US4257922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coal liquefaction and catalyst
Assignee: Electric Power Research Institute
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Filing: 1979-03-13
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Granted: 1981-03-24
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Expires: 1999-03-13
Abstract
Abstract A method for hydroconversion of coal solids in a solvent by contact with molecular hydrogen and catalyst solids in a reactor. The catalyst solids are catalytically active substances including promoted or unpromoted molybdenum on an alumina support material. The support is characterized by bimodal pore distribution with the average diameter of the smaller pores ranging from about 100-200 angstroms and preferably 120-140 angstroms, and average diameter of the larger pores being in excess of 1,000 angstroms.
Inventors
- 👤 Dae K. Kim
- 👤 Ralph J. Bertolacini
- 👤 L. Charles Gutberlet
- 👤 Ken K. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:16
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J23/00; B01J23/16; B01J23/24; B01J23/28; C; C10; C10G; C10G1/00; C10G1/08; C10G1/086; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/64; B01J35/647; B01J35/651; B01J35/66; B01J35/69
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A supported catalyst suitable for hydroconversion of coal solids to coal liquids, said catalyst comprising a catalytically active substance on support particles, said particles having essentially bimodal pore distribution with peak concentrations of smaller pores below about 600 angstroms and a peak concentration of larger pores above about 600 angstroms, the average diameter of the smaller pores ranging from about 100-200 angstroms, and the average diameter of the larger pores being in excess of 1,000 angstroms, said catalyst including at least 5% of the total pore volume of the larger pores and at least 70% of the total pore volume of the smaller pores.
Claim 2
Dependent Claim
104 words
A supported catalyst suitable for hydroconversion of coal solids to coal liquids, said catalyst comprising a catalytically active substance on support particles, said particles having essentially bimodal pore distribution with peak concentrations of smaller pores below about 600 angstroms and a peak concentration of larger pores above about 600 angstroms, the average diameter of the smaller pores ranging from about 100-200 angstroms, and the average diameter of the larger pores being in excess of 1,000 angstroms, said catalyst including at least 5% of the total pore volume of the larger pores and at least 70% of the total pore volume of the smaller pores.
Claim 3
Dependent Claim
35 words
The supported catalyst of claim 1 including from about 7 to 20% of the total pore volume of the smaller pores and about 80 to 93% of the total pore volume of the larger pores.
Claim 4
Dependent Claim
14 words
The supported catalyst of claim 1 in which said catalytically active substance contains molybdenum.
Claim 5
Dependent Claim
16 words
The supported catalyst of claim 1 with an average smaller pore diameter of about 120-140 angstroms.
Claim 6
Dependent Claim
15 words
The supported catalyst of claim 1 in which said support particles are comprised of alumina.
Claim 7
Dependent Claim
19 words
The supported catalyst of claim 1 having a surface area ranging from about 100 to 250 m 2 /gm.
Claim 8
Dependent Claim
17 words
The supported catalyst of claim 3 in which said catalytically active substance consists essentially of unpromoted molybdenum.
Claim 9
Dependent Claim
29 words
The supported catalyst of claim 3 in which said catalytically active substance consists essentially of molybdenum and a member of the group consisting of cobalt, nickel, and mixtures thereof.
References Cited (Backward Citations)
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US3322666A
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US3393148A
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US3635814A
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US3985684A
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US3998722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |