Patent US4595067A successfully refreshed from Google Patents.
Patent US4133740A successfully refreshed from Google Patents.
US4133740A
Expired / Lapsed
US
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Process for increasing the fuel yield of coal liquefaction products by extraction of asphaltenes, resins and aromatic compounds from said coal liquefaction products
Assignee: Gulf Research and Development Co
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Filing: 1977-10-21
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Granted: 1979-01-09
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Expires: 1997-10-21
Abstract
Abstract A process for increasing the fuel yield of coal liquefaction products by extracting the asphaltenes, resins and aromatic compounds from said coal liquefaction products. This is accomplished by contacting said coal liquefaction products with a halogenated aliphatic solvent to form two phases, one containing tar and the other containing said solvent and the remainder of said coal liquefaction products, separating said phases from each other and treating said tar phase with a second solvent to recover asphaltenes, resins and/or aromatics in said tar phase. The resulting asphaltenes, resins and/or aromatics are suitable for upgrading to produce additional synthetic fuel.
Inventors
- 👤 John A. Paraskos
- 👤 Edward W. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:42
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/006; C10G1/045; C10G1/08; C10G1/083; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
160 words
A process for increasing the yield of a liquid synthetic fuel in a coal liquefication process which comprises forming a mixture by blending a coal slurry liquefaction product with a halogenated aliphatic solvent of the formula: ##STR3## wherein n is an integer of from about 1 to about 20; and wherein A, B, D and E are either alike or different, members selected from the group consisting of hydrogen, chlorine, bromine or fluorine and mixtures thereof, with the provision that at least one of said A, B, D or E is chlorine, bromine or fluorine; allowing the mixture to separate into an upper phase containing tar and a lower phase containing said solvent and the remainder of said coal liquefaction product; separating said phases from each other and treating said tar phase with a second solvent selected from the group consisting of benzene, n-hexane, cyclohexane or toluene and mixtures thereof, to recover asphaltenes, resins and/or aromatics in said tar phase.
Claim 2
Dependent Claim
160 words
A process for increasing the yield of a liquid synthetic fuel in a coal liquefication process which comprises forming a mixture by blending a coal slurry liquefaction product with a halogenated aliphatic solvent of the formula: ##STR3## wherein n is an integer of from about 1 to about 20; and wherein A, B, D and E are either alike or different, members selected from the group consisting of hydrogen, chlorine, bromine or fluorine and mixtures thereof, with the provision that at least one of said A, B, D or E is chlorine, bromine or fluorine; allowing the mixture to separate into an upper phase containing tar and a lower phase containing said solvent and the remainder of said coal liquefaction product; separating said phases from each other and treating said tar phase with a second solvent selected from the group consisting of benzene, n-hexane, cyclohexane or toluene and mixtures thereof, to recover asphaltenes, resins and/or aromatics in said tar phase.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein n is an integer of from about 1 to about 10.
Claim 4
Dependent Claim
34 words
The process of claim 1 wherein the halogenated aliphatic solvent is a member selected from the group consisting of: Methylfluoride; Fluoroform; Chloro-fluoromethane; Bromo-fluoromethane; Chloro-difluoromethane; Chloro-trifluoromethane; Ethylfluoride; Difluoroethane; Bromo-fluoroethane; 2-bromo-1, difluoroethane; Chloro-trifluoroethane; Difluoro-di-chloro-ethane; Trifluoro-di-chloroethane; Tetrafluoro-di-chloroethane;
Claim 5
Dependent Claim
38 words
1,1, chloro-di-fluoroethane; 1,1,1, trifluoroethane; 1,2, Difluoropropane; 1,3, Difluoropropane; 1,2,3, trifluoropropane; 1, bromo-2, fluoropropane; 1, bromo-3, fluoropropane; Di-chloro-mono-fluoromethane; Tri-chloro-mono-fluoromethane; Mono-cloro-mono-bromo-mono-fluoromethane; Di-bromo-mono-fluoromethane; Tri-bromo-mono-fluoromethane; Tetra-chloro-di-fluoromethane; Tri-bromo-mono-fluoroethane; Tri-chloro-mono-fluoroethane; Tetrachloro-mono-fluoroethane; Tri-chloro-difluoroethane; Di-bromo-mono-fluoroethane; Trichloro-trifluoro-ethane; N-propylfluoride; Iso-propylfluoride; N-butylfluoride; N-amylfluoride; N-hexyfluoride; or N-heptylfluoride and mixtures thereof.
Claim 6
Dependent Claim
38 words
1,1, chloro-di-fluoroethane; 1,1,1, trifluoroethane; 1,2, Difluoropropane; 1,3, Difluoropropane; 1,2,3, trifluoropropane; 1, bromo-2, fluoropropane; 1, bromo-3, fluoropropane; Di-chloro-mono-fluoromethane; Tri-chloro-mono-fluoromethane; Mono-cloro-mono-bromo-mono-fluoromethane; Di-bromo-mono-fluoromethane; Tri-bromo-mono-fluoromethane; Tetra-chloro-di-fluoromethane; Tri-bromo-mono-fluoroethane; Tri-chloro-mono-fluoroethane; Tetrachloro-mono-fluoroethane; Tri-chloro-difluoroethane; Di-bromo-mono-fluoroethane; Trichloro-trifluoro-ethane; N-propylfluoride; Iso-propylfluoride; N-butylfluoride; N-amylfluoride; N-hexyfluoride; or N-heptylfluoride and mixtures thereof.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the halogenated aliphatic solvent is trichlorotrifluoroethane.
Claim 8
Dependent Claim
30 words
The process according to claim 1 wherein the halogenated aliphatic solvent is blended with the coal liquefaction product in a volume ratio range of from about 0.5:1 to about 5:1.
Claim 9
Dependent Claim
30 words
The process according to claim 1 wherein the halogenated aliphatic solvent is blended with the coal liquefaction product in a volume ratio range of from about 1:1 to about 3:1.
Claim 10
Dependent Claim
25 words
The process of claim 1 wherein the halogenated aliphatic solvent is blended with the coal liquefaction product for about 0.5 minute to about 60 minutes.
Claim 11
Dependent Claim
25 words
The process of claim 1 wherein the halogenated aliphatic solvent is blended with the coal liquefaction product for about 1 minute to about 30 minutes.
Claim 12
Dependent Claim
18 words
The process of claim 1 wherein the two phases are separated from each other by floatation and skimming.
Claim 13
Dependent Claim
17 words
The process of claim 1 wherein the two phases are separated from each other by rapid filtration.
Claim 14
Dependent Claim
16 words
The process of claim 1 wherein the two phases are separated from each other by centrifugation.
Claim 15
Dependent Claim
21 words
The process of claim 1 wherein the halogenated aliphatic solvent is separated from the tar and coal liquefaction product by distillation.
Claim 16
Dependent Claim
25 words
The process of claim 1 wherein the second solvent is added to the tar in a ratio range of from about 0.5:1 to about 10:1.
Claim 17
Dependent Claim
25 words
The process of claim 1 wherein the second solvent is added to the tar in a ratio range of from about 1:1 to about 5:1.
References Cited (Backward Citations)
US2871181A
Cited
US3583900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |