Preparation of 2,4,6-trialkylphenols
US4418223A · kind A · utility
1Cited by
8References
6Claims
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Key dates
| Filing date | Mar 29, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Mar 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenols may be alkylated with monosubstituted or alpha, beta-disubstituted olefins over a silica alumina composite to afford 2,4,6-tri-sec-alkylphenols in high yields. The alkylation catalyst shows high activity and high selectivity to the 2,4,6-trialkylated product while minimizing oligomerization of the olefin. Composites containing from about 40 to about 60% silica, the remainder being alumina, are especially valuable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.