Regioselective preparation of .beta.-isopropylnaphthalene over superacidic solid or supported perfluorinated sulfonic acid catalysts
US4288646A · kind A · utility
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8Claims
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Key dates
| Filing date | Oct 5, 1979 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Oct 5, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2531/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of .beta.-isopropylnaphthalene in high regioselectivity (90-98%) by alkylation of naphthalene over solid or supported superacid catalysts, such as a perfluorinated alkanesulfonic acid of four to eighteen carbon atoms (C.sub.4 F.sub.9 SO.sub.3 H to C.sub.18 F.sub.37 SO.sub.3 H) or a polymeric perfluorinated resin-sulfonic acid, such as the acid form of the commercially available Nafion-K ion-membrane resin (DuPont). Further isomerization of mixtures of isomeric isopropylnaphthalenes to preferentially pure .beta.-isopropylnaphthalene can also be effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.