Selective hydrogenation of highly unsaturated hydrocarbons in the presence of less unsaturated hydrocarbons
AssigneeImperial Chemical Industries PLC
InventorBruce M. Collins
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Abstract
A catalyst for selective hydrogenation of highly unsaturated hydrocarbons in the presence of less unsaturated hydrocarbons comprises palladium supported on alumina having a defined combination of micromeritic properties, the palladium being present mainly in the regions of the catalyst particles not more than 150 microns beneath their geometric surface. The alumina is made suitably by calcining pseudobohmite at 1000.degree.-1200.degree. C. The catalyst has a long working life in "front-end" or "tail-end" hydrogenation.
Claims8
A process of selective hydrogenation of highly unsaturated hydrocarbons in the presence of less unsaturated hydrocarbons characterised by the use of a catalyst which comprises palladium supported on particulate alumina having a surface area in the range 5 to 50 m.sup.2 g.sup.-1, a helium density of under 5 g cm.sup.-3, a mercury density of under 1.4 g cm.sup.-3 and a pore volume of at least 0.4 cm.sup.3 g.sup.-1, at least 0.1 cm.sup.3 g.sup.-1 of which is in pores of radius over 300 Angstrom units, the palladium being present mainly in the region of the catalyst particles not more than 150 microns beneath their geometric surface.
Dependencies are inferred from the claim text.