US3036882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the after-carbonization of alkali-containing phenol oils
Assignee: Leuna Werke GmbH
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Filing: 1959-10-29
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Granted: 1962-05-29
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Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Bemmann Rudolf
- 👤 Horingklee Walter
- 👤 Buchner Reinhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:52
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE TREATMENT OF ALKALI-CONTAINING PHENOL OIL WITH CARBON DIOXIDE FOR THE RECOVERY OF PHENOL FREE OF ALKALI, THE STEPS OF FIRST TREATING SAID PHENOL OIL WITH CARBON DIOXIDE TO AN EXTENT THAT SUBSTANTIALLY SODIUM CARBONATE WILL BE OBTAINED, SEPARATING THE PHENOL OIL FROM SAID CARBONATE, AND THEREAFTER AGAIN TREATING THE PHENOL OIL WITH CARBON DIOXIDE FOR AFTER-CARBONIZATION WITH SUBSTANTIAL FORMATION OF SODIUM BICARBONATE, SAID AFTER-CARBONIZATION BEING PERFORMED BY PASSING SAID PHENOL OIL AND SAID CARBON DIOXIDE SIMULTANEOUSLY AND CONCURRENTLY THROUGH AN ELONGATED REACTION ZONE MAINTAINED AT A TEMPERATURE RANGING FROM 30 TO 50*C., WHEREBY SUBSTANTIALLY ALKALI-FREE PHENOL IS OBTAINED.
Claim 2
Dependent Claim
100 words
IN THE TREATMENT OF ALKALI-CONTAINING PHENOL OIL WITH CARBON DIOXIDE FOR THE RECOVERY OF PHENOL FREE OF ALKALI, THE STEPS OF FIRST TREATING SAID PHENOL OIL WITH CARBON DIOXIDE TO AN EXTENT THAT SUBSTANTIALLY SODIUM CARBONATE WILL BE OBTAINED, SEPARATING THE PHENOL OIL FROM SAID CARBONATE, AND THEREAFTER AGAIN TREATING THE PHENOL OIL WITH CARBON DIOXIDE FOR AFTER-CARBONIZATION WITH SUBSTANTIAL FORMATION OF SODIUM BICARBONATE, SAID AFTER-CARBONIZATION BEING PERFORMED BY PASSING SAID PHENOL OIL AND SAID CARBON DIOXIDE SIMULTANEOUSLY AND CONCURRENTLY THROUGH AN ELONGATED REACTION ZONE MAINTAINED AT A TEMPERATURE RANGING FROM 30 TO 50*C., WHEREBY SUBSTANTIALLY ALKALI-FREE PHENOL IS OBTAINED.
References Cited (Backward Citations)
US1986320A
Cited
US2134547A
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US2137587A
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US2424158A
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US2550814A
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US2597497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |