US2728802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic alkylation process
Assignee: Ethyl Corp
•
Filing: 1952-04-29
•
Granted: 1955-12-27
•
Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Rex D Closson
- 👤 Alfred J Kolka
- 👤 Waldo B Ligett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:45
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/72; C07C2531/00; C07C2531/02; C07C2531/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A PROCESS OF ALKYLATING WITH A STOICHIOMETRIC EXCESS OF A NON-CONJUGATED OLEFIN A HYDROGEN-BEARING SATURATED CARBON ATOM, ALPHA TO A DOUBLY BONDED NUCLEAR CARBON IN A CARBOCYCLIC COMPOUND, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID PROCESS AT A TEMPERATURE BETWEEN 0* C. AND 350* C. FOR A REACTION TIME BETWEEN ABOUT 20 MINUTES AND ABOUT 4.5 HOURS AND UNDER A PRESURE BETWEEN ABOUT 6.6 AND 55 ATMOSPHERES, SAID CARBOCYCLIC COMPOUND AND SAID OLEFIN BEING SUBSTANTIALLY UNDILUTED WITH UNREACTIVE MATERIALS BEING AND HAVING AN OXYGEN CONTENT BELOW ABOUT 0.5 PER CENT, IN THE PRESENCE OF A HYDROCARBO-ALKALI METAL CATALYSTH WHOSE ALKALI METAL HAS AN ATOMIC WEIGHT GREATER THAN 7 AND IN AMOUNT BETWEEN ABOUT 0.01 AND ABOUT 10 PERCENT BY WEIGHT OF SAID CARBOCYCLIC COMPOUND, N AN INITIAL REACTION MEDIUM CONSISTING ESSENTIALLY OF SAID CARBOCYCLIC COMPOUND, SAID OLEFIN AND SAID CATALYST.
Claim 2
Dependent Claim
140 words
IN A PROCESS OF ALKYLATING WITH A STOICHIOMETRIC EXCESS OF A NON-CONJUGATED OLEFIN A HYDROGEN-BEARING SATURATED CARBON ATOM, ALPHA TO A DOUBLY BONDED NUCLEAR CARBON IN A CARBOCYCLIC COMPOUND, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID PROCESS AT A TEMPERATURE BETWEEN 0* C. AND 350* C. FOR A REACTION TIME BETWEEN ABOUT 20 MINUTES AND ABOUT 4.5 HOURS AND UNDER A PRESURE BETWEEN ABOUT 6.6 AND 55 ATMOSPHERES, SAID CARBOCYCLIC COMPOUND AND SAID OLEFIN BEING SUBSTANTIALLY UNDILUTED WITH UNREACTIVE MATERIALS BEING AND HAVING AN OXYGEN CONTENT BELOW ABOUT 0.5 PER CENT, IN THE PRESENCE OF A HYDROCARBO-ALKALI METAL CATALYSTH WHOSE ALKALI METAL HAS AN ATOMIC WEIGHT GREATER THAN 7 AND IN AMOUNT BETWEEN ABOUT 0.01 AND ABOUT 10 PERCENT BY WEIGHT OF SAID CARBOCYCLIC COMPOUND, N AN INITIAL REACTION MEDIUM CONSISTING ESSENTIALLY OF SAID CARBOCYCLIC COMPOUND, SAID OLEFIN AND SAID CATALYST.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |