US4071434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oil from tar sands
Assignee: Phillips Petroleum Co
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Filing: 1976-08-30
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Granted: 1978-01-31
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Expires: 1996-08-30
Abstract
Abstract A tar sands slurry containing sand particles of varying sizes dispersed therein is passed into a classifier wherein it is subdivided into at least two streams, each stream containing either coarse or fine solids. The stream containing coarse solids is directed to a separate solids removal zone where the solids are removed. The effluent from the solids removal zone and the fine solid containing stream are then fed to a coking zone.
Inventors
- 👤 II Phillip H. Gifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:38
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10B; C10B53/00; C10B53/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
A process for recovery of oil and other valuable components from tar sand which comprises: a. introducing into a mixing zone tar sand and a sufficient amount of a solvent to form a flowable slurry; b. mixing tar sand and solvent in the mixing zone until a slurry of desired viscosity is produced; c. subdividing the slurry produced in step (b) into two streams, a first stream containing coarse solids and a second stream containing fine solids; d. passing the said first stream through a solids removal zone to remove the coarse solids therein; and e. introducing the first stream, after it has passed through the solids removal zone, and the second stream, still containing the fine solids, into a coking zone to produce vapors and coke.
Claim 2
Dependent Claim
127 words
A process for recovery of oil and other valuable components from tar sand which comprises: a. introducing into a mixing zone tar sand and a sufficient amount of a solvent to form a flowable slurry; b. mixing tar sand and solvent in the mixing zone until a slurry of desired viscosity is produced; c. subdividing the slurry produced in step (b) into two streams, a first stream containing coarse solids and a second stream containing fine solids; d. passing the said first stream through a solids removal zone to remove the coarse solids therein; and e. introducing the first stream, after it has passed through the solids removal zone, and the second stream, still containing the fine solids, into a coking zone to produce vapors and coke.
Claim 3
Dependent Claim
173 words
A process for recovery of oil and other valuable components from tar sand which comprises: a. introducing into a mixing zone tar sand and a sufficient amount of a solvent comprising a heavy bottoms oil to form a flowable slurry; b. mixing tar sand and solvent in the mixing zone until a slurry of desired viscosity is produced; c. subdividing the slurry produced in step (b) into two streams, a first stream containing coarse solids and a second stream containing fine solids; d. passing the said first stream through a solids removal zone to remove the coarse solids therein; e. introducing the first stream, after it has passed through the solids removal zone, and the second stream, still containing the fine solids, into a coking zone to produce vapors and coke; f. withdrawing the coke produced in the coking zone; g. feeding the vapors produced in the coking zone into a fractionating zone; and h. fractionating the liquid vapors to produce gas, gasoline, oil fractions including high boiling fractions, and heavy bottoms oil.
Claim 4
Dependent Claim
173 words
A process for recovery of oil and other valuable components from tar sand which comprises: a. introducing into a mixing zone tar sand and a sufficient amount of a solvent comprising a heavy bottoms oil to form a flowable slurry; b. mixing tar sand and solvent in the mixing zone until a slurry of desired viscosity is produced; c. subdividing the slurry produced in step (b) into two streams, a first stream containing coarse solids and a second stream containing fine solids; d. passing the said first stream through a solids removal zone to remove the coarse solids therein; e. introducing the first stream, after it has passed through the solids removal zone, and the second stream, still containing the fine solids, into a coking zone to produce vapors and coke; f. withdrawing the coke produced in the coking zone; g. feeding the vapors produced in the coking zone into a fractionating zone; and h. fractionating the liquid vapors to produce gas, gasoline, oil fractions including high boiling fractions, and heavy bottoms oil.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 2 further comprising recycling the heavy liquid bottoms oil from the fractionating zone to the mixing zone.
Claim 6
Dependent Claim
18 words
A process as claimed in claim 3 wherein passing the first stream through the separation zone includes filtering.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 3 wherein passing the first stream through the separation zone includes allowing the coarse sand to settle.
References Cited (Backward Citations)
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Cited
US2910424A
Cited
US2885339A
Cited
US3070541A
Cited
US3466240A
Cited
US3480540A
Cited
US3553099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |