| 摘要 |
1347475 Catalyst composition SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 19 April 1971 [10 April 1970 30 Oct 1970] 17157/70 and 51776/70 Heading B1E [Also in Division C5] A catalyst composition comprising, on a porous carrier, one or more Gp. VIII noble metals and one or more metals having an electronegativity of greater than 1-6 but less than 2.0 (i.e. Re, W, Sn, Bi, Pb, Mo, Cd, Ge, Cu, Fe, Co, Ni, Ag, Tc, Tl, Hg or In) is preactivated or regenerated by (i) oxidising to ring the metals substantially into the oxidic state, (ii) sulphiding to bring the metals substantially into the sulphidic state and (iii) reducing to the metallic state. The catalyst suitably contains 0.01-3% wt Gp. VIII noble metal and 0.01-5% wt. additional metal. The carrier may be silica, alumina, zirconia, thoria, magnesia, boria or mixtures thereof, or zeolites and should have a S.A. of greater than 50 m<SP>2</SP>/g. The Examples relate to Re plus Pt on acidic or non-acidic alumina and Sn plus Pt on acidic or non-acidic alumina, these catalysts being calcined, sulphided with a hydrogen-hydrogen sulphide mixture and then reduced with hydrogen. |
