US3226337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a catalyst for the oxidation of olefins and diolefins to unsaturated dicarboxylic acids
Assignee: Hoechst AG
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Filing: 1961-12-12
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Granted: 1965-12-28
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Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 Riemenschneider Wilhelm
- 👤 Pintschovius Ulrich
- 👤 Probst Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF MAKING A CATALYST FOR THE OXIDATION OF AN OLEFIN HAVING FOUR CARBON ATOMS IN A STRAIGHT CHAIN TO AN OLEFINICALLY UNSATURATED ALIPHATIC DICARBOXYLIC ACID, WHICH METHOD COMPRISES REACTING VANDIUM PENTOXIDE WITH AQUEOUS PHOSPHORIC ACID, WHILE MAINTAINING TEMPERATURES BELOW 200*C., IN AMOUNTS CORRESPONDING TO A WEIGHT RATIO OF VANADIUM PENTOXIDE TO PHOSPHORUS PENTOXIDE BETWEEN 1:0.5 AND 1:4 IN SAID CATALYST, AND THEN COMBINING THE REACTION PRODUCT WITH A SOLID INERT CARRIER MATERIAL SELECTED FROM THE GROUP CONSISTING OF KIESELGUHR, PROCELAIN, SILICA GEL, PUMICE, ALUMINUM OXIDE, TITANIUM DIOXIDE, ZIRCONIUM DIOXIDE, AND SILICON CARBIDE.
Claim 2
Independent Claim
94 words
THE METHOD OF MAKING A CATALYST FOR THE OXIDATION OF AN OLEFIN HAVING FOUR CARBON ATOMS IN A STRAIGHT CHAIN TO AN OLEFINICALLY UNSATURATED ALIPHATIC DICARBOXYLIC ACID, WHICH METHOD COMPRISES REACTING VANDIUM PENTOXIDE WITH AQUEOUS PHOSPHORIC ACID, WHILE MAINTAINING TEMPERATURES BELOW 200*C., IN AMOUNTS CORRESPONDING TO A WEIGHT RATIO OF VANADIUM PENTOXIDE TO PHOSPHORUS PENTOXIDE BETWEEN 1:0.5 AND 1:4 IN SAID CATALYST, AND THEN COMBINING THE REACTION PRODUCT WITH A SOLID INERT CARRIER MATERIAL SELECTED FROM THE GROUP CONSISTING OF KIESELGUHR, PROCELAIN, SILICA GEL, PUMICE, ALUMINUM OXIDE, TITANIUM DIOXIDE, ZIRCONIUM DIOXIDE, AND SILICON CARBIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |