Patent US3607719A successfully refreshed from Google Patents.
US3607719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure hydrogenation of coal
Assignee: HRI Inc
•
Filing: 1969-11-13
•
Granted: 1971-09-21
•
Expires: 1989-11-13
Abstract
Abstract The hydroconversion of coal to benzene-soluble hydrocarbon products is accomplished at conversion pressures with a hydrogen partial pressure of less than about 1,000 p.s.i. in the presence of a hydrogen donor oil and a particulate contact material. Under these operating conditions, the particulate contact material is maintained in random motion. Hydrogen partial pressures as low as 350 p.s.i. are practical and economical. From the resulting liquid effluent, a distillate fraction is recovered and it is further hydrogenated to produce an effective hydrogen donor oil.
Inventors
- 👤 Clarence A Johnson
- 👤 Edwin S Johanson
- 👤 Ronald H Wolk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:22
CPC Classifications
C; C10; C10G; C10G45/00; C10G1/00; C10G1/002; C10G1/08; C10G1/083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
The process of claim 1 wherein the carbonaceous solids take up an amount of hydrogen equivalent to 2 to 4 percent of the weight of said carbonaceous solids present with at least 25 percent up to 75 percent of said hydrogen taken up coming from the hydrogen donor oil.
Claim 2
Dependent Claim
43 words
The process of claim 1 wherein a bottoms fraction from the separation of the liquid effluent is passed to said reaction zone so as to maintain a residuum concentration therein so as to promote further hydroconversion of said bottoms to lower boiling distillates.
Claim 3
Dependent Claim
86 words
The process of claim 1 wherein the hydroconversion of carbonaceous solids is carried out under a hydrogen partial pressure of about 500 p.s.i. with a coal throughput rate between about 15 and about 50 lbs. of coal per hour per cubic foot of reactor while hydrogenating the fraction boiling between 500* and 1,000* F. at a hydrogen partial pressure between about 1,000 and about 2,000 p.s.i. at 700* to 800* F. to produce a hydrogen donor oil containing between about 7 and about 11 percent hydrogen.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |