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US3231329A
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Process of recovering tungstic acid catalyst
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1962-08-28
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Granted: 1966-01-25
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Weiss Francis
- 👤 Isard Arsene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:28
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; C07C29/03; C07C29/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR RECOVERING IN A PRECIPITATED STATE, TUNGSTIC ACID FROM A REACTION MIXTURE RESULTING FROM OXIDIZING AN OLEFINIC COMPOUND WITH HYDROGEN PEROXIDE IN THE PRESENCE OF TUNGSTIC ACID IN AN ALKALINE MEDIUM AS A CATALYST, WHICH PROCESS COMPRISES BRINGING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN SUBSTANTIALLY ABOUT AMBIENT AND 100*C. INTO CONTACT WITH A STRONGLY ACIDIC POLYMERIC CATION EXCHANGE RESIN IN ITS ACID FORM TO ELIMINATE THE ALKALINE CATION AND ACIDIFY THE MIXTURE, THEREAFTER HEATING SAID MIXTURE AT A TEMPERATURE HIGHER THAN SAID FIRST MENTIONED TEMPERATURE TO EFFECT PRECIPITATION OF TUNGSTIC ACID AND SEPARATING THE PRECIPITATE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR RECOVERING IN A PRECIPITATED STATE, TUNGSTIC ACID FROM A REACTION MIXTURE RESULTING FROM OXIDIZING AN OLEFINIC COMPOUND WITH HYDROGEN PEROXIDE IN THE PRESENCE OF TUNGSTIC ACID IN AN ALKALINE MEDIUM AS A CATALYST, WHICH PROCESS COMPRISES BRINGING SAID REACTION MIXTURE AT A TEMPERATURE BETWEEN SUBSTANTIALLY ABOUT AMBIENT AND 100*C. INTO CONTACT WITH A STRONGLY ACIDIC POLYMERIC CATION EXCHANGE RESIN IN ITS ACID FORM TO ELIMINATE THE ALKALINE CATION AND ACIDIFY THE MIXTURE, THEREAFTER HEATING SAID MIXTURE AT A TEMPERATURE HIGHER THAN SAID FIRST MENTIONED TEMPERATURE TO EFFECT PRECIPITATION OF TUNGSTIC ACID AND SEPARATING THE PRECIPITATE.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |