US4250015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanochemical hydrogenation of coal
Assignee: United States Department of Energy
•
Filing: 1978-12-18
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Granted: 1981-02-10
•
Expires: 1998-12-18
Abstract
Abstract Hydrogenation of coal is improved through the use of a mechanical force to reduce the size of the particulate coal simultaneously with the introduction of gaseous hydrogen, or other hydrogen donor composition. Such hydrogen in the presence of elemental tin during this one-step size reduction-hydrogenation further improves the yield of the liquid hydrocarbon product.
Inventors
- 👤 Ralph T. Yang
- 👤 Robert Smol
- 👤 Gerald Farber
- 👤 Leonard M. Naphtali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:54
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/083
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
35 words
A method for the hydrogenation of coal comprising applying a force to coal particulates to reduce the size of the particulate coal in contact with elemental tin catalyst and a hydrogen donor to form hydrocarbons.
Claim 2
Independent Claim
35 words
A method for the hydrogenation of coal comprising applying a force to coal particulates to reduce the size of the particulate coal in contact with elemental tin catalyst and a hydrogen donor to form hydrocarbons.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein the hydrogen donor comprises gaseous hydrogen.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the hydrogen donor comprises a liquid.
Claim 5
Dependent Claim
11 words
The method of claim 1, further comprising heating the hydrogen donor.
Claim 6
Dependent Claim
18 words
The method of claim 1, wherein reducing the size of particulate coal occurs after providing the elemental tin.
Claim 7
Dependent Claim
24 words
The method of claim 1, wherein the reducing of the size of the particulate coal occurs simultaneously with the contact with the elemental tin.
Claim 8
Dependent Claim
23 words
The method of claim 1, wherein the tin is present in an amount of from 0.1% to 10% by weight of the coal.
Claim 9
Dependent Claim
18 words
The method of claim 2, wherein the hydrogen is maintained at pressures above about 100 psig during hydrogenation.
Claim 10
Dependent Claim
18 words
The method of claim 4, wherein the temperature of the hydrogen donor is 250° C. to 650° C.
Claim 11
Dependent Claim
14 words
The method of claim 8, wherein the hydrogen pressure is 400 to 1200 psig.
Claim 12
Dependent Claim
17 words
The method of claim 7, wherein the tin is present as 1% by weight of the coal.
References Cited (Backward Citations)
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US1712082A
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |