US2885444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of 2, 4-di-tertiary-alkyl-phenols with oxygen
Assignee: Dow Chemical Co
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Filing: 1958-03-05
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Granted: 1959-05-05
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Expires: 1978-03-05
Abstract
No abstract record available.
Inventors
- 👤 Fookes James Hiram
- 👤 Pelton Earl Lyman
- 👤 Jr Merton Wayne Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:32
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD OF MAKING A 4,4'',6,6''-TETRA-TERTIARY-ALKYLO,O''-BIPHENOL WHICH METHOD COMPRISES REACTING A MIXTURE OF AN AQUEOUS SOLUTION CONTAINING BETWEEN 5 AND 1200 G. OF AT LEAST ONE ALKALI METAL HYDROXIDE PER KILOGRAM OF WATER AND A 2,4-DI-TERTIARY-ALKYLPHENOL OF THE GROUP CONSISTING OF 2,4-DI-TERTIARY-BUTYLPHENOL AND 2,4DI-TERTIARY-AMYLPHENOL IN PROPORTIONS RANGING BETWEEN THOSE WHICH FORM A THICK, COHESIVE PASTE WHICH CAN BE MIXED WITHOUT CRUMBLING AND THOSE HAVING A PROPORTION OF LESS THAN ONE MOLE OF SAID 2,4-DI-TERTIARY-ALKYLPHENOL PER KILOGRAM OF WATER CONTAINING BETWEEN 5 AND 1200 G. OF AT LEAST ONE ALKALI METAL HYDROXIDE WHILE CONTACTING SAID MIXTURE WITH AN OXYGEN-CONTAINING GAS IN AMOUNT SUFFICIENT TO OXIDIZE THE 2,-4-DI-TERTIARY-ALKYLPHENOL TO THE CORRESPONDING 4,4'',6,6'' - TETRA-TERTIARY-ALKTL-O,O''-BIPHENOL AT A REACTION TEMPERATURE BETWEEN ABOUT 20* AND 300* C. AND AT A REACTION PRESSURE SUBSTANTIALLY ATMOSPHERIC AND ABOUT 1250 P.S.I.G. AND RECOVERING SAID 4,4'',6,6''-TETRA-TERTIARY-ALKYL-O,O''-BIPHENOL.
Claim 2
Independent Claim
137 words
A METHOD OF MAKING A 4,4'',6,6''-TETRA-TERTIARY-ALKYLO,O''-BIPHENOL WHICH METHOD COMPRISES REACTING A MIXTURE OF AN AQUEOUS SOLUTION CONTAINING BETWEEN 5 AND 1200 G. OF AT LEAST ONE ALKALI METAL HYDROXIDE PER KILOGRAM OF WATER AND A 2,4-DI-TERTIARY-ALKYLPHENOL OF THE GROUP CONSISTING OF 2,4-DI-TERTIARY-BUTYLPHENOL AND 2,4DI-TERTIARY-AMYLPHENOL IN PROPORTIONS RANGING BETWEEN THOSE WHICH FORM A THICK, COHESIVE PASTE WHICH CAN BE MIXED WITHOUT CRUMBLING AND THOSE HAVING A PROPORTION OF LESS THAN ONE MOLE OF SAID 2,4-DI-TERTIARY-ALKYLPHENOL PER KILOGRAM OF WATER CONTAINING BETWEEN 5 AND 1200 G. OF AT LEAST ONE ALKALI METAL HYDROXIDE WHILE CONTACTING SAID MIXTURE WITH AN OXYGEN-CONTAINING GAS IN AMOUNT SUFFICIENT TO OXIDIZE THE 2,-4-DI-TERTIARY-ALKYLPHENOL TO THE CORRESPONDING 4,4'',6,6'' - TETRA-TERTIARY-ALKTL-O,O''-BIPHENOL AT A REACTION TEMPERATURE BETWEEN ABOUT 20* AND 300* C. AND AT A REACTION PRESSURE SUBSTANTIALLY ATMOSPHERIC AND ABOUT 1250 P.S.I.G. AND RECOVERING SAID 4,4'',6,6''-TETRA-TERTIARY-ALKYL-O,O''-BIPHENOL.
References Cited (Backward Citations)
US2479948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |