US4126426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomerating coal slurry particles
Assignee: Shell USA Inc
•
Filing: 1977-12-12
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Granted: 1978-11-21
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Expires: 1997-12-12
Abstract
Abstract A process for preparing a solid load of coal from an aqueous slurry of coal particles by dividing the slurry into a first fraction containing relatively small particles and a second fraction containing relatively large particles, agglomerating the particles in the first fraction under turbulent conditions with a binder and separating the thus-obtained agglomerates from the water phase and mixing the agglomerates with the second fraction.
Inventors
- 👤 Eke Verschuur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:36
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C10L5/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A process for preparing a solid load of coal from an aqueous slurry of coal particles which comprises dividing the slurry into a first fraction containing relatively small particles and a second fraction containing relatively large particles, agglomerating the particles in the first fraction under turbulent conditions with an amount of less than 10 weight percent, based on the weight of the small particles, of a binder and separating the thus-obtained agglomerates from a water phase and mixing the agglomerates with the second fraction.
Claim 2
Dependent Claim
84 words
A process for preparing a solid load of coal from an aqueous slurry of coal particles which comprises dividing the slurry into a first fraction containing relatively small particles and a second fraction containing relatively large particles, agglomerating the particles in the first fraction under turbulent conditions with an amount of less than 10 weight percent, based on the weight of the small particles, of a binder and separating the thus-obtained agglomerates from a water phase and mixing the agglomerates with the second fraction.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1 in which the mixture is dried mechanically and then further dried thermally in a fluidized bed.
Claim 4
Dependent Claim
28 words
A process as claimed in claim 1 in which the first fraction predominantly contains particles smaller than 0.1 mm and the second fraction particles larger than 0.1 mm.
Claim 5
Dependent Claim
14 words
A process as claimed in claim 1 in which the first fraction contains ash.
Claim 6
Dependent Claim
17 words
A process as claimed in claim 1 in which a binder based on liquid hydrocarbons is used.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 1 in which a solid load of coal is prepared having a water content of below 15 weight percent.
Claim 8
Dependent Claim
44 words
A process as claimed in claim 1 in which the agglomeration of the coal particles in the first fraction is carried out at elevated temperature and in which mechanical drying of the agglomerates and the second fraction is also carried out at elevated temperature.
References Cited (Backward Citations)
US2590733A
Cited
US3168350A
Cited
US3775070A
Cited
US3579442A
Cited
US3957456A
Cited
US4021206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |