US4371727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel oils from coal
Assignee: Coal Industry Patents Ltd
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Filing: 1980-10-07
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Granted: 1983-02-01
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Expires: 2000-10-07
Abstract
Abstract Fuel oils especially suitable as gas oils for fuelling high speed Diesel engines, are made by hydrogenating a middle oil derived from coal and containing at least 90% of polycyclic hydrocarbons and essentially no paraffinic material, and fractionating the hydrogenated oil to yield the gas oil. The product oil is fully competitive with gas oils from petroleum, and may be blended with petroleum gas oil.
Inventors
- 👤 Derek G. Gavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:49
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G2400/00; C10G2400/04; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A process for the production of Diesel fuel suitable for high speed engines, comprising hydrogenating over a hydrogenation catalyst at a temperature of 350° to 450° C. and a hydrogen pressure of 50 to 750 bars a fraction of a hydrocracked coal extract boiling in the range of 170° to 350° C., which fraction contains at least 90% of polycyclic hydrocarbons, contains a major proportion of naphthenes and does not contain any significant amount of mineral matter or paraffinic material, and fractionating the product hydrogenated oil using cut points within the range of 170° to 350° C. to yield a gas oil.
Claim 2
Dependent Claim
102 words
A process for the production of Diesel fuel suitable for high speed engines, comprising hydrogenating over a hydrogenation catalyst at a temperature of 350° to 450° C. and a hydrogen pressure of 50 to 750 bars a fraction of a hydrocracked coal extract boiling in the range of 170° to 350° C., which fraction contains at least 90% of polycyclic hydrocarbons, contains a major proportion of naphthenes and does not contain any significant amount of mineral matter or paraffinic material, and fractionating the product hydrogenated oil using cut points within the range of 170° to 350° C. to yield a gas oil.
Claim 3
Dependent Claim
19 words
A process as claimed in claim 1, wherein the hydrogen concentration is in the range of 40 to 97%.
Claim 4
Dependent Claim
10 words
The gas oil produced by the process of claim 1.
Claim 5
Dependent Claim
15 words
The gas oil as claimed in claim 3 when blended with a petroleum gas oil.
Claim 6
Independent Claim
138 words
A method of fuelling a high speed Diesel engine, comprising supplying to a combustion chamber of a high speed compression ignition engine a gas oil manufactured by hydrogenating over a hydrogenation catalyst at a temperature of 350° to 450° C. and a hydrogen pressure of 50 to 750 bars, a fraction of a hydrocracked coal extract boiling in the range of 170° to 350° C., which fraction contains at least 90% of polycyclic hydrocarbons, contains a major proportion of naphthenes and does not contain any significant amount of mineral matter or paraffinic material, and fractionating the product hydrogenated oil using cut points within the range of 170° to 350° C. to yield a gas oil; supplying air to said combustion chamber in an effective amount relative to the gas oil; and operating the engine in a Diesel cycle.
Claim 7
Independent Claim
138 words
A method of fuelling a high speed Diesel engine, comprising supplying to a combustion chamber of a high speed compression ignition engine a gas oil manufactured by hydrogenating over a hydrogenation catalyst at a temperature of 350° to 450° C. and a hydrogen pressure of 50 to 750 bars, a fraction of a hydrocracked coal extract boiling in the range of 170° to 350° C., which fraction contains at least 90% of polycyclic hydrocarbons, contains a major proportion of naphthenes and does not contain any significant amount of mineral matter or paraffinic material, and fractionating the product hydrogenated oil using cut points within the range of 170° to 350° C. to yield a gas oil; supplying air to said combustion chamber in an effective amount relative to the gas oil; and operating the engine in a Diesel cycle.
References Cited (Backward Citations)
GB372783A
Cited
GB484127A
Cited
GB493470A
Cited
US2180206A
Cited
GB730030A
Cited
US3755137A
Cited
GB1452610A
Cited
GB1550909A
Cited
GB1546808A
Cited
US4094766A
Cited
GB2014186B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |