US3277185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Karl grob
Assignee: —
•
Filing: —
•
Granted: 1966-10-04
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:58
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/02; C07C39/04; C07C37/00; C07C37/68; C07C37/685; C07C37/70; C07C37/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
273 words
IN A PROCESS FOR RECOVERY OF PHENOLS FROM A MIXTURE THEREOF WITH NEUTRAL OILS BY EXTRACTION OF THE MIXTURE WITH AN AQUEOUS ALKALI PHENOLATE SOLUTION OF ABOUT 10-50% CONCENTRATION TO DISSOLVE PHENOLS IN THE AQUEOUS ALKALI PHENOLATE SOLUTION AND THEREBY EXTRACT PHENOLS FROM THE NEUTRAL OIL AND FORM AN AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL, CONTACTING THE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH A LOW BOILING HYDROCARBON SOLVENT TO SEPARATE THEREFROM BY EXTRACTION NEUTRAL OIL RETAINED THEREBY AND PROVIDE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL, CONTACTING THE NEUTRAL OIL-FREE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXYGENCONTAINING ORGANIC SOLVENT TO SEPARATE THREFROM BY EXTRACTION PHENOLS BY DISSOLVING OF PHENOLS IN THE OXYGENCONTAINING SOLVENT AND PROVIDE AQUEOUS ALKALI PHENOLATE SOLUTION DEPLETED IN PHENOL, RECYCLING THE AQUEOUS ALKALI PHENOLATE SOLUTION DEPLETED IN PHENOL TO EXTRACTION OF THE MIXTURE OF PHENOLS AND NEUTRAL OILS, AND SEPARATING PHENOLS FROM THE SOLUTION THEREOF IN THE OXYGEN-CONTAINING ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES SIMULTANEOUSLY EXTRACTING THE SAID MIXTURE WITH THE AQUEOUS ALKALI PHENOLATE SOLUTION AND THE LOW BOILING HYDROCARBON SOLVENT, SAID LOW BOILING HYDROCARBON SOLVENT CONSISTING ESSENTIALLY OF HYDROCARBONS IN THE BOILING RANGE OF ABOUT 75-145*C. AND CONTAINING AT LEAST 25% OF AROMATIC HYDROCARBONS, DISTILLING THE NEUTRAL OIL-FREE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL TO SEPARATE THEREFROM LOW BOILING HYDROCARBON RETAINED THEREBY, AND PRIOR TO THE CONTACTING OF THE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXYGEN-CONTAINING ORGANIC SOLVENT, CONTACTING THE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXIDIZING AGENT FOR OXIDATION OF AMINO PHENOLS AND DIPHENOLS TO HIGH BOILING QUINOIDAL COMPOUNDS.
Claim 2
Dependent Claim
273 words
IN A PROCESS FOR RECOVERY OF PHENOLS FROM A MIXTURE THEREOF WITH NEUTRAL OILS BY EXTRACTION OF THE MIXTURE WITH AN AQUEOUS ALKALI PHENOLATE SOLUTION OF ABOUT 10-50% CONCENTRATION TO DISSOLVE PHENOLS IN THE AQUEOUS ALKALI PHENOLATE SOLUTION AND THEREBY EXTRACT PHENOLS FROM THE NEUTRAL OIL AND FORM AN AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL, CONTACTING THE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH A LOW BOILING HYDROCARBON SOLVENT TO SEPARATE THEREFROM BY EXTRACTION NEUTRAL OIL RETAINED THEREBY AND PROVIDE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL, CONTACTING THE NEUTRAL OIL-FREE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXYGENCONTAINING ORGANIC SOLVENT TO SEPARATE THREFROM BY EXTRACTION PHENOLS BY DISSOLVING OF PHENOLS IN THE OXYGENCONTAINING SOLVENT AND PROVIDE AQUEOUS ALKALI PHENOLATE SOLUTION DEPLETED IN PHENOL, RECYCLING THE AQUEOUS ALKALI PHENOLATE SOLUTION DEPLETED IN PHENOL TO EXTRACTION OF THE MIXTURE OF PHENOLS AND NEUTRAL OILS, AND SEPARATING PHENOLS FROM THE SOLUTION THEREOF IN THE OXYGEN-CONTAINING ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES SIMULTANEOUSLY EXTRACTING THE SAID MIXTURE WITH THE AQUEOUS ALKALI PHENOLATE SOLUTION AND THE LOW BOILING HYDROCARBON SOLVENT, SAID LOW BOILING HYDROCARBON SOLVENT CONSISTING ESSENTIALLY OF HYDROCARBONS IN THE BOILING RANGE OF ABOUT 75-145*C. AND CONTAINING AT LEAST 25% OF AROMATIC HYDROCARBONS, DISTILLING THE NEUTRAL OIL-FREE AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL TO SEPARATE THEREFROM LOW BOILING HYDROCARBON RETAINED THEREBY, AND PRIOR TO THE CONTACTING OF THE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXYGEN-CONTAINING ORGANIC SOLVENT, CONTACTING THE NEUTRAL OIL-FREE, AQUEOUS ALKALI PHENOLATE SOLUTION CONTAINING FREE PHENOL WITH AN OXIDIZING AGENT FOR OXIDATION OF AMINO PHENOLS AND DIPHENOLS TO HIGH BOILING QUINOIDAL COMPOUNDS.
References Cited (Backward Citations)
US2134390A
Cited
US2595516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |