US4151066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction process
Assignee: Mobil Oil AS
•
Filing: 1978-01-12
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Granted: 1979-04-24
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Expires: 1998-01-12
Abstract
Abstract This invention provides an improved method for solubilizing carbonaceous materials which comprises contacting and dissolving comminuted coal in a highly aromatic petroleum residum solvent having a special chemical constituency and physical properties, and thereafter separating the solution phase from the undissolved solids.
Inventors
- 👤 Tsoung-Yuan Yan
- 👤 Wilton F. Espenscheid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:19
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/042
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A process for the liquefaction of carbonaceous material selected from the group consisting of coal, lignite and peat which comprises the steps of (1) forming a slurry by admixing said carbonaceous material in comminuted form with a highly aromatic petroleum residuum solvent having a boiling point between about 450° F. and 1200° F. which has (a) an H Ar proton content between about 30 and 50 percent, (b) a H.sub.α proton content of at least 30 percent, (c) a H.sub.β proton content below 20 percent, (d) a H.sub.γ proton content below 13 percent, and (e) a H.sub.α /H.sub.β proton ratio above about 1.4; and (2) heating said slurry at a temperature between about 350° F. and 850° F. for a period of time sufficient to solubilize said carbonaceous material and form a homogeneous liquefaction solution phase and a solids phase containing ash and undissolved solids.
Claim 2
Dependent Claim
145 words
A process for the liquefaction of carbonaceous material selected from the group consisting of coal, lignite and peat which comprises the steps of (1) forming a slurry by admixing said carbonaceous material in comminuted form with a highly aromatic petroleum residuum solvent having a boiling point between about 450° F. and 1200° F. which has (a) an H Ar proton content between about 30 and 50 percent, (b) a H.sub.α proton content of at least 30 percent, (c) a H.sub.β proton content below 20 percent, (d) a H.sub.γ proton content below 13 percent, and (e) a H.sub.α /H.sub.β proton ratio above about 1.4; and (2) heating said slurry at a temperature between about 350° F. and 850° F. for a period of time sufficient to solubilize said carbonaceous material and form a homogeneous liquefaction solution phase and a solids phase containing ash and undissolved solids.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein the petroleum residuum solvent is selected from the group consisting of FCC main column bottoms and TCC syntower bottoms.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the amount of solvent employed is between 0.5 and 10 parts by weight per part by weight of carbonaceous material.
Claim 5
Dependent Claim
15 words
The method of claim 3 wherein the slurry is heated between 0.2 and 3 hours.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein the carbonaceous material is coal.
Claim 7
Dependent Claim
11 words
The method of claim 4 wherein the carbonaceous material is lignite.
Claim 8
Dependent Claim
11 words
The method of claim 4 wherein the carbonaceous material is peat.
References Cited (Backward Citations)
US3607718A
Cited
US3642608A
Cited
US3725240A
Cited
US4040941A
Cited
US4032428A
Cited
US4052291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |