Patent US4201880A successfully refreshed from Google Patents.
US4201880A
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US
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Preparation of ortho-alkylated phenols
Assignee: General Electric Co
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Filing: 1978-02-21
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Granted: 1980-05-06
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Expires: 1998-02-21
Abstract
Abstract This invention is for a shaped, alkylation catalyst comprising magnesium oxide bonded with silica and to the use of the catalyst in a process for the ortho-alkylation of phenols. The process comprises the vapor phase reaction of a non-ortho-substituted phenol with an alcohol in the presence of a catalyst. The catalyst of the invention is an improvement over prior art catalysts used for ortho-alkylation of phenols as it substantially increases reaction selectivity, eliminates loss of catalyst arising with the use of powders or weakly sintered composites and has a substantially extended useful life.
Inventors
- 👤 Bernardus J. Van Sorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:32
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14; C; C07; C07C; C07C37/00; C07C37/11; C07C37/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
In a process for alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of an alkylation catalyst of an alkyl alcohol and a phenol having the general formula ##STR2## where R is a monovalent substituent selected from the group consisting of hydrogen, lower alkyl, phenyl, and lower alkyl substituted phenyl; the improvement comprising performing the reaction at a temperature of about about 460° C. in the presence of a molded to shape catalyst comprising a mixture of a magnesium oxide bonded with a minor amount of silica, the catalyst having a surface area of at least 20 square meters per gram and containing from about 1 to about 15% by weight of silica.
Claim 2
Dependent Claim
120 words
In a process for alkylating a phenol in the ortho position which comprises the vapor phase reaction in the presence of an alkylation catalyst of an alkyl alcohol and a phenol having the general formula ##STR2## where R is a monovalent substituent selected from the group consisting of hydrogen, lower alkyl, phenyl, and lower alkyl substituted phenyl; the improvement comprising performing the reaction at a temperature of about about 460° C. in the presence of a molded to shape catalyst comprising a mixture of a magnesium oxide bonded with a minor amount of silica, the catalyst having a surface area of at least 20 square meters per gram and containing from about 1 to about 15% by weight of silica.
Claim 3
Dependent Claim
12 words
The process of claim 1 where the alkyl alcohol is methyl alcohol.
Claim 4
Dependent Claim
20 words
The process of claim 2 where the catalyst bed temperature is maintained at a temperature of at least 460° C.
Claim 5
Dependent Claim
10 words
The process of claim 2 where each R is hydrogen.
Claim 6
Dependent Claim
10 words
The process of claim 2 where the phenol is ortho-cresol.
Claim 7
Dependent Claim
16 words
The process of claim 2 where the phenol is a mixture of unsubstituted phenol and ortho-cresol.
Claim 8
Dependent Claim
19 words
The process of claim 2 where the silica comprises from 1 to 15% by weight of the total catalyst.
Claim 9
Dependent Claim
19 words
The process of claim 2 where the silica comprises from 2 to 6% by weight of the total catalyst.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein the catalyst is in the shape of pellets.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein the catalyst is in the shape of a Rashig ring.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |