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US4079004A
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Method for separating undissolved solids from a coal liquefaction product
Assignee: Honeywell UOP LLC
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Filing: 1976-12-14
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Granted: 1978-03-14
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Expires: 1996-12-14
Abstract
Abstract Production of a low mineral content fuel from a coal liquefaction product utilizing a hydrogenated coal oil solvent and a light aromatic solvent in combination to remove suspended mineral solids.
Inventors
- 👤 Gim Tan
- 👤 John G. Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:04
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/006; C10G1/002; C10G1/04; C10G1/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A method for separating undissolved solids from a coal liquefaction product comprising the steps of: a. admixing said coal liquefaction product with a hydrogenated coal oil, having been hydrogenated to remove at least about 80% of the asphaltenes, and a light aromatic solvent, said light aromatic solvent being present from about 10 weight percent to about 1000 weight percent of said coal liquefaction product; and b. introducing the resulting mixture into a separation zone at a temperature from about 50° to about 400° F. and therein settling undissolved solids from the admixed liquids.
Claim 2
Independent Claim
93 words
A method for separating undissolved solids from a coal liquefaction product comprising the steps of: a. admixing said coal liquefaction product with a hydrogenated coal oil, having been hydrogenated to remove at least about 80% of the asphaltenes, and a light aromatic solvent, said light aromatic solvent being present from about 10 weight percent to about 1000 weight percent of said coal liquefaction product; and b. introducing the resulting mixture into a separation zone at a temperature from about 50° to about 400° F. and therein settling undissolved solids from the admixed liquids.
Claim 3
Dependent Claim
15 words
The process of claim 1 further characterized in that said light aromatic solvent is benzene.
Claim 4
Dependent Claim
15 words
The process of claim 1 further characterized in that said light aromatic solvent is toluene.
Claim 5
Dependent Claim
15 words
The process of claim 1 further characterized in that said light aromatic solvent is xylene.
Claim 6
Dependent Claim
29 words
The process of claim 1 further characterized in that said hydrogenated coal oil is from about 0.1 weight percent to about 1000 weight percent of said coal liquefaction product.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |