Patent US3755486A successfully refreshed from Google Patents.
US3755486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocyclization of hydrocarbons
Assignee: Sun Research and Development Co
•
Filing: 1971-08-26
•
Granted: 1973-08-28
•
Expires: 1991-08-26
Abstract
Abstract PROCESS OF DEHYDROCYCLIZING C6-C10 HYDROCARBONS HAVING AT LEAST A C6 BACKBONE USING A LI,NA OR K ZEOLITE X OR Y OR FAUJASITE IMPREGNATED WITH 0.3 TO 1.4 PERCENT PT AT FROM 500 TO 560*C. AND PREFERABLY 510 TO 550*C. USING A PARTIAL PRESSURE OF H2 OF FROM 10 TO 300 P.S.I. AND PREFERABLY 50 TO 200 P.S.I. TO FORM BENZENE AND ALKYLBENZENES. OPTIONALLY THE CATALYST CAN BE TREATED WITH CHLORINE SO THAT IT CONTAINS FROM 0.3 TO 1.5 WEIGHT PERCENT CHLORINE WHICH IMPROVES THE EFFECTIVESS OF THE CATALYST.
Inventors
- 👤 M Oishi
- 👤 W Butte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; B01J29/12; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |