| 摘要 |
Improved process for dimerizing lower alpha -olefins using a novel nickel-containing Ziegler catalyst system comprising… (A) an organic acid salt or complex of nickel,… (B) a trialkylaluminum,… (C) a trivalent phosphorus compound of the formula:… PR<1>R<2>R<3> (I)… P(NR<1>2)3 (II)… P(OR<1>)3 (III)… wherein R<1>, R<2>, R<3> are alkyl, cycloalkyl, aryl or aralkyl,… (D) a fluorinated isopropanol of the formula:… CFmH3-m-@@-CFnH3-n…… (IV)… wherein m and n are in 4 </= m+n </= 6, and optionally… (E) a catalyst co-activator: halogenated compounds of the formulae: …<CHEM>… wherein X is halogen, R<4>, R<5>, R<6> 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 gives the dimers with high selectivity of isomers and uniformity of catalyst without corrosion of apparatus. |
