US3862909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed autogenous combustion and pyrolysis of aqueous effluents to prepare activated carbon
Assignee: Copeland Systems Inc
•
Filing: 1972-09-05
•
Granted: 1975-01-28
•
Expires: 1992-09-05
Abstract
Abstract A pollution controlling aqueous waste treatment method, especially suitable for use in connection with pulp and paper mill operations, by which method waste effluents containing carbonaceous substances are subjected to a controlled oxidation process in a fluid bed reactor to effect autogenous combustion and pyrolysis of carbonaceous substances to activated carbon products suitable for such standard uses as purification and heat generation.
Inventors
- 👤 George G Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/324; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A METHOD FOR TREATING AQUEOUS WASTES CONTAINING ORGANIC CARBONACEOUS MATERIALS, SAID METHOD COMPRISING: INTRODUCING AN AQUEOUS WASTE CONTAINING ORGANIC CARBONACEOUS MATERIALS BY SPRAYING INTO THE FREEBOARD SPACE OF A FLUID BED REACTOR HAVING A PARTICLE BED AND A FREEBOARD SPACE THEREABOVE WHEREIN THE PARTICLES OF SAID BED ARE FLUIDIZED BY A GAS CONTAINING OXYGEN IN SUCH STOICHIOMETRIC AMOUNT AS IS NECESSARY FOR AUTOGENOUS INCOMPLETE COMBUSTION OF THE ORGANIC CARBONACEOUS MATERIALS IN SAID WASTE AT TEMPERATURES OF FROM ABOUT 900* TO ABOUT 2,000*F.; MAINTAINING IN SAID FREEBOARD SPACE A SUBSTANTIALLY OXYGENFREE ATMOSPHERE COMPRISING WATER VAPOR AT A TEMPERATURE OF FROM ABOUT 900* TO 1,200*F. FOR PYROLYSIS OF THE PRODUCTS DERIVED FROM INCOMPLETE COMBUSTION OF CARBONACEOUS MATERIALS IN SAID WASTE TO FORM ACTIVATED CARBON PRODUCTS IN SAID FREEBOARD SPACE; REMOVING A GASEOUS EFFLUENT CONTAINING ACTIVATED CARBON FROM SAID FREEBOARD SPACE; AND SEPARATING AND RECOVERING SAID ACTIVATED CARBON FROM THE GASEOUS EFFLUENT.
Claim 2
Independent Claim
149 words
A METHOD FOR TREATING AQUEOUS WASTES CONTAINING ORGANIC CARBONACEOUS MATERIALS, SAID METHOD COMPRISING: INTRODUCING AN AQUEOUS WASTE CONTAINING ORGANIC CARBONACEOUS MATERIALS BY SPRAYING INTO THE FREEBOARD SPACE OF A FLUID BED REACTOR HAVING A PARTICLE BED AND A FREEBOARD SPACE THEREABOVE WHEREIN THE PARTICLES OF SAID BED ARE FLUIDIZED BY A GAS CONTAINING OXYGEN IN SUCH STOICHIOMETRIC AMOUNT AS IS NECESSARY FOR AUTOGENOUS INCOMPLETE COMBUSTION OF THE ORGANIC CARBONACEOUS MATERIALS IN SAID WASTE AT TEMPERATURES OF FROM ABOUT 900* TO ABOUT 2,000*F.; MAINTAINING IN SAID FREEBOARD SPACE A SUBSTANTIALLY OXYGENFREE ATMOSPHERE COMPRISING WATER VAPOR AT A TEMPERATURE OF FROM ABOUT 900* TO 1,200*F. FOR PYROLYSIS OF THE PRODUCTS DERIVED FROM INCOMPLETE COMBUSTION OF CARBONACEOUS MATERIALS IN SAID WASTE TO FORM ACTIVATED CARBON PRODUCTS IN SAID FREEBOARD SPACE; REMOVING A GASEOUS EFFLUENT CONTAINING ACTIVATED CARBON FROM SAID FREEBOARD SPACE; AND SEPARATING AND RECOVERING SAID ACTIVATED CARBON FROM THE GASEOUS EFFLUENT.
Claim 3
Dependent Claim
38 words
The method of claim 1 further including the step of concentrating said aqueous wastes to a carbonaceous material solids content of from about 30 to about 65 percent by weight prior to introduction into said fluid bed reactor.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said recovering step includes flotation of activated carbon products.
References Cited (Backward Citations)
US1623598A
Cited
US1483160A
Cited
US1634480A
Cited
US2391566A
Cited
US3309262A
Cited
US3296064A
Cited
US3595806A
Cited
US3635790A
Cited
US3701824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |