US2727010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of titanium-phosphorus catalysts
Assignee: Standard Oil Co
•
Filing: 1952-12-01
•
Granted: 1955-12-13
•
Expires: 1972-12-01
Abstract
No abstract record available.
Inventors
- 👤 Wilford J Zimmerschied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:23
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; B; B01; B01J; B01J27/00; B01J27/28; B01J27/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD FOR RESTORING THE ACTIVITY OF A DEACTIVATED TITANIUM-PHOSPHORUS CATALYST, PREPARED BY HEATING A TITANIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF THE TITANIUM CHLORIDES AND BROMIDES WITH A PHOSPHORIC ACID SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC AND PYROPHOSPHORIC ACIDS AT A TEMPERATURE ABOVE ABOUT 175* C. UNTIL THE EVOLUTION OF HYDROGEN HALIDE THEREFROM SUBSTANTIALLY CEASES, WHICH COMPRISES CONTACTING SAID DEACTIVATED CATALYST WITH HYDROGEN AT A PRESSURE ABOVE ABOUT 500 POUNDS PER SQUARE INCH AND A TEMPERATURE BETWEEN ABOUT 350 AND 500* C. FOR A PERIOD IN EXCESS OF ABOUT 0.5 HOUR.
Claim 2
Independent Claim
94 words
A METHOD FOR RESTORING THE ACTIVITY OF A DEACTIVATED TITANIUM-PHOSPHORUS CATALYST, PREPARED BY HEATING A TITANIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF THE TITANIUM CHLORIDES AND BROMIDES WITH A PHOSPHORIC ACID SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC AND PYROPHOSPHORIC ACIDS AT A TEMPERATURE ABOVE ABOUT 175* C. UNTIL THE EVOLUTION OF HYDROGEN HALIDE THEREFROM SUBSTANTIALLY CEASES, WHICH COMPRISES CONTACTING SAID DEACTIVATED CATALYST WITH HYDROGEN AT A PRESSURE ABOVE ABOUT 500 POUNDS PER SQUARE INCH AND A TEMPERATURE BETWEEN ABOUT 350 AND 500* C. FOR A PERIOD IN EXCESS OF ABOUT 0.5 HOUR.
References Cited (Backward Citations)
US2500776A
Cited
US2487867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |