Patent ID: 6627778
Filing Date: 2003-09-30
Classification: C07C

Abstract:
A selective hydrogenation process for removing C10-C16 diolefins in a product, which is a mixture of paraffins and olefins that contains C10-C16 mono-olefins and C10-C16 diolefins, obtained from dehydrogenation of C10-C16 paraffins to produce mono-olefins, in said process, C10-C16 diolefins are selectively hydrogenated to mono-olefins, characterized in that the mixture stream is contacted with a specific hydrogenation catalyst in a plurality of separated hydrogenation reactors connected in series with pipes under the reaction conditions for hydrogenation; the inlet of each reactor has a hydrogen injection pipe respectively and hydrogen is injected into each reactor, wherein the amount of hydrogen injected from the inlet of each reactor respectively is such that the total hydrogen/diolefin molar ration of the selective hydrogenation is 0.5-2.0, and H2/diolefin molar ration; &ggr;-alumina having a specific surface ration of 50-300 m2/g and a pore volume of 0.2-2.0 cm3/g is used as the supporter of the hydrogenation catalyst, palladium being supported on the supporter as the main catalyst element and an element selected from silver, gold, tin, lead or potassium being supported on the supporter as the promoter.