Patent US6013104A successfully refreshed from Google Patents.
Patent US4298450A successfully refreshed from Google Patents.
US4298450A
Expired / Lapsed
US
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Alcohols as hydrogen-donor solvents for treatment of coal
Assignee: United States Department of Energy
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Filing: 1977-12-05
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Granted: 1981-11-03
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Expires: 1997-12-05
Abstract
Abstract A method for the hydroconversion of coal by solvent treatment at elevated temperatures and pressure wherein an alcohol having an alpha -hydrogen atom, particularly a secondary alcohol such as isopropanol, is utilized as a hydrogen donor solvent. In a particular embodiment, a base capable of providing a catalytically effective amount of the corresponding alcoholate anion under the solvent treatment conditions is added to catalyze the alcohol-coal reaction.
Inventors
- 👤 David S. Ross
- 👤 James E. Blessing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:01
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/042
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
In a method for the hydroconversion of coal by solvent treatment with a hydrogen-donor solvent under conditions to promote hydroconversion of the coal by hydrogen transfer activity, the improvement comprising utilizing as the hydrogen-donor solvent an alcohol having an α-hydrogen atom, and carrying out the solvent treatment step in the presence of a base capable of providing a catalytically effective amount of the corresponding alcoholate anion under the hydroconversion conditions.
Claim 2
Dependent Claim
70 words
In a method for the hydroconversion of coal by solvent treatment with a hydrogen-donor solvent under conditions to promote hydroconversion of the coal by hydrogen transfer activity, the improvement comprising utilizing as the hydrogen-donor solvent an alcohol having an α-hydrogen atom, and carrying out the solvent treatment step in the presence of a base capable of providing a catalytically effective amount of the corresponding alcoholate anion under the hydroconversion conditions.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the solvent treatment is carried out at a temperature of at least 300° C.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein the base is an alkali metal hydroxide.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the alcohol is a secondary alcohol.
Claim 6
Dependent Claim
14 words
A method according to claim 4 wherein the alcohol is a secondary alkyl alcohol.
Claim 7
Dependent Claim
12 words
A method according to claim 5 wherein the alcohol is isopropyl alcohol.
Claim 8
Dependent Claim
12 words
A method according to claim 6 wherein the base is potassium isopropoxide.
Claim 9
Dependent Claim
12 words
A method according to claim 6 wherein the base is potassium hydroxide.
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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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |