Selective dealkylation of 4-tertiary-alkyl-2,5-xylenol
US4228311A · kind A · utility
3Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Jun 8, 1979 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Jun 8, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is described for the selective dealkylation of 4-tertiary-alkyl-2,5-xylenol while it is admixed with 6-tertiary-alkyl-2,4-xylenol by contacting the mixture of alkylated xylenols with a polymer-bound sulfonic acid catalyst at temperatures of 60.degree. C. or less and pressures of from about 0.5 to 5 atmospheres. The method is useful in separating 2,4-/2,5-xylenol mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.