US3829516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cycloalkylaromatics
Assignee: Phillips Petroleum Co
•
Filing: 1973-02-21
•
Granted: 1974-08-13
•
Expires: 1993-02-21
Abstract
Abstract CYCLOALKYLAROMATICS ARE PRODUCED FROM AROMATIC HYDROCARBONS IN THE PRESENCE OF HYDROGEN AND A RHODIUMACTIVE CLAY CATALYST. PREFERABLY THE CATALYST HAS NOT BEEN HEATED UNDER CALCINATION CONDITIONS PRIOR TO USE. IN A SPECIFIC EMBODIMENT, BENZENE IS CONVERTED TO CYCLOHEXYLBENZENE WITH GOOD SELECTIVITY OVER AN ACTIVE CLAY IMPREGNATED WITH RHODIUM TRICHLORIDE WHEREIN THE SOLVENT HAS BEEN REMOVED UNDER CONDITIONS WHICH DO NOT SUBJECT THE CATALYST COMPOSITION TO CALCINATION TEMPERATURE.
Inventors
- 👤 E Zuech
- 👤 M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/10; C; C07; C07C; C07C2/00; C07C2/74; C07C2521/00; C07C2521/16; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/46; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |