Patent US2532031A successfully refreshed from Google Patents.
US2532031A
Expired / Lapsed
US
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Separation of c8h10 aromatic hydrocarbons by extractive distillation
Assignee: Shell Development Co
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Filing: 1948-04-06
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Granted: 1950-11-28
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Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alan C Nixon
- 👤 Jr Carl H Deal
- 👤 Roy J Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:03
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS OF SEPARATING ETHYL BENZENE FROM A MIXTURE OF ISOMERIC AROMATIC HYDROCARBONS HAVING THE EMPIRICAL FORMULA C8H10, WHICH PROCESS COMPRISES EXTRACTIVELY DISTILLING SAID MIXTURE IN CONTACT WITH A LIQUID PHASE CONSISTING ESSENTIALLY OF ANTIMONY TRICHLORIDE AS SELECTIVE SOLVENT, THEREBY PRODUCING A DISTILLATE PORTION WHICH IS SUBSTANTIALLY ENRICHED IN ETHYL BENZENE AND AN EXTRACT PORTION WHICH IS SUBSTANTIALLY ENRICHED IN XYLENES AND RECOVERING THE XYLENES FROM SAID EXTRACT PORTION.
Claim 2
Dependent Claim
69 words
A PROCESS OF SEPARATING ETHYL BENZENE FROM A MIXTURE OF ISOMERIC AROMATIC HYDROCARBONS HAVING THE EMPIRICAL FORMULA C8H10, WHICH PROCESS COMPRISES EXTRACTIVELY DISTILLING SAID MIXTURE IN CONTACT WITH A LIQUID PHASE CONSISTING ESSENTIALLY OF ANTIMONY TRICHLORIDE AS SELECTIVE SOLVENT, THEREBY PRODUCING A DISTILLATE PORTION WHICH IS SUBSTANTIALLY ENRICHED IN ETHYL BENZENE AND AN EXTRACT PORTION WHICH IS SUBSTANTIALLY ENRICHED IN XYLENES AND RECOVERING THE XYLENES FROM SAID EXTRACT PORTION.
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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |