US2964559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of oxidation catalysts
Assignee: Standard Oil Co
•
Filing: 1957-11-12
•
Granted: 1960-12-13
•
Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 Donald E Burney
- 👤 Hsiang P Liao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:47
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; B01J31/02; B01J31/04; B01J8/00; B01J8/18; B01J8/20; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/70; B01J2531/72; B01J2531/80; B01J2531/84; B01J2531/845; B01J27/00; B01J27/06; B01J27/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR RECOVERING AND RECYCLING HEAVY METAL OXIDATION CATALYST FROM A DISTILLATION BOTTOMS CONTAINING SAID HEAVY METAL OXIDATION CATALYST AND TAR-LIKE OXIDATION INHIBITING BY-PRODUCTS, THE SAID DISTILLATION BOTTOMS BEING DERIVED BY DISTILLATION FROM AT LEAST A PORTION OF THE REACTION MIXTURE FROM THE CATALYTIC LIQUID PHASE OXIDATION OF AN ALIPHATIC SUBSTITUTED AROMATIC COMPOUND WITH MOLECULAR OXYGEN IN THE PRESENCE OF SAID HEAVY METAL OXIDATION CATALYST AND BROMINE,SAID PROCESS COMPRISING THE STEPS OF: EXTRACTING THE HEAVY METAL OXIDATION CATALYST FROM THE DISTILLATION BOTTOMS FRACTION AT A TEMPERATURE BETWEEN ABOUT 50 AND 150*C. WITH BETWEEN ABOUT 3 TO ABOUT 50 VOLUMES PER VOLUME OF DISTILLATION BOTTOMS OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER LOWER SATURATED MONOCARBOXYLIC ACIDS, AND MIXTURES THEREOF, AND RECYCLING AT LEAST A PORTION OF THE OXIDATION CATALYST THUS EXTRACTED TO THE LIQUID PHASE OXIDATION.
Claim 2
Dependent Claim
139 words
A PROCESS FOR RECOVERING AND RECYCLING HEAVY METAL OXIDATION CATALYST FROM A DISTILLATION BOTTOMS CONTAINING SAID HEAVY METAL OXIDATION CATALYST AND TAR-LIKE OXIDATION INHIBITING BY-PRODUCTS, THE SAID DISTILLATION BOTTOMS BEING DERIVED BY DISTILLATION FROM AT LEAST A PORTION OF THE REACTION MIXTURE FROM THE CATALYTIC LIQUID PHASE OXIDATION OF AN ALIPHATIC SUBSTITUTED AROMATIC COMPOUND WITH MOLECULAR OXYGEN IN THE PRESENCE OF SAID HEAVY METAL OXIDATION CATALYST AND BROMINE,SAID PROCESS COMPRISING THE STEPS OF: EXTRACTING THE HEAVY METAL OXIDATION CATALYST FROM THE DISTILLATION BOTTOMS FRACTION AT A TEMPERATURE BETWEEN ABOUT 50 AND 150*C. WITH BETWEEN ABOUT 3 TO ABOUT 50 VOLUMES PER VOLUME OF DISTILLATION BOTTOMS OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER LOWER SATURATED MONOCARBOXYLIC ACIDS, AND MIXTURES THEREOF, AND RECYCLING AT LEAST A PORTION OF THE OXIDATION CATALYST THUS EXTRACTED TO THE LIQUID PHASE OXIDATION.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |