US2955920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decarbonization of spent acids
Assignee: Millennium Petrochemicals Inc
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Filing: 1955-10-14
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Granted: 1960-10-11
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Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
- 👤 Belchetz Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:33
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR DECARBONIZING A SPENT SULFURIC ACID CONTAINING CARBONACEOUS MATTER AND ABOUT 80 TO 90% SULFURIC ACID WHICH COMPRISES CONTACTING SAID ACID, CONTAINING FROM ABOUT 3 TO ABOUT 10 WEIGHT PERCENT OF DISSOLVED DINITROGEN TRIOXIDE, AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 300*F. WITH AIR IN AMOUNT OT MAINTAIN AN EXCESS OF FREE OXYGEN AND SULFUR DIOXIDE TO DISSOLVE SUFFICIENT OXYGEN AND SULFUR DIOXIDE IN SAID ACID SOLUTION WHEREBY CARBONACEOUS MATTER IN SAID SOLUTION IS OXIDIZED TO CARBON DIOXIDE AND WATER AND SIMULTANEOUSLY DISSOLVED SULFUR DIOXIDE IS OXIDIZED TO REACT WITH WATER IN THE SOLUTION AND FORMM SULFURIC ACID IN AN AMOUNT SUFFICIENT TO
Claim 2
Dependent Claim
107 words
A PROCESS FOR DECARBONIZING A SPENT SULFURIC ACID CONTAINING CARBONACEOUS MATTER AND ABOUT 80 TO 90% SULFURIC ACID WHICH COMPRISES CONTACTING SAID ACID, CONTAINING FROM ABOUT 3 TO ABOUT 10 WEIGHT PERCENT OF DISSOLVED DINITROGEN TRIOXIDE, AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 300*F. WITH AIR IN AMOUNT OT MAINTAIN AN EXCESS OF FREE OXYGEN AND SULFUR DIOXIDE TO DISSOLVE SUFFICIENT OXYGEN AND SULFUR DIOXIDE IN SAID ACID SOLUTION WHEREBY CARBONACEOUS MATTER IN SAID SOLUTION IS OXIDIZED TO CARBON DIOXIDE AND WATER AND SIMULTANEOUSLY DISSOLVED SULFUR DIOXIDE IS OXIDIZED TO REACT WITH WATER IN THE SOLUTION AND FORMM SULFURIC ACID IN AN AMOUNT SUFFICIENT TO
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |