US4547201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
SRC Residual fuel oils
Assignee: International Coal Refining Co
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Filing: 1983-12-14
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Granted: 1985-10-15
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Expires: 2003-12-14
Abstract
Abstract Coal solids (SRC) and distillate oils are combined to afford single-phase blends of residual oils which have utility as fuel oils substitutes. The components are combined on the basis of their respective polarities, that is, on the basis of their heteroatom content, to assure complete solubilization of SRC. The resulting composition is a fuel oil blend which retains its stability and homogeneity over the long term.
Inventors
- 👤 Krishna C. Tewari
- 👤 Edward P. Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:57
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
A homogeneous, single phase blend of fuel oil having long term viscosity stability consisting essentially of a blend of: (1) deashed solvent refined coal selected from the group consisting of a first-stage deashed 850° F. + coal (SRC), a first-stage critical solvent deashed 850° F. + coal (HSRC) and a two-stage liquefaction deashed 850° F. + coal (TSL SRC) with (2) a distillate oil selected from the group consisting of a first-stage 400°-650° F. middle distillate oil, a first-stage 650°-850° F. heavy distillate oil, a first-stage 450°-850° F. coal liquefaction derived solvent, a second stage 400°-650° F. middle distillate oil, a second-stage 650°-850° F. heavy distillate oil, a second stage 450°-850° F. coal liquefaction process solvent and combinations thereof, wherein said selected solvent refined coal is present in said blend in a quantity of from 40 to 50 weight % based on the the weight of said blend and wherein said selected distillate oil or mixture thereof contains a heteroatom content of at least about 1/4 of the heteroatom content of said selected solvent refined coal.
Claim 2
Dependent Claim
176 words
A homogeneous, single phase blend of fuel oil having long term viscosity stability consisting essentially of a blend of: (1) deashed solvent refined coal selected from the group consisting of a first-stage deashed 850° F. + coal (SRC), a first-stage critical solvent deashed 850° F. + coal (HSRC) and a two-stage liquefaction deashed 850° F. + coal (TSL SRC) with (2) a distillate oil selected from the group consisting of a first-stage 400°-650° F. middle distillate oil, a first-stage 650°-850° F. heavy distillate oil, a first-stage 450°-850° F. coal liquefaction derived solvent, a second stage 400°-650° F. middle distillate oil, a second-stage 650°-850° F. heavy distillate oil, a second stage 450°-850° F. coal liquefaction process solvent and combinations thereof, wherein said selected solvent refined coal is present in said blend in a quantity of from 40 to 50 weight % based on the the weight of said blend and wherein said selected distillate oil or mixture thereof contains a heteroatom content of at least about 1/4 of the heteroatom content of said selected solvent refined coal.
Claim 3
Dependent Claim
21 words
The fuel oil of claim 1 wherein said solvent-refined coal is blended with said distillate oils in pulverized or molten form.
Claim 4
Dependent Claim
27 words
A fuel oil according to claim 1 wherein first-stage deashed 850° F.+ coal (SRC) is blended with a mixture of first-stage distillate oil and second-stage distillage oil.
Claim 5
Dependent Claim
20 words
A fuel oil according to claim 1 wherein first-stage deashed 850° F.+ coal (SRC) is blended with first-stage distillate oil.
Claim 6
Dependent Claim
31 words
A fuel oil according to claim 1 consisting essentially of first-stage deashed coal (SRC), second-stage heavy oil and first-stage heavy oil in an amount equal to or greater than 10 wt%.
Claim 7
Dependent Claim
30 words
A fuel oil according to claim 1 consisting essentially of first-stage deashed 850° F.+ coal (SRC), second-stage middle oil and first-stage heavy oil in an amount greater than 15 wt%.
Claim 8
Dependent Claim
32 words
A fuel oil according to claim 1 consistng essentially of first-stage deashed 850° F. coal (SRC), second-stage process solvent and first-stage process solvent in an amount at least equal to 20 wt%.
Claim 9
Independent Claim
170 words
A method for preparing a homogeneous, single-phase blend of fuel oil which comprises blending two components, (1) a deashed solvent refined coal selected from the group consisting of a first-stage deashed 850° F. + coal, a first-stage critical solvent deashed 850° F. + coal and a two-stage liquefaction deashed 850° F. + coal with (2) a distillate oil selected from the group consisting of a first-stage 400°-650° F. middle distillate oil, a first-stage 650°-850° F. heavy distillate oil, a first-stage 450°-850° F. coal liquefaction process solvent, a second-stage 400°-650° F. middle distillate oil, a second-stage 650°-850° F. heavy distillate oil, a second-stage 450°-850° F. coal liquefaction process solvent and combinations thereof, to the extent that the selected solvent refined coal is present in said blend in quantity of from 40 to 50 weight % based on the weight of said blend and wherein said selected distillate oil or mixture thereof contains a heteroatom content of at least about one quarter of the heteroatom content of said selected solvent refined coal.
Claim 10
Independent Claim
170 words
A method for preparing a homogeneous, single-phase blend of fuel oil which comprises blending two components, (1) a deashed solvent refined coal selected from the group consisting of a first-stage deashed 850° F. + coal, a first-stage critical solvent deashed 850° F. + coal and a two-stage liquefaction deashed 850° F. + coal with (2) a distillate oil selected from the group consisting of a first-stage 400°-650° F. middle distillate oil, a first-stage 650°-850° F. heavy distillate oil, a first-stage 450°-850° F. coal liquefaction process solvent, a second-stage 400°-650° F. middle distillate oil, a second-stage 650°-850° F. heavy distillate oil, a second-stage 450°-850° F. coal liquefaction process solvent and combinations thereof, to the extent that the selected solvent refined coal is present in said blend in quantity of from 40 to 50 weight % based on the weight of said blend and wherein said selected distillate oil or mixture thereof contains a heteroatom content of at least about one quarter of the heteroatom content of said selected solvent refined coal.
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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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |