Dimerization of butenes containing isobutene to minimize 2,2,4-trimethyl pentenes
AssigneeNissan Chemical Industries, Ltd.
InventorsSatoshi Hoshiyama, Shuichi Fukushima, Hiroshi Kobayashi, Hideki Takamatsu
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Abstract
In a dimerization of butenes containing isobutene, a formation of 2,2,4-trimethyl pentenes is minimized by using a specific nickel catalyst solution and an organoaluminum catalyst. The specific nickel catalyst is a nickel salt of a fatty acid having 1.5 to 40 wt. % of a free fatty acid and less than 0.1 wt. % of water. The C.sub.8 olefins having less 2,2,4-trimethyl pentenes obtained by the dimerization are quite important to produce excellent plasticizer.
Claims10
In a dimerization of a C.sub.4 fraction containing 5 to 55% of isobutene and a main component of n-butene to minimize the formation of 2,2,4-trimethyl pentenes, the improvement comprising carrying out the dimerization of butenes in the presence of a catalyst system of a nickel salt of fatty acid and 1.5 to 40 wt.% of a free fatty acid having less than 0.1 wt.% of a water content and an organoaluminum halide.
Dependencies are inferred from the claim text.