US3619404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction
Assignee: Atlantic Richfield Co
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Filing: 1970-11-09
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Granted: 1971-11-09
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Expires: 1990-11-09
Abstract
Abstract Normally solid coal is hydrogenated using certain supported hydrogenation catalysts in the substantial absence of externally supplied liquid slurry medium and in a catalyst/coal weight ratio of from about 0.1/1 to about 2/1.
Inventors
- 👤 Robert W Rieve
- 👤 Harold Shalit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
A method according to claim 1 wherein said hydrogenation operation comprises mixing subdivided coal with at least one of molecular hydrogen in an amount sufficient to provide a hydrogen partial pressure of from about 400 to about 8,000 p.s.i.a., and maintaining the mixture under a temperature of from about 500* to about 1,500* F. and a total pressure of from about 400 to about 10,000 p.s.i.g. for a time sufficient to at least partially liquefy at least part of the coal.
Claim 2
Dependent Claim
44 words
A method according to claim 1 wherein said catalyst is one of Fe, Co, Ni, V, Mo, or W, or the halide, oxide, sulfide, molybdate, sulfate, or oxalate of said metals or combinations of two or more of said metals and/or said compounds thereof.
Claim 3
Dependent Claim
27 words
A method according to claim 3 wherein said catalyst is supported on at least one of alumina, silica, magnesia, zirconia, titania, clay, carbon, fullers earth or kieselghur.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said catalyst is sulfided CoO and MoO3 supported on alumina.
Claim 5
Dependent Claim
18 words
A methOd according to claim 1 wherein said catalyst/coal weight ratio is from about 0.5/1 to about 1.5/1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |