US4344838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal conversion catalysts
Assignee: Mobil Oil AS
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Filing: 1981-04-20
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Granted: 1982-08-17
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Expires: 2001-04-20
Abstract
Abstract A solvent extraction process for coal conversion wherein coal liquids are contacted with spent petroleum hydrogenation catalyst or spent demetallizing guard chamber adsorbent.
Inventors
- 👤 Thomas O. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:25
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/006; C10G1/08; C10G1/086
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
In a solvent extraction process for coal conversion wherein coal is slurried in an organic solvent and heated to a temperature sufficient to dissolve or liquefy most of the coal, the resulting coal liquefaction product is upgraded by catalytic hydrogenation, and a process-derived recycle solvent is hydrogenated and returned to the initial dissolution stage; the improvement which comprises contacting materials selected from the group consisting of said coal liquefaction product, and said process-derived recycle solvent with a catalyst selected from the group consisting of: (1) spent hydrogenation catalyst from processes for the hydrogenation of hydrocarbons selected from the group consisting of petroleum, petroleum-derived liquids, Fischer-Tropsch liquids, and shale oils; (2) spent adsorbent from guard chambers used to demetallize said hydrocarbons; and (3) mixtures thereof.
Claim 2
Dependent Claim
124 words
In a solvent extraction process for coal conversion wherein coal is slurried in an organic solvent and heated to a temperature sufficient to dissolve or liquefy most of the coal, the resulting coal liquefaction product is upgraded by catalytic hydrogenation, and a process-derived recycle solvent is hydrogenated and returned to the initial dissolution stage; the improvement which comprises contacting materials selected from the group consisting of said coal liquefaction product, and said process-derived recycle solvent with a catalyst selected from the group consisting of: (1) spent hydrogenation catalyst from processes for the hydrogenation of hydrocarbons selected from the group consisting of petroleum, petroleum-derived liquids, Fischer-Tropsch liquids, and shale oils; (2) spent adsorbent from guard chambers used to demetallize said hydrocarbons; and (3) mixtures thereof.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said catalyst further comprises alumina having metals, oxides, or sulfides of iron or nickel deposited thereon.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said catalyst further comprises a crystalline aluminosilicate having metals, oxides, or sulfides of iron or nickel deposited thereon.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said catalyst is spent hydrogenation catalyst from processes for the hydrogenation of petroleum or petroleum-derived liquids.
References Cited (Backward Citations)
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US4303497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |