US2869986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of tungstic catalysts
Assignee: Shell Development Co
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Filing: 1955-03-31
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Granted: 1959-01-20
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Anderson
- 👤 Foster Elton Gordon
- 👤 Charles M Gable
- 👤 George C Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:28
CPC Classifications
C; C01; C01G; C01G41/00; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/30; B01J23/90; B01J23/92; C07; C07C; C07C29/00; C07C29/48; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A PROCESS FOR RECOVERING TUNGSTIC COMPOUND FROM AQUEOUS SOLUTIONS OF ORGANIC COMPOUNDS CONTAINING THE SAME WHICH COMPRISES INTIMATELY CONTACTING SAID MIXTURE CONTAINING SAID TUNGSTIC COMPOUND IN A DISSOLVED STATE AT A PH NOT GREATER THAN 3 WITH PREFORMED ADSORPTIVE ALUMINA TO ADSORB SAID DISSOLVED TINGSTIC COMPOUND ON THE ALUMINA, SEPARATING THE RESULTING TUNGSTIC COMPOUNDCONTAINING ALUMINA FROM THE AQUEOUS SOLUTION OF ORGANIC COMPOUND AND EXTRACTING THE ADSORBED TUNGSTIC COMPOUND FROM THE ALUMINA.
Claim 2
Dependent Claim
71 words
A PROCESS FOR RECOVERING TUNGSTIC COMPOUND FROM AQUEOUS SOLUTIONS OF ORGANIC COMPOUNDS CONTAINING THE SAME WHICH COMPRISES INTIMATELY CONTACTING SAID MIXTURE CONTAINING SAID TUNGSTIC COMPOUND IN A DISSOLVED STATE AT A PH NOT GREATER THAN 3 WITH PREFORMED ADSORPTIVE ALUMINA TO ADSORB SAID DISSOLVED TINGSTIC COMPOUND ON THE ALUMINA, SEPARATING THE RESULTING TUNGSTIC COMPOUNDCONTAINING ALUMINA FROM THE AQUEOUS SOLUTION OF ORGANIC COMPOUND AND EXTRACTING THE ADSORBED TUNGSTIC COMPOUND FROM THE ALUMINA.
Claim 3
Dependent Claim
125 words
A PROCESS FOR RECOVERING CATALYST FROM THE PRODUCTS OF TUNGSTIC ACID-CATALYZED OXIDATION OF AN ORGANIC COMPOUND CONTAINING TUNGSTIC ACID IN COLLOIDAL FORM TOGETHER WITH DISSOLVED TUNGSTIC ACID WHICH COMPRISES REMOVING THE UNDISSOLVED TUNGSTIC ACID FROM THE MIXTURE BY CENTRIFUGING THE MIXTURE AFTER AGGLOMERATION OF THE COLLOIDAL TUNGSTIC ACID, PASSING THE REMAINING MIXTURE CONTAINING DISSOLVED TUNGSTIC ACID AND ORGANIC OXIDATION PRODUCT AT A PH OF ABOUT 1 TO 3 THROUGH A BED OF GRANULAR ADSORPTIVE ALUMINA TO ADSORB SAID DISSOLVED TUNGSTIC ACID ON SAID ALUMINA, WASHING THE ALUMINA WITH A SOLVENT FOR THE OXIDATION PRODUCT, EXTRACTING ADSORBED TUNGSTIC ACID FROM THE ALUMINA WITH AN AQUEOUS SOLUTION OF A BASE, WATER-WASHING THE ALUMINA AND AGAIN CONTACTING IT WITH TUNGSTIC ACID-CONTAINING MIXTURE TO ADSORB FURTHER AMOUNTS OF CATALYST.
Claim 4
Dependent Claim
125 words
A PROCESS FOR RECOVERING CATALYST FROM THE PRODUCTS OF TUNGSTIC ACID-CATALYZED OXIDATION OF AN ORGANIC COMPOUND CONTAINING TUNGSTIC ACID IN COLLOIDAL FORM TOGETHER WITH DISSOLVED TUNGSTIC ACID WHICH COMPRISES REMOVING THE UNDISSOLVED TUNGSTIC ACID FROM THE MIXTURE BY CENTRIFUGING THE MIXTURE AFTER AGGLOMERATION OF THE COLLOIDAL TUNGSTIC ACID, PASSING THE REMAINING MIXTURE CONTAINING DISSOLVED TUNGSTIC ACID AND ORGANIC OXIDATION PRODUCT AT A PH OF ABOUT 1 TO 3 THROUGH A BED OF GRANULAR ADSORPTIVE ALUMINA TO ADSORB SAID DISSOLVED TUNGSTIC ACID ON SAID ALUMINA, WASHING THE ALUMINA WITH A SOLVENT FOR THE OXIDATION PRODUCT, EXTRACTING ADSORBED TUNGSTIC ACID FROM THE ALUMINA WITH AN AQUEOUS SOLUTION OF A BASE, WATER-WASHING THE ALUMINA AND AGAIN CONTACTING IT WITH TUNGSTIC ACID-CONTAINING MIXTURE TO ADSORB FURTHER AMOUNTS OF CATALYST.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |