| 摘要 |
A catalyst which may be used for the hydrogenation of acetylenes is obtained by impregnating a porous catalyst base with a solution of a nickel compound which is decomposable by the action of heat to metallic nickel, and thereafter heating the impregnated porous support whereby metallic nickel is deposited on the support and sweeping out volatile decomposition products of the nickel compound by means of a stream of gas passed over the catalyst at a flow rate greater than 250 vol./vol./hours. The nickel compound is preferably nickel formate and the carrier may be calcium oxide, barium oxide, strontium oxide, magnesium oxide, calcium carbonate, barium carbonate, strontium carbonate, magnesium carbonate, diatomaceous earths, charcoal, graphite, pumice, deactivated alumina or sepiolite. The gas for sweeping out volatiles preferably contains hydrogen or nitrogen but may also be carbon dioxide or methane. The purification of ethylene or propylene containing acelytenes is effected by selective hydrogenation in the presence of the above catalyst at 0 DEG -200 DEG C. and 0-1,000 p.s.i.g. Hydrogen is supplied as such or as a tail gas from reforming steam cracking, catalytic cracking or dehydrogenation. Specification 899,652 is referred to. |
