Patent US3617465A successfully refreshed from Google Patents.
US3617465A
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Coal hydrogenation
Assignee: HRI Inc
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Filing: 1969-11-20
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Granted: 1971-11-02
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Expires: 1989-11-20
Abstract
Abstract A coal hydrogenation process employing an expanded particulate solids bed wherein the solids are derived from the coal which is placed in random motion by the upflow of a slurry of coal, hydrocarbon liquid and hydrogen to produce better than 80 percent conversion of coal to gas and liquid synthetic petroleum products. The particulate solids bed is derived from the coal being fed to the reaction zone.
Inventors
- 👤 Ronald H Wolk
- 👤 Edwin S Johanson
- 👤 Seymour B Alpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:25
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10G1/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
The process of claim 1 wherein the hydrogenation of the coal autogenously produces the contact particles maintained in the reaction zone.
Claim 2
Dependent Claim
11 words
The process of claim 2 wherein said contact particles are ash.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the ash concentration within the reaction zone is maintained in excess of 4 percent by selective recycle of reaction zone effluent.
Claim 4
Dependent Claim
46 words
The process of claim 1 wherein the recycle consists of a portion of the liquid effluent, from the reaction zone, containing char, ash and unreacted coal and a portion of the vacuum gas oil obtained from the fractioNation of the remaining portion of said liquid effluent.
Claim 5
Dependent Claim
31 words
The process of claim 4 wherein the recycle also includes a portion of a filtered low solids concentration liquid obtained from the fractionation of said remaining portion of said liquid effluent.
Claim 6
Dependent Claim
28 words
The process of claim 5 wherein the recycle also includes a portion of a vacuum bottoms obtained from the fractionation of said remaining portion of said liquid effluent.
Claim 7
Dependent Claim
195 words
In the process of hydroconversion of coal to hydrocarbons wherein the coal is preliminarily dried, ground and screened to provide a coal feed substantially moisture free having relatively close sizing, and said coal feed is slurried with a subsequently recovered slurry liquid hereinafter defined, said slurry having from at least 1 to not more than 10 parts of slurry liquid per part of coal feed, and said slurry, together with hydrogen-rich gas is passed upwardly through a reactor in the absence of a catalyst under temperature and pressure conditions to effect a substantial hydroconversion of the coal to liquid and gas hydrocarbons, the liquid effluent from said reactor being fractionated into a relatively heavy bottoms material and other liquid and gaseous products the improvement which comprises: using said heavy bottoms material as the slurry liquid; said slurry liquid containing at least 1 part per 100 of normally char, unconverted coal solids and ash, whereby the concentration of char, unconverted coal solids and ash in the reactor exceeds that of the slurry liquid, such char, coal solids and ash having such a concentration as to enhance the hydrocarbon yield over that of a once through operation.
Claim 8
Dependent Claim
17 words
The process of claim 8 wherein the ash concentration in the reactor is at least 4 percent.
References Cited (Backward Citations)
USRE25770E
Cited
US2885337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |