Patent US3775502A successfully refreshed from Google Patents.
US3775502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocyclization of paraffins
Assignee: Sun Research and Development Co
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Filing: 1972-05-08
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Granted: 1973-11-27
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Expires: 1992-05-08
Abstract
Abstract PROCESS OF DEHYDROCYCLIZING C6-C10 PARAFFINS USING A SODIUM ZEOLITE X OR SODIUM ZEOLITE Y, WHICH ZEOLITE HAS BEEN ION EXCHARGED WITH FROM 0.10 TO 1.2 WEIGHT PERCENT PLATINUM, THE CATALYST CALCINED AND THE PLATINUM THEN REDUCED WITH HYDROGEN TO THE FREE METAL. IN AN ESPECIALLY PREFERRED ASPECT OF THE INVENTION, THE CATALYST IS GIVEN A FINAL ION EXCHANGE WITH A SODIUM SALT SUCH AS SODIUM BICARBONATE. THE DEHYDROCYCLIZATION REACTION IS CARRIED OUT AT FROM 500-560*C. AND PREFERABLY FROM 510 TO 555*C. USING A PARTIAL PRESSURE OF HYDROGEN OF FROM 10 TO 300 P.S.I.G. AND PREFERABLY 50 TO 200 P.S.I.G. TO FORM BENZENE AND ALKYLBENZENES.
Inventors
- 👤 M Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
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
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |