Regioselective Preparation of beta - Isopropylnaphthalene Over Superacidic Solid or Supported Perfluorinated Sulfonic Acid Catalysts

摘要

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 (C4F9SO3H to C18F37SO3H) 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.