US4049536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1976-05-17
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Granted: 1977-09-20
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Expires: 1996-05-17
Abstract
Abstract A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products by steps which include: (a) admixing said coal feed, a solvent, particularly a non-donor solvent, and an ortho-quinone compound, to form a coal liquid slurry, and then (b) contacting said coal liquid slurry with molecular hydrogen in a liquefaction zone at temperature and pressure sufficient to hydroconvert and liquefy the coal. In accordance with a preferred embodiment, the product from the liquefaction zone is separated by distillation into fractions inclusive of fractions boiling within about the 350 DEG -850 DEG F. range, and preferably within about the 400 DEG -700 DEG F. range, which can be recycled to the coal liquefaction zone for use in slurrying the coal. The ortho-quinone compound acts as a hydrogenation catalyst, causing adequate hydrogenation of the coal within the coal liquefaction zone in the presence of the molecular hydrogen without any necessity of employing a hydrogen donor solvent, and hence there is no necessity for hydrogenation of the solvent in a separate hydrogenation zone.
Inventors
- 👤 Karl W. Plumlee
- 👤 Lonnie W. Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:49
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/086; C10G1/002; C10G1/083
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products, which comprises: (a) admixing said coal feed, a solvent, and an ortho-quinone compound to form a coal liquid slurry, and then (b) contacting said coal liquid slurry with molecular hydrogen in a liquefaction zone at temperature and pressure sufficient to hydroconvert and liquefy the coal to form a liquid product mixture.
Claim 2
Dependent Claim
65 words
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products, which comprises: (a) admixing said coal feed, a solvent, and an ortho-quinone compound to form a coal liquid slurry, and then (b) contacting said coal liquid slurry with molecular hydrogen in a liquefaction zone at temperature and pressure sufficient to hydroconvert and liquefy the coal to form a liquid product mixture.
Claim 3
Dependent Claim
45 words
The process of claim 1 wherein the liquid product mixture from the coal liquefaction zone is separated into fractions, inclusive of a liquid solvent fraction, and said liquid solvent fraction is recycled for slurrying with the coal, without hydrogenation of the solvent prior to recycle.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the temperature of coal liquefaction ranges from about 700° F. to about 950° F.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein the temperature ranges from about 800° F. to about 900° F.
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein the pressure of the coal liquefaction zone ranges from about 300 psig to about 3000 psig.
Claim 7
Dependent Claim
17 words
The process of claim 5 where the pressure ranges from about 800 psig to about 2000 psig.
Claim 8
Dependent Claim
23 words
The process of claim 2 wherein said solvent is one boiling with a range of from about 350° F. to about 850° F.
Claim 9
Dependent Claim
23 words
The process of claim 7 wherein said solvent is one which boils within a range from about 400° F. to about 700° F.
Claim 10
Dependent Claim
59 words
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products, which comprises: (a) admixing said coal feed, a non-donor solvent, an ortho-quinone compound to form a coal liquid slurry, and then (b) contacting said coal liquid slurry with molecular hydrogen in a liquefaction zone at temperature and pressure sufficient to hydroconvert and liquefy the coal.
Claim 11
Dependent Claim
59 words
A process for liquefying a particulate coal feed to produce useful petroleum-like liquid products, which comprises: (a) admixing said coal feed, a non-donor solvent, an ortho-quinone compound to form a coal liquid slurry, and then (b) contacting said coal liquid slurry with molecular hydrogen in a liquefaction zone at temperature and pressure sufficient to hydroconvert and liquefy the coal.
Claim 12
Dependent Claim
20 words
The process of claim 9 wherein the temperature of coal liquefaction ranges from about 700° F. to about 950° F.
Claim 13
Dependent Claim
17 words
The process of claim 10 wherein the temperature ranges from about 800° F. to about 900° F.
Claim 14
Dependent Claim
22 words
The process of claim 9 wherein the pressure of the coal liquefaction zone ranges from about 300 psig to about 3000 psig.
Claim 15
Dependent Claim
17 words
The process of claim 12 where the pressure ranges from about 800 psig to about 2000 psig.
Claim 16
Dependent Claim
23 words
The process of claim 9 wherein said solvent is one boiling within a range of from about 350° F. to about 850° F.
Claim 17
Dependent Claim
23 words
The process of claim 14 wherein said solvent is one which boils within a range from about 400° F. to about 700° F.
References Cited (Backward Citations)
US3700583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |