US2648713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of isomeric aromatic compounds
Assignee: Sunoco Inc
•
Filing: 1951-03-22
•
Granted: 1953-08-11
•
Expires: 1971-03-22
Abstract
No abstract record available.
Inventors
- 👤 Schneider Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:41
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14875; C07C7/14883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
PROCESS OF SEPARATING A 1,2-DIALKYL BENZENE FROM AN ADMIXTURE THEREOF WITH A 1,3-DIALKYL BENZENE WHICH IS AN ISOMER OF SAID 1,2-DIALKYL BENZENE WHICH COMPRISES SUBJECTING SAID ADMIXTURE IN LIQUID PHASE TO ALKYLATING CONDITIONS IN CONTACT WITH AN ALKYLATION CATALYST AND A QUANTITY OF AN ALKYLATING AGENT HAVING AT LEAST 1 TERTIARY CARBON ATOM PER MOLECULE SO THAT SAID 1,2DIALKYL BENZENE IS SUBSTANTIALLY ALKYLATED AND SAID 1,3-DIALKYL BENZENE REMAINS SUBSTANTIALLY UNALKYLATED, AND SEPARATING SAID ALKYLATED 1,2DIALKYL BENZENE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
80 words
PROCESS OF SEPARATING A 1,2-DIALKYL BENZENE FROM AN ADMIXTURE THEREOF WITH A 1,3-DIALKYL BENZENE WHICH IS AN ISOMER OF SAID 1,2-DIALKYL BENZENE WHICH COMPRISES SUBJECTING SAID ADMIXTURE IN LIQUID PHASE TO ALKYLATING CONDITIONS IN CONTACT WITH AN ALKYLATION CATALYST AND A QUANTITY OF AN ALKYLATING AGENT HAVING AT LEAST 1 TERTIARY CARBON ATOM PER MOLECULE SO THAT SAID 1,2DIALKYL BENZENE IS SUBSTANTIALLY ALKYLATED AND SAID 1,3-DIALKYL BENZENE REMAINS SUBSTANTIALLY UNALKYLATED, AND SEPARATING SAID ALKYLATED 1,2DIALKYL BENZENE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2425858A
Cited
US2379368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |