US2934498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of aromatics with pyridine hydrochloride
Assignee: Standard Oil Co
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Filing: 1957-01-28
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Granted: 1960-04-26
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Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Nevitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:02
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C07; C07C; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE LIQUID-LIQUID SELECTIVE EXTRACTION OF AN AROMATIC HYDROCARBON FROM A HYDROCARBON MIXTURE CONTAINING THE SAME, SAID HYDROCARBON MIXTURE BOILING WITHIN THE GASOLINE RANGE, WHICH PROCESS COMPRISES CONTACTING EACH VOLUME OF SAID MIXTURE IN THE LIQUID PHASE WITH ABOUT 0.5 TO ABOUT 50 VOLUMES OF A SOLVENT CONSISTING OF AN APPROXIMATELY SATURATED SOLUTION OF PYRIDINE HYDROCHLORIDE CONTAINING FROM ABOUT 87.5 TO ABOUT 99% PYRIDINE HYDROCHLORIDE IN WATER, AT A TEMPERATURE BETWEEN ABOUT 0*C. AND 150*C. AND SEPARATING A LIQUID RAFFINATE PHASE FROM A LIQUID EXTRACT PHASE COMPRISING SAID SOLVENT AND SAID AROMATIC HYDROCARBON.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE LIQUID-LIQUID SELECTIVE EXTRACTION OF AN AROMATIC HYDROCARBON FROM A HYDROCARBON MIXTURE CONTAINING THE SAME, SAID HYDROCARBON MIXTURE BOILING WITHIN THE GASOLINE RANGE, WHICH PROCESS COMPRISES CONTACTING EACH VOLUME OF SAID MIXTURE IN THE LIQUID PHASE WITH ABOUT 0.5 TO ABOUT 50 VOLUMES OF A SOLVENT CONSISTING OF AN APPROXIMATELY SATURATED SOLUTION OF PYRIDINE HYDROCHLORIDE CONTAINING FROM ABOUT 87.5 TO ABOUT 99% PYRIDINE HYDROCHLORIDE IN WATER, AT A TEMPERATURE BETWEEN ABOUT 0*C. AND 150*C. AND SEPARATING A LIQUID RAFFINATE PHASE FROM A LIQUID EXTRACT PHASE COMPRISING SAID SOLVENT AND SAID AROMATIC HYDROCARBON.
References Cited (Backward Citations)
US2567228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |