US2734930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ethylbenzene from crude
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
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Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:45
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14875; C07C7/14883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF REMOVING ETHYLBENZENE FROM A CRUDE XYLENE FRACTION CONTAINING ETHYLBENZENE, WHICH CONTACTING SELECTIVELYL ALKYLATING THE ETHYLBENZENE BY CONTACTING THE CRUDE XYLENE FRACTION WITH A QUANTITY OF A MATERIAL OF THE GROUP CONSISTING OF TERTIARY-ALKYLATING AGENTS, TERTIARY-ALKYLBENZENES, TERTIAY-ALKYLTOLUENES AND TERTIARY-ALKYLXYLENES SUFFICIENT TO SELECTIVELY ALKYLATE THE MAJOR PROPORTION OF THE ETHYLBENZENE IN SAID FRACTION IN THE PRESENCE OF AN ALKYLATION CATALYST UNDER ALKYLATING CONDITIONS AND FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPEARATE AN OVERHEAD FRACTION COMPRISING UNREACTED XYLENES AND CHARACTERIZED BY PROPORTION OF ETHYLBENZENE LESSER THAN THE PROPORTION OF ETHYLBENZENE IN THE CRUDE XYLENE FRACTION AND A BOTTOMS FRACTION RICH IN TERTIARY-ALKYLETHYLBENZENE.
Claim 2
Independent Claim
102 words
THE METHOD OF REMOVING ETHYLBENZENE FROM A CRUDE XYLENE FRACTION CONTAINING ETHYLBENZENE, WHICH CONTACTING SELECTIVELYL ALKYLATING THE ETHYLBENZENE BY CONTACTING THE CRUDE XYLENE FRACTION WITH A QUANTITY OF A MATERIAL OF THE GROUP CONSISTING OF TERTIARY-ALKYLATING AGENTS, TERTIARY-ALKYLBENZENES, TERTIAY-ALKYLTOLUENES AND TERTIARY-ALKYLXYLENES SUFFICIENT TO SELECTIVELY ALKYLATE THE MAJOR PROPORTION OF THE ETHYLBENZENE IN SAID FRACTION IN THE PRESENCE OF AN ALKYLATION CATALYST UNDER ALKYLATING CONDITIONS AND FRACTIONALLY DISTILLING THE REACTION PRODUCT TO SEPEARATE AN OVERHEAD FRACTION COMPRISING UNREACTED XYLENES AND CHARACTERIZED BY PROPORTION OF ETHYLBENZENE LESSER THAN THE PROPORTION OF ETHYLBENZENE IN THE CRUDE XYLENE FRACTION AND A BOTTOMS FRACTION RICH IN TERTIARY-ALKYLETHYLBENZENE.
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) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |