| 摘要 |
The invention comprises a composition of an amorphous base - exchange aluminosilicate having an SiO2/Al2O3 ratio greater than 3, having less than 90% of its Al atoms associated with cations, and having a metal selected from Group Ib, IIb, VIb or VIII of the Mendel</>aeeff Periodic Table dispersed thereon, the dispersion of the metal being such that its atomic characteristics are dominant in the composition. Specified metals are Au, Ag, Hg, Cu, Mo, Fe, Co, Ni, Pt, Pd, Ru, Rh, Os and Tv. The composition may be prepared by slurrying 1 part of an amorphous base-exchange aluminosilicate with at least 2 parts of a salt solution of the metal to be dispersed and maintaining the solution in intimate contact with the aluminosilicate until the metal is present on the support in an amount of at least 0.05%, the solution containing 200 parts by weight of solvent to one part by weight of metal salt, and activating the ion-exchanged support to effect reduction and deposition of the metal. Examples describe the preparation of Cu and Pd-loaded catalysts and their use for hydrodesulphurization &c. Specification 980,502 is referred to.ALSO:Catalysts used in hydrocarbon conversions consist of metals selected from Group Ib, IIb, VIb and VIII of the Mendel</>aeeff Periodic Table supported on base exchange aluminosilicate having an SiO2/Al2O3 ratio greater than 3 and having less than 90% of its Al atoms associated with cations. Examples given are the dehydrogenation (with isomerization in the case of five-membered rings) of naphthenes, aromatization of paraffins, hydrocracking of paraffins, hydrogenation of olefins, isomerization of paraffins, reforming and desulphurization of petroleum fractions. Specification 980,502 is referred to.ALSO:The invention comprises a composition of an amorphous base-exchange aluminosilicate having an SiO2/Al2O3 ratio greater than 3, having less than 90% of its Al atoms associated with cations, and having a metal selected from Group IB, IIB, VIB or VIII of the Mendeleef Periodic Table dispersed thereon, the dispersion of the metal being such that the "atomic characteristics" of p the metal are dominant in the composition. The dispersed metal must have an atomic structure containing unpaired electrons. "Atomic characteristics" is defined as the electron paramagnetic moment of the metal dispersed. The composition may be prepared by slurrying 1 part of an amorphous base exchange aluminosilicate with at least 2 parts of a solution of a salt of the metal to be dispersed and maintaining the solution in intimate contact with the aluminosilicate until the metal is present on the support in an amount of at least 0,05%, the solution containing at least 200 parts by weight of solvent to one part by weight of metal salt, and activating the ion-exchanged support to effect reduction and deposition of the metal. Specified metals are Au, Ag, Hg, Cu, Mo, Pt, Pd, Fe, Co, Ni, Ru, Rh, Os and Ir. Examples describe the preparation of Cu and Pt loaded catalysts and their use in hydroconversion, desulphurization &c. Specification 980,502 is referred to. |
