US3140318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of phenol of high degree of purity
Assignee: Ineos Phenol GmbH
•
Filing: 1960-02-09
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Granted: 1964-07-07
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Expires: 1980-02-09
Abstract
No abstract record available.
Inventors
- 👤 Sodomann Heinrich
- 👤 Hauschulz Bruno
- 👤 Schwermer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:46
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86; C07C37/685; C07C37/70; C07C37/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE PROCESS OF RECOVERING SUBSTANTIALLY PURE PHENOL FROM THE PHENOL REACTION PRODUCT MIXTURE PRODUCED IN THE ACID CLEAVAGE OF A HYDROPEROXIDE OF AN ALKYLAROMATIC HYDROCARBON, THE IMPROVEMENT OF DISTILLING THE SAME, INTIMATELY MIXING THE SEPARATED PHENOL FRACTION WITH BETWEEN 0.05 AND 1% BY WEIGHT BASED ON THE PHENOL MIXTURE OF AN ACID SELECTED FROM THE GROUP CONSISTING OF INORGANIC AND STRONG ORGANIC ACIDS AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70-170*C. FOR A PERIOD OF ABOUT FROM 1-6 HOURS NEUTRALIZING THE ACIDIFIED PHENOL FRACTION, AND THEREAFTER SUBJECTING THE NEUTRALIZED PHENOL FRACTION TO A SECOND DISTILLATION.
Claim 2
Dependent Claim
97 words
IN THE PROCESS OF RECOVERING SUBSTANTIALLY PURE PHENOL FROM THE PHENOL REACTION PRODUCT MIXTURE PRODUCED IN THE ACID CLEAVAGE OF A HYDROPEROXIDE OF AN ALKYLAROMATIC HYDROCARBON, THE IMPROVEMENT OF DISTILLING THE SAME, INTIMATELY MIXING THE SEPARATED PHENOL FRACTION WITH BETWEEN 0.05 AND 1% BY WEIGHT BASED ON THE PHENOL MIXTURE OF AN ACID SELECTED FROM THE GROUP CONSISTING OF INORGANIC AND STRONG ORGANIC ACIDS AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70-170*C. FOR A PERIOD OF ABOUT FROM 1-6 HOURS NEUTRALIZING THE ACIDIFIED PHENOL FRACTION, AND THEREAFTER SUBJECTING THE NEUTRALIZED PHENOL FRACTION TO A SECOND DISTILLATION.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |