US3671403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coking pumpable animal and dairy wastes
Assignee: Texaco Inc
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Filing: 1970-09-09
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Granted: 1972-06-20
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Expires: 1990-09-09
Abstract
Abstract Animal and dairy wastes are converted to deodorized coke suitable for use as fertilizer or soil conditioner, an aqueous odor-free effluent having low chemical oxygen demand and reduced phosphorus content and an odorless gas suitable for discharge to the atmosphere. The wastes are coked in the liquid phase under pressure to produce wet coke and a malodorous, gas-containing effluent high in chemical oxygen demand. The wet coke is treated with pressurized hot air to remove liquids therefrom and the air stream is mixed with the effluent and the mixture is oxidized, brought into heat exchange relationship with incoming wastes and then discharged.
Inventors
- 👤 Howard V Hess
- 👤 Edward L Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:08
CPC Classifications
C; C10; C10B; C10B53/00; C05; C05F; C05F11/00; C05F3/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y02P; Y02P20/00; Y02P20/141; Y02P20/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
The process according to claim 1, wherein said oxidation is carried out at about 550* F. under autogenous pressure.
Claim 2
Dependent Claim
30 words
The process according to claim 1, wherein said pressurized hot air is heated by passage through said heating zone to a temperature of from about 250* F. to 350* F.
Claim 3
Dependent Claim
34 words
The process according to claim 1, wherein said hot air is passed over said wet coke bed at a flow rate sufficient to expand said coke bed and maintain same in an expanded condition.
Claim 4
Dependent Claim
15 words
The process according to claim 1, wherein sufficient air is used to provide excess oxygen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |