US2595516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of tar acids and bases from hydrocarbon oils
Assignee: Union Carbide Corp
•
Filing: 1948-08-11
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Granted: 1952-05-06
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Expires: 1968-08-11
Abstract
No abstract record available.
Inventors
- 👤 Edward W Doughty
- 👤 Jr James V Murray
- 👤 John D Fales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:55
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/14; B; B01; B01D; B01D11/00; B01D11/04; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/72; C10; C10G; C10G19/00; C10G19/02; C10G19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
PROCESS FOR RECOVERING PHENOLS FROM MIXTURES OF HYDROCARBONS AND PHENOLS WHICH COMPRISES EXTRACTING SUCH MIXTURES WITH AN AQUEOUS SOLUTION OF ALKALI-METAL PHENOLATES CONTAINING AT LEAST 20% BY WEIGHT OF SAID PHENOLATES TO FORM A SOLUTION OF FREE PHENOLS IN SAID AQUEOUS SOLUTION, EXTRACTING SAID SOLUTION OF FREE PHENOLS WITH A NEUTRAL, NORMALLY LIQUID ORGANIC SOLVENT, SAID SOLVENT BEING IMMISCIBLE WITH 40% AQUEOUS SODIUM PHENOLATE SOLUTION, CONTAINING NON-TERMINAL OXYGEN ATTACHED ONLY TO CARBON AND BOILING BELOW 180* C., TO FORM A SOLUTION OF THE FREE PHENOLS IN SAID SOLVENT AND TO SEPARATE A WATER SOLUTION OF ALKALI-METAL PHENOLATES, AND RECYCLING SAID WATER SOLUTION OF ALKALI-METAL PHENOLATES TO THE FIRST EXTRACTION STEP.
Claim 2
Dependent Claim
110 words
PROCESS FOR RECOVERING PHENOLS FROM MIXTURES OF HYDROCARBONS AND PHENOLS WHICH COMPRISES EXTRACTING SUCH MIXTURES WITH AN AQUEOUS SOLUTION OF ALKALI-METAL PHENOLATES CONTAINING AT LEAST 20% BY WEIGHT OF SAID PHENOLATES TO FORM A SOLUTION OF FREE PHENOLS IN SAID AQUEOUS SOLUTION, EXTRACTING SAID SOLUTION OF FREE PHENOLS WITH A NEUTRAL, NORMALLY LIQUID ORGANIC SOLVENT, SAID SOLVENT BEING IMMISCIBLE WITH 40% AQUEOUS SODIUM PHENOLATE SOLUTION, CONTAINING NON-TERMINAL OXYGEN ATTACHED ONLY TO CARBON AND BOILING BELOW 180* C., TO FORM A SOLUTION OF THE FREE PHENOLS IN SAID SOLVENT AND TO SEPARATE A WATER SOLUTION OF ALKALI-METAL PHENOLATES, AND RECYCLING SAID WATER SOLUTION OF ALKALI-METAL PHENOLATES TO THE FIRST EXTRACTION STEP.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |