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Patent US3557235A successfully refreshed from Google Patents.
US3557235A
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Production of ethylbenzene and benzene from toluene
Assignee: Union Carbide Corp
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Filing: 1968-12-27
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Granted: 1971-01-19
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Expires: 1988-12-27
Abstract
Abstract ETHYLBENZENE AND BENZENE ARE PRODUCED FROM TOLUENE BY A UNIQUE PROCESS WHICH COMPRISES FIRST COUPLING THE TOLUENE IN THE PRESENCE OF A CATALYST AND IN THE VAPOR PHASE TO PRODUCE BIBENZYL AND STILBENE. THE OXIDATIVELY COUPLED PRODUCTS ARE THEN DILUTED WITH BENZENE AND CATALYTICALLY HYDRODEALKYLATED TO PRODUCE ETHYLBENZENE AND BENZENE AS THE ULTIMATE MAJOR PRODUCTS.
Inventors
- 👤 Joseph Peter Henry
- 👤 Fred Noble Hill
- 👤 Roger Harry Garst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:52
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/067; C07C15/073; C07C15/04; C07C2/00; C07C2/76; C07C2/82; C07C2/84; C07C4/00; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/12; C07C2521/14; C07C2521/16; C07C2523/00; C07C2523/02; C07C2523/06; C07C2523/08; C07C2523/14; C07C2523/16; C07C2523/18; C07C2523/20; C07C2523/22; C07C2523/24; C07C2523/26; C07C2523/30; C07C2527/00; C07C2527/02; C07C2527/057; C07C2527/14; C07C2527/16; C07C2527/167; C07C2529/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |