Patent US3084994A successfully refreshed from Google Patents.
US3084994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
method for recovery of selenium from a
Assignee: —
•
Filing: —
•
Granted: 1963-04-09
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Expires: 1980-04-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:00
CPC Classifications
C; C01; C01B; C01B19/00; C01B19/02; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD FOR RECOVERING SELENIUM FROM A GAS CONTAINING SELENIUM TOGETHER WITH ALDEHYDE AND NITRILE PRODUCED FROM THE OXIDATION OF UNSATURATED HYDROCARBONS, COMPRISING (1) SPRAYING WATER INTO A STREAM OF THE GAS TO COLLECT THE SELENIUM, THE WATER HAVING A PH OF 7 TO 9 AND A TEMPERATURE BELOW 50* C., (2) SEPARATING THE RESULTANT SELENIUM-CONTAINING WATER FROM THE RESULTANT GAS-LIQUID MIXTURE IN A GAS-LIQUID SEPARATION ZONE, (3) ATOMIZING THE SELENIUM-CONTAINING WATER IN MOLECULAR OXYGEN-CONTAINING GAS, (4) CONTACTING THE RESULTANT ATOMIZED MIXTURE WITH OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, IRON AND NICKEL AT A TEMPERATURE OF MINIMALLY 500* C. WHEREBY SELENIUM IS OXIDIZED TO SELENIUM DIOXIDE, AND (5) CONDENSING THE RESULTANT GASEOUS SELENIUM DIOXIDEWATER MIXTURE BY COOLING.
Claim 2
Independent Claim
122 words
A METHOD FOR RECOVERING SELENIUM FROM A GAS CONTAINING SELENIUM TOGETHER WITH ALDEHYDE AND NITRILE PRODUCED FROM THE OXIDATION OF UNSATURATED HYDROCARBONS, COMPRISING (1) SPRAYING WATER INTO A STREAM OF THE GAS TO COLLECT THE SELENIUM, THE WATER HAVING A PH OF 7 TO 9 AND A TEMPERATURE BELOW 50* C., (2) SEPARATING THE RESULTANT SELENIUM-CONTAINING WATER FROM THE RESULTANT GAS-LIQUID MIXTURE IN A GAS-LIQUID SEPARATION ZONE, (3) ATOMIZING THE SELENIUM-CONTAINING WATER IN MOLECULAR OXYGEN-CONTAINING GAS, (4) CONTACTING THE RESULTANT ATOMIZED MIXTURE WITH OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, IRON AND NICKEL AT A TEMPERATURE OF MINIMALLY 500* C. WHEREBY SELENIUM IS OXIDIZED TO SELENIUM DIOXIDE, AND (5) CONDENSING THE RESULTANT GASEOUS SELENIUM DIOXIDEWATER MIXTURE BY COOLING.
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) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |