Patent US4015731A successfully refreshed from Google Patents.
US4015731A
Expired / Lapsed
US
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Preparation of a wet load of coal for transport and storage
Assignee: Shell USA Inc
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Filing: 1975-11-20
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Granted: 1977-04-05
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Expires: 1995-11-20
Abstract
Abstract Method for the preparation of a wet load of coal with a bulk density of at least 700 kg/m 3 by preparing briquettes containing less than 10% wt water from an aqueous slurry of coal fines, such as from a pipeline, and mixing the briquettes with wet coal fines or extrudates or agglomerates thereof containing up to 30% wt water. The briquettes can be prepared by dewatering the slurry, extrudating the obtained paste and briquetting the extrudates; or by agglomerating the coal fines, for example with naphtha, and briquetting the agglomerates, for example by removal of naphtha.
Inventors
- 👤 Eke Verschuur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:12
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C10L5/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A method of transporting coal by ship, in which the ship is loaded with a wet load of coal prepared from an aqueous slurry of coal fines, the wet load of coal having less water than the slurry to economize transportation and being resistant to settling and compacting of the fines in the coal to facilitate removal of the wet load of coal from the ship, comprising preparing briquettes with a dry appearance containing less then 20% by weight of water from the aqueous slurry of coal fines and subsequently mixing the briquettes with a mass of water and coal fines, and loading the ship with the resulting wet load of coal.
Claim 2
Independent Claim
112 words
A method of transporting coal by ship, in which the ship is loaded with a wet load of coal prepared from an aqueous slurry of coal fines, the wet load of coal having less water than the slurry to economize transportation and being resistant to settling and compacting of the fines in the coal to facilitate removal of the wet load of coal from the ship, comprising preparing briquettes with a dry appearance containing less then 20% by weight of water from the aqueous slurry of coal fines and subsequently mixing the briquettes with a mass of water and coal fines, and loading the ship with the resulting wet load of coal.
Claim 3
Dependent Claim
17 words
The method of claim 1 in which the aqueous coal slurry has been withdrawn from a pipeline.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |