US4309192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of water-containing coal
Assignee: SANKO GAS CHEMICAL Co Ltd
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Filing: 1980-06-27
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Granted: 1982-01-05
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Expires: 2000-06-27
Abstract
Abstract Disclosed is a process for the treatment of water-containing coal which comprises mixing the water-containing coal with a hydrocarbon oil having a specific gravity higher than that of water at temperatures in the range of 100° to 350° C.; heating the resulting mixture at a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature; and then allowing the heated mixture to settle at a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature, whereby an upper layer consisting of the water separated from the water-containing coal is formed on a lower layer consisting of the mixture of the dehydrated coal and the hydrocarbon oil.
Inventors
- 👤 Isao Kubo
- 👤 Shigemi Nagayoshi
- 👤 Futao Sakata
- 👤 Tetsuo Wada
- 👤 Shoichi Oi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:31
CPC Classifications
C; C10; C10L; C10L9/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
152 words
A process for the treatment of water-containing coal which comprises: (a) in a mixing zone, mixing the water-containing coal with a hydrocarbon oil having a specific gravity higher than that of water at temperatures in the range of 100° to 350° C.; (b) heating the resulting mixture to a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature; and (c) introducing the heated mixture into a gravity separation zone at a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature, whereby the water separated from the water-containing coal is withdrawn from an upper section of the gravity separation zone and the mixture consisting of the dehydrated coal and the hydrocarbon oil is withdrawn from a lower section of the gravity separation zone.
Claim 2
Dependent Claim
152 words
A process for the treatment of water-containing coal which comprises: (a) in a mixing zone, mixing the water-containing coal with a hydrocarbon oil having a specific gravity higher than that of water at temperatures in the range of 100° to 350° C.; (b) heating the resulting mixture to a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature; and (c) introducing the heated mixture into a gravity separation zone at a temperature in the range of 100° to 350° C. and a pressure not lower than the saturated vapor pressure of water at that temperature, whereby the water separated from the water-containing coal is withdrawn from an upper section of the gravity separation zone and the mixture consisting of the dehydrated coal and the hydrocarbon oil is withdrawn from a lower section of the gravity separation zone.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the hydrocarbon oil is a hydrocarbon oil obtained from coal.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 wherein the hydrocarbon oil is a hydrocarbon oil obtained from petroleum.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 wherein the hydrocarbon oil is a circulating solvent for use in the liquefaction of coal.
Claim 6
Dependent Claim
24 words
A process as claimed in claim 1 wherein the temperature of the gravity separation zone is in the range of 100° to 300° C.
Claim 7
Dependent Claim
46 words
A process as claimed in claim 1 wherein the water-containing coal is an oleophilic coal having a rank of coalification equal to or higher than that of sub-bituminous coal, and the temperature of the gravity separation zone is in the range of 100° to 220° C.
Claim 8
Dependent Claim
45 words
A process as claimed in claim 1 wherein the water-containing coal is a coal having a rank of coalification equal to or lower than that of brown coal and the temperature of the gravity separation zone is in the range of 200° to 300° C.
Claim 9
Dependent Claim
37 words
A process as claimed in claim 1 wherein the water-containing coal is a solid organic material composed largely of carbon, and the temperature of the gravity separation zone is in the range of 200° to 300° C.
Claim 10
Dependent Claim
41 words
A process as claimed in claim 1 wherein the residual water present in the mixture consisting of the dehydrated coal and the hydrocarbon oil is evaporated by exposing the mixture to a pressure lower than that of the gravity separation zone.
Claim 11
Dependent Claim
43 words
A process as claimed in claim 1 wherein the concentration of the dehydrated coal in the mixture consisting of the dehydrated coal and the hydrocarbon oil is increased by removing the residual water and a part of the hydrocarbon oil from the mixture.
Claim 12
Dependent Claim
35 words
A process as claimed in claim 9 wherein the concentration of the dehydrated coal in the mixture freed of the residual water is increased by removing a part of the hydrocarbon oil from the mixture.
Claim 13
Dependent Claim
26 words
A process as claimed in claim 10 wherein the removed hydrocarbon oil is utilized as a part of the hydrocarbon oil used in the mixing zone.
Claim 14
Dependent Claim
26 words
A process as claimed in claim 11 wherein the removed hydrocarbon oil is utilized as a part of the hydrocarbon oil used in the mixing zone.
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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |