| 摘要 |
An improved process for dimerizing lower alpha -olefins using a novel nickel-containing Ziegler catalyst system including (A) an organic acid salt or complex of nickel, (B) a trialkylaluminum, (C) a trivalent phosphorus compound of the formula: PR1R2R3 (I) P(NR12)3 (II) P(OR1)3 (III) wherein R1, R2, R3 are alkyl, cycloalkyl, aryl or aralkyl, (D) a fluorinated isopropanol of the formula: <IMAGE> (IV) wherein m and n are in 4</=m+n</=6, and optionally (E) a catalyst co-activator: halogenated compounds of the formulae: <IMAGE> (V) and R4R5R6CX (VI) wherein X is halogen, R4, R5, R6 are alkyl, and n is 1 to 3, and further optionally, (F) a compound selected from aliphatic alcohol and aliphatic carboxylic acid or ester thereof, which yields the dimers with high selectivity of isomers and uniformity of the catalyst without corrosion of the apparatus.
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