US4117244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing 2,6-ditertbutyl-4-methylphenol
Assignee: Individual
•
Filing: 1976-06-11
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Granted: 1978-09-26
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Expires: 1996-06-11
Abstract
Abstract A method of producing 2,6-ditertbutyl-4-methylphenol comprises hydrogenolysis of N,N-dimethyl-(3,5-ditertbutyl-4-hydroxybenzyl)-amine in the presence of a fused catalyst, containing Ni, Al, Ti, in the medium of a solvent, namely 2,6-ditertbutyl-4-methylphenol solvent medium. The invention allows improving the quality of the product and obtaining it with a high yield.
Inventors
- 👤 Ivan Egorovich Abramov
- 👤 Felix Borisovich Gershanov
- 👤 Vladimir Romanovich Dolidze
- 👤 Nina Vasilievna Zakharova
- 👤 Alexandr Grigorievich Liakumovich
- 👤 Jury Ivanovich Michurov
- 👤 Vasily Dmitrievich Popov
- 👤 Grigory Iosifovich Rutman
- 👤 Zoya Stepanovna Shalimova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
In a method of producing 2,6-ditertbutyl-4-methylphenol which comprises hydrogenolysis of N,N-dimethyl-(3,5-ditertbutyl-4-hydroxy-benzyl)-amine in the presence of a fused catalyst containing Ni, Al, and Ti, in the medium of a solvent, the improvement comprising using 2,6-ditertbutyl-4-methylphenol as the solvent.
Claim 2
Dependent Claim
37 words
In a method of producing 2,6-ditertbutyl-4-methylphenol which comprises hydrogenolysis of N,N-dimethyl-(3,5-ditertbutyl-4-hydroxy-benzyl)-amine in the presence of a fused catalyst containing Ni, Al, and Ti, in the medium of a solvent, the improvement comprising using 2,6-ditertbutyl-4-methylphenol as the solvent.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the hydrogenolysis is carried out at a temperature of 110° C.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the hydrogen flow rate is 25 ml/min.
Claim 5
Dependent Claim
17 words
The method of claim 3 wherein the catalyst consists of 50% Ni, 45% Al and 5% ti.
References Cited (Backward Citations)
GB1229480A
Cited
US3946086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |