US4080176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the beneficiation of solid fuel
Assignee: Shell USA Inc
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Filing: 1976-11-08
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Granted: 1978-03-21
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Expires: 1996-11-08
Abstract
Abstract The invention relates to a process for the beneficiation of solid fuel, in which a heat treatment at elevated pressure is applied to an aqueous suspension of the solid fuel in a finely divided form in the presence of an additive which, under the prevailing conditions, causes water-insoluble sulphur compounds to be converted into soluble compounds, after which fuel and water are separated.
Inventors
- 👤 Eke Verschuur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:08
CPC Classifications
C; C10; C10F; C10F5/00; C10L; C10L5/00; C10L5/02; C10L5/06; C10L9/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
100 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from the coal and oil, both originally containing organic sulfur and the coal additionally containing pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and an alkali metal hydroxide or alkaline earth metal hydroxide, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 2
Dependent Claim
100 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from the coal and oil, both originally containing organic sulfur and the coal additionally containing pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and an alkali metal hydroxide or alkaline earth metal hydroxide, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 3
Dependent Claim
12 words
The process of claim 1 including extracting the oil from the coal.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein the oil is recycled.
Claim 5
Dependent Claim
92 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from the coal and oil, both originally containing organic sulfur and the coal additionally containing pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with oil and iron oxide powder, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at the temperature until agglomerates of coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 6
Dependent Claim
92 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from the coal and oil, both originally containing organic sulfur and the coal additionally containing pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with oil and iron oxide powder, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at the temperature until agglomerates of coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 7
Dependent Claim
12 words
The process of claim 3 including extracting the oil from the coal.
Claim 8
Dependent Claim
11 words
The process of claim 5 where in the oil is recycled.
Claim 9
Dependent Claim
92 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from oil and coal which originally contains pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and an alkali metal hydroxide or alkaline earth metal hydroxide, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 10
Dependent Claim
92 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from oil and coal which originally contains pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and an alkali metal hydroxide or alkaline earth metal hydroxide, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 11
Dependent Claim
12 words
The process of claim 7 including extracting the oil from the coal.
Claim 12
Dependent Claim
10 words
The process of claim 8 wherein the oil is recycled.
Claim 13
Dependent Claim
86 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from oil and coal which originally contains pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and iron oxide powder, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 14
Dependent Claim
86 words
A process for deashing and dehydrating coal and for producing substantially sulfur-free agglomerates from oil and coal which originally contains pyritic sulfur, comprising forming an aqueous suspension of the coal in finely divided form with the oil and iron oxide powder, agitating and heating the suspension at a temperature of at least 150° C at a pressure higher than the vapor pressure of water at that temperature until agglomerates of the coal and oil are formed, and separating the agglomerates from the water, ash and sulfur.
Claim 15
Dependent Claim
12 words
The process of claim 10 including extracting the oil from the coal.
Claim 16
Dependent Claim
15 words
The process of claim 11 wherein the oil is recycled and added to other coal.
References Cited (Backward Citations)
US2183924A
Cited
US3640016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |