Nissan Chemical Industries Limited

Hiroshi Kobayashi

Hideki Takamatsu

Satoshi Hoshiyama

Shinichiro Takigawa

Masahito Yoshimura

Shuichi Fukushima

An aliphatic, cycloaliphatic or aromatic polyol is incorporated in a catalyst of an organoaluminum halide and a nickel compound. The catalyst is used for a dimerization or codimerization of a lower monoolefin to improve a reaction velocity and a stability in the reaction.

Process for dimerizing or codimerizing lower monoolefin

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.

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Funabashi, Japan

Hiroshi Kobayashi