CATALYST AND PROCESS FOR CONVERTING HYDROCARBONS

摘要

1286304 Dysprosium alumina-silicate zeolite catalyst composition SUN OIL CO 1 Aug 1969 [2 Aug 1968] 38693/69 Heading B1E [Also in Division C5] A catalyst composition comprises (i) an acidic Dysprosium alumino-silicate zeolite containing less than one alkali metal cation and at least one divalent or trivalent metal, metal oxide or metal hydroxide cation for every 12 atoms of aluminium in the aluminosilicate framework and (ii) 0.05 to 5% of a hydrogenation catalyst such as platinum, palladium, nickel, rhodium, rhenium, ruthenium, molybdenum, cobalt, or an oxide or sulphide of these metals. The composition is used, suitably in combination with halide adjuvants containing chlorine, fluorine or bromine, in the conversion of hydrocarbons. The hydrogenation catalyst may be incorporated on a carrier e.g. α-alumina, microporous silica, conventional amorphous silica-alumina cracking catalyst, or acid exchange clays such as montmorillonites or kaolin) whereon it is physically admixed with the Dy catalyst, or it may be incorporated into the zeolite by salt impregnation or ion-exchange, in the latter case preferably being reduced, e.g. with hydrogen, prior to use of the catalyst. In the Dy aluminosilicate at least 25% of the electronegativity associated with the alumino-silicate framework is satisfied by cations of dysprosium or of its oxides or hydroxides, the balance of the cations being H+ or cations of metals, such as Mg, Al, Ag, Ni, Zn, Ce, Gd, La or mixtures of these, metal oxides or metal hydroxides. Preferably, the zeolite catalyst is crystalline, capable of absorbing benzene, has an atomic ratio Al/Si of 0.65 to 0.35 and contains at least one Dy(OH) 2 + cation for every 8 atoms of aluminium in the alumino-silicate framework.