| 摘要 |
A catalytic composition obtained by mixing a chromium carboxylate also containing a defined proportion of free carboxylic acid, an aryloxy compound of magnesium, calcium, strontium or barium and a hydrocarbyl aluminum compound. A catalytic composition obtained by mixing a chromium carboxylate also containing a defined proportion of free carboxylic acid, an aryloxy compound of magnesium, calcium, strontium or barium and a hydrocarbyl aluminum compound. The aryloxy compound is of Formula (I): M(RO)2-nXn (I) M = Mg, Ca, Sr, Ba; RO = 6-80C aryloxy radical; X = H, 1-30C hydrocarbyl; n = integer 0 or 1. The hydrocarbyl aluminum compound is a tris(hydrocarbyl)aluminum, or a chlorinated or brominated compound of hydrocarbylaluminum of Formula AlR'mY3-m (II), or an alumoxane. R' = 1-6C hydrocarbyl; Y = Cl, Br; m = 1-3 An Independent claim is included for a method of oligomerizing ethylene using the claimed catalytic composition. |
