US3807987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil soot handling system
Assignee: JOY ENVIRONMENTAL EQUIPMENT Co
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Filing: 1972-04-10
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Granted: 1974-04-30
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Expires: 1992-04-10
Abstract
Abstract Valuable metals, particularly vanadium, may be recovered from oil soot by firing crude oil to produce oil soot, collecting the soot, and recycling the collected soot for refiring until substantially all of the soot is converted to slag. The recycling of the collected soot is accomplished by the use of at least one air eductor to provide the motive power for pneumatically recycling the collected soot. During the recycling, the soot must be maintained at a temperature above its dew point, and wetting of the oil soot must be avoided.
Inventors
- 👤 W Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:41
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C22B7/00; C22B7/001; C22B7/04; C22B9/00; C22B9/10; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
A method according to claim 1 wherein the soot is refired until substantially all of the soot is converted to slag.
Claim 2
Dependent Claim
18 words
A method according to claim 2 wherein the primary metal to be recovered from the slag is vanadium.
Claim 3
Dependent Claim
32 words
A method according to claim 1 wherein the motive air supplied to the air eductor is preheated to a degree sufficient to maintain the soot above its dew point during the recycling.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein wetting of the oil soot is avoided.
Claim 5
Dependent Claim
26 words
A method according to claim 2 wheRein the soot is recycled at least twice to a furnace which is used for firing and refiring the soot.
Claim 6
Dependent Claim
19 words
A method according to claim 1 wherein the collected soot is first conveyed to storage means prior to refiring.
Claim 7
Dependent Claim
34 words
A method according to claim 4 wherein the heated air is supplied to the air eductor at a pressure of at least 15 psig and a velocity of at least 3,000 feet per minute.
Claim 8
Dependent Claim
36 words
A method according to claim 1 wherein the collected oil soot is fed to a plurality of air eductors arranged in parallel and provided with a common source of motive air for recycling the collected soot.
References Cited (Backward Citations)
US3579328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |