| 摘要 |
Arylnaphthenes or alkyl derivatives thereof are obtained by contacting an aromatic hydrocarbon or alkyl derivative thereof in the liquid phase at not more than 250 DEG C. with a catalyst comprising a hydrogenation component and a heteropoly acid in the presence of hydrogen at a pressure below 100 atm. The catalyst is preferably supported on a carrier or a cracking catalyst, e.g. thoria, alumina, magnesia, zirconia, silica, silica gel, kieselguhr, carbon, mixtures of silica with alumina, calcium oxide, zirconia or magnesia or an acid clay. The hydrogenation catalyst may be Ni, Co, Fe, Pt, Pd, Ir, Os, Rh, Ru, an oxide of Cr, Mo or W or a sulphide of Mo, Ni or W. The hydrogenation component may be present in an amount of 0.1-25% by weight of the heteropoly acid which may be silicotungstic, borotungstic, phosphotungstic, phosphomolybdic, boromolybdic, silicomolybdic, phosphotungstimolybdic, arsenomolybdic or antimonytungstic acid. Inert gases, e.g. nitrogen or saturated hydrocarbons may be present and also liquid hydrocarbons, e.g. cyclohexane or decahydronaphthalene. Benzene yields phenylcyclohexane, cyclohexane and some dicyclohexylbenzene; toluene yields toluyl cyclohexane. Other starting materials specified are xylenes, naphthalene, benzene and naphthalene (yielding phenyl-hydronaphthalene), methylnaphthalene and toluene and naphthalene (yielding toluyl-hydronaphthalene).ALSO:Catalysts for converting (alkyl) aromatic hydrocarbons to (alkyl) aryl (alkyl) naphthenes in the presence of hydrogen comprise a hydrogenation component and a heteropoly acid, optionally on a support. The hydrogenation component which forms 0,1-25% by weight of the heteropoly acid may be Ni, Co, Fe, Pt, Pd, Ir, Os, Ru, Rh, an oxide of Cr. Mo or W or a sulphide of Mo, Ni or W. Suitable heteropoly acids are silico-, boro-, phospho-, or antimony-tungstic acid and phospho-, boro-, silico-, phosphotungsti- or arseno-molybdic acid. The carrier may be thoria, alumina, magnesia, zirconia, silica, silica gel, kieselguler, carbon, silica mixed with alumina, calcium oxide, zirconia or magnesia or an acid clay. The combinations are prepared by mixing the hydrogenation catalyst with the acid or to distribute the acid in a solution of a compound of the metal of the hydrogenation catalyst, remove the solvent and form the hydrogenation catalyst. |
