US3629351A
Expired / Lapsed
US
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Catalytic rearrangement of alkyl aromatics
Assignee: BP PLC
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Filing: 1969-12-16
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Granted: 1971-12-21
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Expires: 1989-12-16
Abstract
Abstract IN THE CATALYTIC REARRANGEMENT OF ALKYL AROMATICS OVER A CATALYST OF A HYDROGENATING COMPONENT OR AN ALKALICATION DEFICIENT ZEOLITE, THE FEEDSTOCK CONTAINS LESS THAN 0.5% WT., PREFERABLY LESS THAN 0.1% WT. OF NON-AROMATIC HYDROCARBONS SO THAT THE CATALYST ACTIVITY IS INCREASED. THE PREFERRD ZEOLITE IS DECATIONISED MORDENITE AND THE PREFERRED HYDROGENATING COMPONENT A GROUP VIII METAL E.G. NICKEL ADDED BY ION-EXCHANGE. THE OPERATING CONDITIONS MAY BE 300-525*C., 0-1500 P.S.I.G., 0.1-10 V./V./HR. 1,000-15,000 S.C.F. H2/B. PARAFFINS WERE FOUND TO BE A PERMANENT AND NAPHTHENES A TEMPORARY POISION FOR THE CATALYST.
Inventors
- 👤 Martin Frederick Olive
- 👤 Geoffrey Dovey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/18; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/942
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |