Patent US4041085A successfully refreshed from Google Patents.
US4041085A
Expired / Lapsed
US
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Ortho-alkylation of phenols
Assignee: General Electric Co
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Filing: 1975-11-17
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Granted: 1977-08-09
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Expires: 1995-11-17
Abstract
Abstract This invention is for a process for the ortho-alkalation of phenols in the presence of a magnesium oxide alkylation catalyst. The process comprises the vapor phase reaction of a non-ortho-substituted phenol with an alcohol in the presence of an alkylation catalyst and is characterized by the introduction of water vapor into the reaction system. The water vapor effects continuous regeneration thereby substantially increasing catalyst life before regeneration is required. This is an important advantage as it increases the period of reactor operation before shut down is required, thereby making the overall process more economical.
Inventors
- 👤 Alton J. Frabetti, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:33
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/16; B; B01; B01J; B01J37/00; B01J37/0009; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
78 words
In a process for selectively alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of a magnesium oxide alkylation catalyst of an alkyl alcohol and a phenol having the general formula: ##STR2## where R is a monovalent substituent from the group consisting of hydrogen, alkyl, phenyl and alkyl substituted phenyl; the improvement comprising adding water vapor to the vapor phase reaction in which said phenol is treated with said alkyl alcohol.
Claim 2
Dependent Claim
78 words
In a process for selectively alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of a magnesium oxide alkylation catalyst of an alkyl alcohol and a phenol having the general formula: ##STR2## where R is a monovalent substituent from the group consisting of hydrogen, alkyl, phenyl and alkyl substituted phenyl; the improvement comprising adding water vapor to the vapor phase reaction in which said phenol is treated with said alkyl alcohol.
Claim 3
Dependent Claim
23 words
The process of claim 1 where the water vapor constitutes from 3 to 15% by weight of the alkyl alcohol and the phenol.
Claim 4
Dependent Claim
11 words
The process of claim 2 where the alcohol is methyl alcohol.
Claim 5
Dependent Claim
20 words
The process of claim 2 where the catalyst bed temperature is maintained at a temperature of at least 440° C.
Claim 6
Dependent Claim
11 words
The process of claim 2 where each R is a hydrogen.
Claim 7
Dependent Claim
10 words
The process of claim 2 where the phenol is ortho-cresol.
Claim 8
Dependent Claim
17 words
The process of claim 2 where the phenol is a mixture of unsubstituted phenol and ortho cresol.
Claim 9
Dependent Claim
15 words
The process of claim 2 where the magnesium oxide catalyst is substantially pure magnesium oxide.
Claim 10
Dependent Claim
23 words
The process of claim 2 where the magnesium oxide catalyst comprises magnesium oxide and from 2 to 15% by weight of a binder.
Claim 11
Dependent Claim
23 words
The process of claim 9 where the the binder is selected from the group consisting of silica, manganese oxides and organic polymeric binders.
Claim 12
Dependent Claim
14 words
The process of claim 10 where the organic polymeric binder is a cellulosic polymer.
Claim 13
Dependent Claim
111 words
In a process for selectively alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of an alkylation catalyst comprising magnesium oxide and from 2 to 15% by weight of a binder which is a mixture of manganese oxides of an alkyl alcohol and a phenol having the general formula: ##STR3## where R is a monovalent substituent from the group consisting of hydrogen, alkyl, phenyl and alkyl substituted phenyl, the improvement comprising adding from 3 to 15% by weight of water vapor based on the alkyl alcohol and the phenol to the vapor phase reaction in which said phenol is treated with said alkyl alcohol.
Claim 14
Dependent Claim
111 words
In a process for selectively alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of an alkylation catalyst comprising magnesium oxide and from 2 to 15% by weight of a binder which is a mixture of manganese oxides of an alkyl alcohol and a phenol having the general formula: ##STR3## where R is a monovalent substituent from the group consisting of hydrogen, alkyl, phenyl and alkyl substituted phenyl, the improvement comprising adding from 3 to 15% by weight of water vapor based on the alkyl alcohol and the phenol to the vapor phase reaction in which said phenol is treated with said alkyl alcohol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |