US4326945A
Expired / Lapsed
US
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Coal liquefaction process
Assignee: Honeywell UOP LLC
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Filing: 1980-10-08
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Granted: 1982-04-27
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Expires: 2000-10-08
Abstract
Abstract A process for liquefying coal by subjecting bituminous coal particles to electromagnetic wave energy and having wavelengths of from about 0.001 to about 100 A and recovering valuable liquid hydrocarbon products from the resulting liquid coal extract.
Inventors
- 👤 John F. Flagg
- 👤 Russell W. Johnson
- 👤 John G. Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
C; C10; C10G; C10G1/00; Y; Y10; Y10S; Y10S208/00; Y10S208/951
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
A process for the liquefaction of coal which comprises: (a) subjecting coal particles to electromagnetic wave energy artificially externally supplied and having wavelengths of from about 0.001 to about 100 A; and (b) subjecting the resulting coal particles to coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 2
Dependent Claim
80 words
A process for the liquefaction of coal which comprises: (a) subjecting coal particles to electromagnetic wave energy artificially externally supplied and having wavelengths of from about 0.001 to about 100 A; and (b) subjecting the resulting coal particles to coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said conditions include the presence of added hydrogen gas.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said conditions include the presence of an added admixture of hydrogen and hydrogen sulfide gas.
Claim 5
Dependent Claim
29 words
The process according to claim 1 wherein said coal comprises high volatile content bituminous coal having a volatile content greater than about 20% by weight of the M.A.F. coal.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein said conditions include the presence of a selective solvent.
Claim 7
Dependent Claim
54 words
The process of claim 5 wherein said conditions include the presence of from about 500 to about 10,000 standard cubic feet of added hydrogen per barrel of solvent, a selective solvent to coal ratio of from about 0.2 to about 10 and a residence time of from about 30 seconds to about 5 hours.
Claim 8
Dependent Claim
87 words
A process for the liquefaction of coal which comprises: (a) subjecting coal particles in the presence of a selective solvent to electromagnetic wave energy artificially externally supplied and having wavelengths of from about 0.001 to about 100 A; and (b) subjecting the resulting coal particles to coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 9
Dependent Claim
87 words
A process for the liquefaction of coal which comprises: (a) subjecting coal particles in the presence of a selective solvent to electromagnetic wave energy artificially externally supplied and having wavelengths of from about 0.001 to about 100 A; and (b) subjecting the resulting coal particles to coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 10
Dependent Claim
15 words
The process of claim 7 wherein said conditions include the presence of added hydrogen gas.
Claim 11
Dependent Claim
21 words
The process of claim 7 wherein said conditions include the presence of an added admixture of hydrogen and hydrogen sulfide gas.
Claim 12
Dependent Claim
29 words
The process according to claim 7 wherein said coal comprises high volatile content bituminous coal having a volatile content greater than about 20% by weight of the M.A.F. coal.
Claim 13
Dependent Claim
54 words
The process of claim 7 wherein said conditions include the presence of from about 500 to about 10,000 standard cubic feet of added hydrogen per barrel of solvent, a selective solvent to coal ratio of from about 0.2 to about 10 and a residence time of from about 30 seconds to about 5 hours.
Claim 14
Dependent Claim
78 words
A process for the liquefaction of coal which comprises subjecting coal particles in the presence of a selective solvent to electromagnetic wave energy artificially externally supplied having wavelengths of from about 0.001 to about 100 A at coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 15
Dependent Claim
78 words
A process for the liquefaction of coal which comprises subjecting coal particles in the presence of a selective solvent to electromagnetic wave energy artificially externally supplied having wavelengths of from about 0.001 to about 100 A at coal liquefaction conditions including a temperature from about 32° F. to about 900° F. and a pressure from one atmosphere to about 10,000 psig sufficient to convert at least about 50% by weight of the M.A.F. coal into normally liquid products.
Claim 16
Dependent Claim
15 words
The process of claim 12 wherein said conditions include the presence of added hydrogen gas.
Claim 17
Dependent Claim
21 words
The process of claim 12 wherein said conditions include the presence of an added admixture of hydrogen and hydrogen sulfide gas.
Claim 18
Dependent Claim
28 words
The process of claim 12 wherein said coal comprises high volatile content bituminous coal having a volatile content greater than about 20% by weight of the M.A.F. coal.
Claim 19
Dependent Claim
54 words
The process of claim 12 wherein said conditions include the presence of from about 500 to about 10,000 standard cubic feet of added hydrogen per barrel of solvent, a selective solvent to coal ratio of from about 0.2 to about 10 and a residence time of from about 30 seconds to about 5 hours.
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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |