an O:C atomic ratio of less than 1.2 to produce a reducing gas having a reducing ratio of at least 10 and having a free carbon content of less than 2.0 percent based on the carbon content of the feed.
Claim 3
Dependent Claim
19 words
The process of claim 1 in which the oxygen-containing gas is oxygen having a purity of at least 95%.
Claim 4
Dependent Claim
16 words
The process of claim 1 in which the O:C atomic ratio is between 0.95 and 1.1.
Claim 5
Dependent Claim
25 words
The process of claim 1 in which the fluxing agent is selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates.
Claim 6
Dependent Claim
14 words
The process of claim 4 in which the alkali metal carbonate is sodium carbonate.
Claim 7
Dependent Claim
15 words
The process of claim 4 in which the alkaline earth metal carbonate is calcium carbonate.
Claim 8
Dependent Claim
21 words
The process of claim 1 in which the feed mixture is preheated to a temperature not greater than about 700° F.
Claim 9
Dependent Claim
28 words
The process of claim 1 in which H 2 O is present in an amount not greater than 0.15 pound per pound of gasifiable material in the feed.
References Cited (Backward Citations)
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US3694373A
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |