US2966529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aromatic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1958-04-28
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Granted: 1960-12-27
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Expires: 1978-04-28
Abstract
No abstract record available.
Inventors
- 👤 Haensel Vladimir
- 👤 George R Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:31
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C15/06; C07C15/04; C07C6/00; C07C6/08; C07C6/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A PROCESS FOR PRODUCING BENZENE AND XYLENE FROM TOLUENE WHICH COMPRISES HYDROGENATING THE TOLUENE TO THE CORRESPONDING C7 NAPHTHENE, DISPROPORTIONATING SAID C7 NAPHTHENE IN THE PRESENCE OF A CATALYTIC COMPOSITE OF A REFRACTORY METAL OXIDE, A PLATINUM GROUP METAL, AND A FRIEDEL-CRAFTS METAL HALIDE AND IN THE PRESENCE OF HYDROGEN AND HYDROGEN HALIDE TO FORM A C6 NAPHTHENE AND A C8 NAPHTHENE, SEPARATING SAID C6 AND C8 NAPHTHENES FROM EACH OTHER AND SEPARATELY DEHYDROGENATING THEM TO BENZENE AND XYLENE, RESPECTIVELY, AND RECOVERING THE BENZENE AND XYLENE THUS PRODUCED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |