Patent US3341470A successfully refreshed from Google Patents.
US3341470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: Standard Oil Co
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Filing: 1963-02-27
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Granted: 1967-09-12
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Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert L Hensley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/70; B01J2531/72; B01J2531/80; B01J2531/84; B01J2531/845; B01J27/00; B01J27/20; B01J27/232; B01J31/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A PROCESS FOR RECOVERING AND RECYCLING CATALYST, SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE CATALYSTS AND MIXTURES THEREOF, USED IN A LIQUID PHASE MOLECULAR OXYGEN OXIDATION PROCESS, WHREIN SAID CATALYST CONTAINS MINOR, BUT OXIDATION-INHIBITING, AMOUNTS OF A CONTAMINANT METAL FROM THE GROUP CONSISTING OF IRON, CHROMIUM, COPPER AND MIXTURES THEREOF, SAID PROCESS COMPRISING: (A) OXIDIZING SAID CONTAMINATED CATALYST BY INCINERATION, (B) DISSOLVING SAID OXIDIZED CATALYST WITH SULFURIC ACID, (C) TREATING THE RESULTING ACIDIC SOLUTION WITH CALCIUM HYDROXIDE TO NEUTRALIZE SULFURIC ACID, UNTIL THE ACIDIC SOLUTION HAS A PH OF ABOUT 4, (D) BUFFERING THE CALCIUM HYDROXIDE TREATED SOLUTION WITH CALCIUM CARBONATE AND PRECIPITATING A CONTAMINANT METAL OXIDE, (E) SEPARATING SAID OXIDE FROM THE SOLUTION, (F) INTRODUCING SODIUM CARBONATE TO THE SOLUTION AND PRECIPITATING A CARBONATE OF THE CATALYST, FREE FROM INHIBITING METALS, (G) CONVERTING THE CATALYST CARBONATE TO A CARBOXYLATE SLAT BY TREATMENT WITH AN ORGANIC ACID, AND (H) REINTRODUCING THE CATALYST TO THE OXIDATION PROCESS.
Claim 2
Dependent Claim
158 words
A PROCESS FOR RECOVERING AND RECYCLING CATALYST, SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE CATALYSTS AND MIXTURES THEREOF, USED IN A LIQUID PHASE MOLECULAR OXYGEN OXIDATION PROCESS, WHREIN SAID CATALYST CONTAINS MINOR, BUT OXIDATION-INHIBITING, AMOUNTS OF A CONTAMINANT METAL FROM THE GROUP CONSISTING OF IRON, CHROMIUM, COPPER AND MIXTURES THEREOF, SAID PROCESS COMPRISING: (A) OXIDIZING SAID CONTAMINATED CATALYST BY INCINERATION, (B) DISSOLVING SAID OXIDIZED CATALYST WITH SULFURIC ACID, (C) TREATING THE RESULTING ACIDIC SOLUTION WITH CALCIUM HYDROXIDE TO NEUTRALIZE SULFURIC ACID, UNTIL THE ACIDIC SOLUTION HAS A PH OF ABOUT 4, (D) BUFFERING THE CALCIUM HYDROXIDE TREATED SOLUTION WITH CALCIUM CARBONATE AND PRECIPITATING A CONTAMINANT METAL OXIDE, (E) SEPARATING SAID OXIDE FROM THE SOLUTION, (F) INTRODUCING SODIUM CARBONATE TO THE SOLUTION AND PRECIPITATING A CARBONATE OF THE CATALYST, FREE FROM INHIBITING METALS, (G) CONVERTING THE CATALYST CARBONATE TO A CARBOXYLATE SLAT BY TREATMENT WITH AN ORGANIC ACID, AND (H) REINTRODUCING THE CATALYST TO THE OXIDATION PROCESS.
References Cited (Backward Citations)
US2381659A
Cited
US3105851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |