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US4533769A
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Method of making methylated phenol from methylated cyclohexeneone
Assignee: General Electric Co
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Filing: 1984-05-24
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Granted: 1985-08-06
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Expires: 2004-05-24
Abstract
Abstract A method is provided for making 3,5-dimethylphenol from isophorone by catalytic demethanation using as a catalyst, the calcination residue of a mixture of magnesium carbonate and/or magnesium hydroxide and a manganese compound.
Inventors
- 👤 John J. Talley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:56
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/50; C07C37/06; C07C37/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A method for making a methylated phenol having the formula, ##STR3## which comprises (1) pyrolyzing at a temperature in the range of from 300° C. to 700° C., a polymethylated cyclohexene-1-one having the formula ##STR4## in the presence of an effective amount of a demethanation catalyst consisting essentially of the calcination residue of a mixture of magnesium carbonate and/or magnesium hydroxide and a manganese compound (2) recovering the methylated phenol from the mixture of (1), where R is a member selected from hydrogen or methyl, R 1 is a member selected from hydroxy, --OR 3 and methyl, R 2 is selected from methyl and --OR 3 and R 3 is a C.sub.(1-6) alkyl radical.
Claim 2
Independent Claim
114 words
A method for making a methylated phenol having the formula, ##STR3## which comprises (1) pyrolyzing at a temperature in the range of from 300° C. to 700° C., a polymethylated cyclohexene-1-one having the formula ##STR4## in the presence of an effective amount of a demethanation catalyst consisting essentially of the calcination residue of a mixture of magnesium carbonate and/or magnesium hydroxide and a manganese compound (2) recovering the methylated phenol from the mixture of (1), where R is a member selected from hydrogen or methyl, R 1 is a member selected from hydroxy, --OR 3 and methyl, R 2 is selected from methyl and --OR 3 and R 3 is a C.sub.(1-6) alkyl radical.
Claim 3
Dependent Claim
13 words
A method in accordance with claim 1, where the methylated cyclohexanone is isophorone.
Claim 4
Dependent Claim
13 words
A method in accordance with claim 1, where the methylated phenol is 3,5-dimethylphenol.
References Cited (Backward Citations)
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Cited
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |