Patent US4052291A successfully refreshed from Google Patents.
US4052291A
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Production of asphalt cement
Assignee: Mobil Oil AS
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Filing: 1976-08-16
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Granted: 1977-10-04
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Expires: 1996-08-16
Abstract
Abstract This invention provides a novel asphalt cement which is produced by solubilizing solvent-refined coal in a thermally stable refinery petroleum solvent.
Inventors
- 👤 Wilton F. Espenscheid
- 👤 Tsoung-Yuan Yan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:07
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/042; C10C; C10C3/00; C10C3/005; C10G1/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
133 words
A process for producing asphalt cement which comprises (1) forming a slurry by admixing solvent-refined coal with a fluidized catalytic cracking main column bottoms petroleum solvent in admixture quantities between about 1.0 and 5 parts by weight of petroleum solvent per part by weight of solent-refined coal, wherein said petroleum solvent has a hydrogen content distribution in which the H ar proton content is between about 30 and 50 percent, the H.sub.α proton content is at least about 30 percent, and the H.sub.α /H.sub.β proton ratio is above about 1.4; and (2) heating said slurry at a temperature between about 350+ F and 850° F for a period of time between about 0.2 and 2 hours to convert the slurry into a homogeneous composition which has a flowable asphaltic consistency at standard temperature.
Claim 2
Dependent Claim
133 words
A process for producing asphalt cement which comprises (1) forming a slurry by admixing solvent-refined coal with a fluidized catalytic cracking main column bottoms petroleum solvent in admixture quantities between about 1.0 and 5 parts by weight of petroleum solvent per part by weight of solent-refined coal, wherein said petroleum solvent has a hydrogen content distribution in which the H ar proton content is between about 30 and 50 percent, the H.sub.α proton content is at least about 30 percent, and the H.sub.α /H.sub.β proton ratio is above about 1.4; and (2) heating said slurry at a temperature between about 350+ F and 850° F for a period of time between about 0.2 and 2 hours to convert the slurry into a homogeneous composition which has a flowable asphaltic consistency at standard temperature.
Claim 3
Dependent Claim
15 words
A homogeneous ash-free asphalt cement composition produced in accordance with the process of claim 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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |