US4265637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing blending fuel
Assignee: ConocoPhillips Co
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Filing: 1980-01-16
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Granted: 1981-05-05
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Expires: 2000-01-16
Abstract
Abstract A process for preparing a blended fuel from lignite and fuel oil type hydrocarbons. The process involves drying lignite to a low moisture level, applying a treating liquid to the dried lignite, storing the treated lignite, and subsequently blending treated lignite with liquid hydrocarbon such as fuel oil.
Inventors
- 👤 Ardis L. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:34
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322; C10L1/10; C10L1/12; C10L1/1208; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A process of preparing a blended fuel comprising: (a) subjecting lignite containing its natural bed moisture to a drying step in which the moisture content of the lignite is reduced to from 10 to 20 percent by weight water; (b) applying a hydrocarbon liquid having a flash point of greater than 65° C. to the dried lignite in an amount of from 2 to 20 liters of liquid per metric ton of dried lignite, wherein said hydrocarbon liquid is comprised of 50 to 75 volume percent decant oil from a fluidized bed catalytic cracking operation having a K factor of not more than 10.5 and 50 to 25 volume percent asphalt; (c) storing the liquid treated lignite from step (b); and (d) removing stored lignite and blending it with sufficient hydrocarbon fuel oil to provide a pumpable mixture.
Claim 2
Dependent Claim
138 words
A process of preparing a blended fuel comprising: (a) subjecting lignite containing its natural bed moisture to a drying step in which the moisture content of the lignite is reduced to from 10 to 20 percent by weight water; (b) applying a hydrocarbon liquid having a flash point of greater than 65° C. to the dried lignite in an amount of from 2 to 20 liters of liquid per metric ton of dried lignite, wherein said hydrocarbon liquid is comprised of 50 to 75 volume percent decant oil from a fluidized bed catalytic cracking operation having a K factor of not more than 10.5 and 50 to 25 volume percent asphalt; (c) storing the liquid treated lignite from step (b); and (d) removing stored lignite and blending it with sufficient hydrocarbon fuel oil to provide a pumpable mixture.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the lignite is dried to between 10 and 15 percent by weight water.
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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |