US3830853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the simultaneous production of styrene,ethyl benzene,phenol,cresols and benzene
Assignee: Individual
•
Filing: 1971-04-21
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Granted: 1974-08-20
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Expires: 1991-04-21
Abstract
Abstract A PROCESS FOR THE SIMULTANEOUS PRODUCTION OF STYRENE, ETHYL BENZENE, PHENOL, CRESOLS AND BENZENE COMPRISING AN INTERACTION OF TOLLUENE WITH A LOWER PARAFFIN HYDROCARBON AT A TEMPERATURE OF 600 900*C. AND A SPACE VELOCITY OF 2000-1000 HOUR-1 IN THE PRESENCE OF AN INITIATING REAGENT, E.G. OXYGEN OR AN OXYGEN-CONTAINING GAS. THE OXYGEN CONTENT IN THE STARTING MIXTURE IS FROM 1 TO 30 PERCENT BY COLUME. THE MOLAR RATIO OF THE TOLUENE TO THE LOWER PARAFFIN HYDROCARBON IS FROM 2:1 TO 1:20.
Inventors
- 👤 O Revenko
- 👤 A Borisoglebskaya
- 👤 D Fishman
- 👤 K Khcheian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/58; C07C2/00; C07C2/76; C07C2/82; C07C37/50; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/16
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |