Patent US4071434A successfully refreshed from Google Patents.
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 20:53
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)
CA878656A
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 |