US3852183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction
Assignee: Lummus Technology LLC
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Filing: 1972-12-29
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Granted: 1974-12-03
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Expires: 1992-12-29
Abstract
Abstract Coal is liquefied under controlled conditions to produce a coal liquefaction product having a Deashability Index (D.I.) of 10-18 wherein D.I. is the weight ratio of ash free benzene insolubles in the product to ash free carbonaceous matter dissolved and dispersed in the liquefaction solvent times 100. The controlled Deashability Index facilitates separation of insoluble material.
Inventors
- 👤 G Snell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10G1/065; C10G1/08; C10G1/083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A PROCESS FOR LIQUEFYING COAL TO PRODUCE A COAL LIQUEFACTION PRODUCT FROM WHICH INSOLUBLE MATERIAL IS MORE FACILELY SEPARATED, COMPRISING: HYDROGENATING COAL IN CONTACT WITH A COAL LIQUEFACTION SOLVENT TO EFFECT LIQUEFACTION THEREOF, SAID HYDROGENATION BEING EFFECTED AT A TEMPERATURE OF FROM ABOUT 700*F TO ABOUT 900*F, A SPACE VELOCITY FROM ABOUT 1.0 TO ABOUT 4.0 HR.-1 AND A HYDROGEN PARTIAL PRESSURE FROM ABOUT 800 TO ABOUT 3,000 PSIA TO PRODUCE A COAL LIQUEFACTION PRODUCT COMPRISED OF CARBONACEOUS MATTER DISSOLVED IN THE COAL LIQUEFACTION SOLVENT AND INSOLUNLE MATERIAL DISPERSED IN THE LIQUEFACTION SOLVENT HAVING A WEIGHT RATIO OF ASH FREE BENZENE INSOLUBLES IN THE PRODUCT TO MOISTURE ASH FREE CARBONACEOUS MATTER DISSOLVED AND DISPERSED IN THE COAL LIQUEFACTION SOLVENT FROM ABOUT 0.10 TO ABOUT 0.18.
Claim 2
Dependent Claim
125 words
A PROCESS FOR LIQUEFYING COAL TO PRODUCE A COAL LIQUEFACTION PRODUCT FROM WHICH INSOLUBLE MATERIAL IS MORE FACILELY SEPARATED, COMPRISING: HYDROGENATING COAL IN CONTACT WITH A COAL LIQUEFACTION SOLVENT TO EFFECT LIQUEFACTION THEREOF, SAID HYDROGENATION BEING EFFECTED AT A TEMPERATURE OF FROM ABOUT 700*F TO ABOUT 900*F, A SPACE VELOCITY FROM ABOUT 1.0 TO ABOUT 4.0 HR.-1 AND A HYDROGEN PARTIAL PRESSURE FROM ABOUT 800 TO ABOUT 3,000 PSIA TO PRODUCE A COAL LIQUEFACTION PRODUCT COMPRISED OF CARBONACEOUS MATTER DISSOLVED IN THE COAL LIQUEFACTION SOLVENT AND INSOLUNLE MATERIAL DISPERSED IN THE LIQUEFACTION SOLVENT HAVING A WEIGHT RATIO OF ASH FREE BENZENE INSOLUBLES IN THE PRODUCT TO MOISTURE ASH FREE CARBONACEOUS MATTER DISSOLVED AND DISPERSED IN THE COAL LIQUEFACTION SOLVENT FROM ABOUT 0.10 TO ABOUT 0.18.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said hydrogenating is effected in the presence of a catalyst.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said hydrogenation is effected in an upflow ebullating bed of said catalyst.
Claim 5
Dependent Claim
20 words
The process of claim 3 wherein said coal liquefaction solvent boils within the range from about 600*F. to about 900*F.
Claim 6
Dependent Claim
16 words
The process of claim 1 and further comprising: separating insoluble material from the coal liquefaction product.
Claim 7
Dependent Claim
115 words
The process of claim 5 wherein said insoluble material is separated by gravity settling, said gravity settling being effected with the coal liquefaction product in contact with a promoter liquid, said liquid promoter having a 5 volume percent distillation temperature of at least about 250*F. and a 95 volume percent distillation temperature of at least about 350*F. and no greater than about 750*F., said liquid promoter having a characterization factor (K) of at least 9.75, said liquid promoter having a characterization factor greater than said coal liquefaction solvent; said promoter liquid being added in an amount sufficient to promote and enhance gravity settling of insoluble material to produce an overflow essentially free of insoluble material.
Claim 8
Dependent Claim
25 words
The process of claim 2 wherein the catalyst is selected from the group consisting of cobalt molybdate, tungsten nickel sulfide, nickel molybdate and mixtures thereof.
Claim 9
Dependent Claim
16 words
The process of claim 1 wherein said weight ratio is from about 0.11 to about 0.15.
References Cited (Backward Citations)
US2987465A
Cited
US3184401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |