US4394248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction process
Assignee: Honeywell UOP LLC
•
Filing: 1981-09-18
•
Granted: 1983-07-19
•
Expires: 2001-09-18
Abstract
Abstract A process for liquefying coal which comprises contacting coal and solvent in the presence of a residual oil containing asphaltenes and at least one finely divided, unsupported metal sulfide and recovering valuable liquid hydrocarbon products from the resulting liquid coal extract.
Inventors
- 👤 John G. Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:45
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/083
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
49 words
A process for producing hydrogen-enriched hydrocarbonaceous products from coal which comprises: (a) contacting said coal in a solvent extraction zone at solvent extraction conditions with a solvent, hydrogen and a residual oil containing asphaltenes and at least one finely divided, unsupported metal sulfide; and (b) recovering hydrogen-enriched hydrocarbonaceous products.
Claim 2
Dependent Claim
49 words
A process for producing hydrogen-enriched hydrocarbonaceous products from coal which comprises: (a) contacting said coal in a solvent extraction zone at solvent extraction conditions with a solvent, hydrogen and a residual oil containing asphaltenes and at least one finely divided, unsupported metal sulfide; and (b) recovering hydrogen-enriched hydrocarbonaceous products.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said residual oil is atmospheric crude tower bottoms.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said residual oil is vacuum tower bottoms.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said residual oil is a catalyst sludge.
Claim 6
Dependent Claim
23 words
The process of claim 4 wherein said catalyst sludge is obtained from a slurry catalyst process which hydrotreats a high metals content hydrocarbon.
Claim 7
Dependent Claim
54 words
The process of claim 1 wherein said solvent extraction conditions include a temperature from about 400° F. to about 900° F., a pressure from about 500 to about 5,000 psig, a solvent to coal weight ratio from about 0.1 to about 10 and a residence time from about 30 seconds to about 10 hours.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the residual oil to coal weight ratio is from about 0.01 to about 10.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein said residual oil contains from about 0.01 to about 20 weight percent metal based on the elemental metal.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein said residual oil contains from about 2.0 to about 10 weight percent metal based on the elemental metal.
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein said metal is a Group V-B metal.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein said metal is a Group VI-B metal.
Claim 13
Dependent Claim
13 words
The process of claim 1 wherein said metal is a Group VIII metal.
Claim 14
Dependent Claim
12 words
The process of claim 1 wherein said Group V-B metal is vanadium.
Claim 15
Dependent Claim
12 words
The process of claim 1 wherein said Group VI-B metal is molybdenum.
Claim 16
Dependent Claim
12 words
The process of claim 1 wherein said Group VIII metal is nickel.
Claim 17
Dependent Claim
15 words
The process of claim 1 wherein said solvent comprises hydrocarbons previously derived from coal liquefaction.
Claim 18
Dependent Claim
11 words
The process of claim 1 wherein said solvent comprises naphthalenic hydrocarbons.
Claim 19
Dependent Claim
24 words
The process of claim 1 wherein the finely divided, unsupported metal sulfide has a nominal diameter from about one micron to about 2000 microns.
Claim 20
Dependent Claim
26 words
The process of claim 1 wherein said solvent comprises a hydrogenated coal oil which has been hydrogenated to convert at least about 80% of the asphaltenes.
Claim 21
Dependent Claim
32 words
The process of claim 1 wherein said hydrogen is admixed with hydrogen sulfide in an amount to provide a hydrogen to hydrogen sulfide molar ratio of from about 2 to about 200.
Claim 22
Dependent Claim
32 words
The process of claim 1 wherein said hydrogen is admixed with hydrogen sulfide in an amount to provide a hydrogen to hydrogen sulfide molar ratio of from about 4 to about 100.
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |