Abstract: A process for the hydrogenation of aromatics contained in a hydrocarbon feedstock and for the bulk sulfiding of a nickel-based catalyst to enhance the activity and catalyst life thereof. The process includes passing at the start-of-run a dispersed hydrocarbon feedstock through a bed of the nickel-based catalyst at an elevated temperature effective in promoting the bulk sulfiding the nickel-based catalyst so as to thereby increase its activity or catalytic life, or both.

Abstract: A process for selectively hydrogenating butadiene that is contained in a C4 stream having a concentration of a catalyst poison and C4 olefins, including 1-butene, and further the process provides for the substantial isomerization of the 1-butene to 2-butene of the C4 olefin stream, wherein the process comprises contacting, under suitable process conditions, the C4 stream with a poison tolerant catalyst comprising an alumina support material and partially sulfided nickel on the alumina support material at a concentration in the range of from 5 to 40 weight percent nickel, and yielding a product having a minimal butadiene concentration and a reduced concentration 1-butene.

Abstract: Described is a method for the selective hydrodesulfurization of an olefin-containing hydrocarbon feedstock that uses a catalyst composition having a high content of a nickel component and an effective but small amount of a molybdenum component supported on a porous refractory oxide. A preferred catalyst composition contains an immaterial amount of a cobalt component.

Abstract: The present invention relates to an improved process for the hydrogenation of aromatics in hydrocarbon feedstocks containing thiopheneic compounds as impurities, the aromatics hydrogenation being conducted in a hydrogenation reactor in the presence of a nickel based catalyst. The improvement comprises operating the hydrogenation reactor at a reaction temperature sufficiently high from the start of a run, that the thiopheneic compounds are decomposed and substantially absorbed into the bulk of the nickel catalyst, thereby substantially extending the life of the catalyst.

Abstract: A catalyst having dual functionality for the removal of arsenic and the selective hydrogenation of diolefins from monoolefin-containing hydrocarbon streams that have an arsenic concentration and a diolefin concentration, and processes for making and using such catalyst. The catalyst is a heat treated shaped mixture of a refractory oxide and a Group VIII metal that is overlaid with additional Group VIII metal.

Abstract: A solid, particulate catalyst composition is provided containing an active nickel component in which the nickel constitutes from about 25 to about 60 wt % of the catalyst composition; a molybdenum component in which the molybdenum constitutes from about 5 to about 20 wt % of the catalyst composition; and a binder component comprising at least one of oxides of silica, zirconium, aluminum, zinc and calcium, each of the calcium, aluminum and zinc being present in an amount no greater than about 2 wt %, preferably about 0 to 1 wt %. The catalyst is designed for the selective hydrogenation of 3-hydroxypropanal to 1,3-propanediol in aqueous solution.

Abstract: A solid, particulate catalyst composition is provided containing an active nickel component in which the nickel constitutes from about 25 to about 60 wt % of the catalyst composition; a molybdenum component in which the molybdenum constitutes from about 5 to about 20 wt % of the catalyst composition; and a binder component comprising at least one of oxides of silica, zirconium, aluminum, zinc and calcium, each of the calcium, aluminum and zinc being present in an amount no greater than about 2 wt %, preferably about 0 to 1 wt %. The catalyst is designed for the selective hydrogenation of 3-hydroxypropanal to 1,3-propanediol in aqueous solution.