Mitsubishi Chemical Corporation

Takeshi Okano

Hirofumi Nakamura

Takayuki Aoshima

Shinji Iwade

Yoshitaka Araki

Yoshiaki Nanba

Hisao Urata

Toshiyuki Oshiki

Eiji Tanaka

Akio Tsuboi

Takashi Ishikawa

Syunji Katsuki

Riichirou Kawashima

Jun Takahara

The disclosure described a process for producing an .alpha.-olefin oligomer, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent in the presence of a catalytically effective amount of a chromium-based catalyst system composed of a combination of at least (a) a chromium compound, (b) a nitrogen-containing compound of at least one selected from the group consisting of an amine, an amide and an imide, (c) an alkylaluminum compound and (d) a halogen-containing compound,

Process for producing .alpha.-olefin oligomers

The present invention relates to a process for producing an .alpha.-olefin oligomer by subjecting .alpha.-olefin to oligomerization in a reaction zone in the presence of a reaction solution containing a chromium-based catalyst, which comprises,

Process for producing .alpha.-olefin oligomer

The disclosure describes a process for preparing .alpha.-olefin oligomers, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent by reacting said .alpha.-olefin in a chromium-based catalyst system composed of a combination of at least a chromium compound, an amine or metal amide, and an alkylaluminum compound, in a contacting mode that the chromium compound and the alkylaluminum compound are not previously contacted with each other.

Process for producing .alpha.-olefin oligomers and .alpha.-olefin

An oligomerization of .alpha.-olefins is carried out in a solvent using a chromium-based catalyst system comprising at least (a) a chromium compound, (b) at least one nitrogen-containing compound selected from amines, amides and imides, and (c) an alkylaluminum compound, and the catalyst components and by-product polymers are recovered simultaneously from the reaction solution. Such process is an industrially advantageous process for producing .alpha.-olefin oligomers by using a chromium-based catalyst, and is simple and capable of efficiently recovering the by-product polymers and the catalyst components simultaneously.

Process for the preparation of .alpha.-olefin oligomers

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Kurashiki, Japan

Takeshi Okano