US4299685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocracking of heavy oils/fly ash slurries
Assignee: Ministry of Natural Resources and Wildlife
•
Filing: 1980-03-03
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Granted: 1981-11-10
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Expires: 2000-03-03
Abstract
Abstract An improved process is described for the hydrocracking of heavy hydrocarbon oil, such as oils extracted from tar sands. The charge oil in the presence of an excess of hydrogen is passed through a tubular hydrocracking zone, and the effluent emerging from the top of the zone is separated into a gaseous stream containing a wide boiling range material and a liquid stream containing heavy hydrocarbons. According to the novel feature, the charge stock is in the form of a slurry of heavy hydrocarbon oil and finely divided fly ash or high ash coal fines. The presence of this ash in the charge stock serves to greatly reduce coke precursors and thereby prevent the formation of carbonaceous deposits in the reaction zone.
Inventors
- 👤 Chandra P. Khulbe
- 👤 Ramaswami Ranganathan
- 👤 Barry B. Pruden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/24; C10G47/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A process for hydrocracking a heavy hydrocarbon oil, a substantial proportion of which boils above 524° C. which comprises: (a) passing a slurry of said heavy hydrocarbon oil and finely divided fly ash or high ash coal fines in the presence of 500-50,000 scf of hydrogen per barrel of said hydrocarbon oil through a confined hydrocracking zone, said hydrocracking zone being maintained at a temperature between about 400° and 500° C., a pressure above 500 psig. and a space velocity between about 0.5 and 4.0 volumes of heavy hydrocarbon oil per hour per volume of hydrocracking zone capacity, (b) removing from said hydrocracking zone a mixed effluent containing a gaseous phase comprising hydrogen and vaporous hydrocarbons and a liquid phase comprising heavy hydrocarbons, and (c) separating said effluent into a gaseous stream containing hydrogen and vaporous hydrocarbons and a liquid stream containing heavy hydrocarbons.
Claim 2
Dependent Claim
144 words
A process for hydrocracking a heavy hydrocarbon oil, a substantial proportion of which boils above 524° C. which comprises: (a) passing a slurry of said heavy hydrocarbon oil and finely divided fly ash or high ash coal fines in the presence of 500-50,000 scf of hydrogen per barrel of said hydrocarbon oil through a confined hydrocracking zone, said hydrocracking zone being maintained at a temperature between about 400° and 500° C., a pressure above 500 psig. and a space velocity between about 0.5 and 4.0 volumes of heavy hydrocarbon oil per hour per volume of hydrocracking zone capacity, (b) removing from said hydrocracking zone a mixed effluent containing a gaseous phase comprising hydrogen and vaporous hydrocarbons and a liquid phase comprising heavy hydrocarbons, and (c) separating said effluent into a gaseous stream containing hydrogen and vaporous hydrocarbons and a liquid stream containing heavy hydrocarbons.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the slurry is moved upwardly through a tubular reactor.
Claim 4
Dependent Claim
18 words
A process according to claim 2 wherein the slurry is moved upwardly through a vertical empty column reactor.
Claim 5
Dependent Claim
31 words
A process according to claim 1 wherein the fly ash or high ash coal fines is present in an amount of 0.01-5 wt. % based on heavy hydrocarbon oil charge stock.
Claim 6
Dependent Claim
22 words
A process according to claim 4 wherein the fly ash or high ash coal fines is coated with a catalytically active metal.
Claim 7
Dependent Claim
31 words
A process according to claim 1, 4 or 5, wherein a large proportion of the fly ash or high ash coal fines has a particle size of less than 100 mesh.
Claim 8
Dependent Claim
17 words
A process according to claim 5 wherein the metal is selected from iron, tungsten, cobalt and molybdenum.
Claim 9
Dependent Claim
22 words
A process according to claim 1 wherein the separated liquid stream containing heavy hydrocarbons is recycled back into the confined hydrocracking zone.
Claim 10
Dependent Claim
33 words
A process according to claim 1 wherein fly ash or high ash coal fines carried over with the separated liquid stream containing heavy hydrocarbons are concentrated and recycled to the confined hydrocracking zone.
Claim 11
Dependent Claim
18 words
A process according to claim 9 wherein the concentrating is carried out by means of a cyclone separator.
References Cited (Backward Citations)
US3151057A
Cited
US3775296A
Cited
US3844937A
Cited
US4220518A
Cited
US4214977A
Cited
US4176051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |