Patent US4242102A successfully refreshed from Google Patents.
US4242102A
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US
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Production of gasified products from ash containing bitumen produced in coal liquefaction
Assignee: Lummus Technology LLC
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Filing: 1978-12-15
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Granted: 1980-12-30
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Expires: 1998-12-15
Abstract
Abstract An ash containing heavy bitumen recovered from the deashing step of a coal liquefaction process is subjected to vacuum flashing to provide a residual product having a softening point of no less than 350 DEG F. and no greater than 550 DEG F. Subsequently, the flashed product is solidified and pulverized so that 100 percent passes through a 100 mesh screen. The pulverized fraction, without prior coking thereof, is entrained in a gas stream and then subjected to gasification.
Inventors
- 👤 George J. Snell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:42
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/72; C10J3/74; C10J3/78; C10J3/86; C10J2300/00; C10J2300/09; C10J2300/0903; C10J2300/0906; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/0979
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
In a process for the liquefaction of coal wherein an essentially ash free liquid coal fraction is separated from an ash containing heavy bitumen fraction, the improvement comprising: subjecting said ash containing bitumen fraction to vacuum flashing to provide a residual product having a softening point of no less than 350° F. and no greater than 550° F.; solidifying said residual product; pulverizing the solidified residual product to a particle size such that 100 percent passes through a 100 mesh screen; and employing said pulverized solidified residual product, without prior coking thereof as feed to an entrained bed gasification process by entrainment in a gasification gas to produce gaseous product therefrom. Reconsideration and allowance of this application are requested.
Claim 2
Dependent Claim
119 words
In a process for the liquefaction of coal wherein an essentially ash free liquid coal fraction is separated from an ash containing heavy bitumen fraction, the improvement comprising: subjecting said ash containing bitumen fraction to vacuum flashing to provide a residual product having a softening point of no less than 350° F. and no greater than 550° F.; solidifying said residual product; pulverizing the solidified residual product to a particle size such that 100 percent passes through a 100 mesh screen; and employing said pulverized solidified residual product, without prior coking thereof as feed to an entrained bed gasification process by entrainment in a gasification gas to produce gaseous product therefrom. Reconsideration and allowance of this application are requested.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the residual product has an ash content of from 15 to 45 percent, by weight.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein the vacuum flashing is effected at a temperature of from 550° F. to 650° F. and a pressure of from 25 mm Hg to 100 mm Hg, absolute.
Claim 5
Dependent Claim
33 words
The process of claim 2 wherein the gasification is effected with steam and oxygen at a temperature of from 1800° F. to 3000° F. and a pressure of from 50 to 1000 psig.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the softening point of the residual product is from 400° to 500° F.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the ash content of the residual product is from 20 to 40 percent by weight.
Claim 8
Dependent Claim
66 words
The process of claim 1 wherein the ash containing heavy bitumen is separated from the ash free liquid coal fraction by gravity settling in the presence of a promoter liquid having a characterization factor of at least 9.75, a 5 volume percent distillation temperature of at least 250° F. and a 95 percent distillation temperature of at least 350° F. and no greater than 750° F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |