A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) (i) a halogen-containing iron compound or (ii) an iron-containing compound and a halogen-containing compound, (b) an &agr;-acylphosphonate diester, and (c) an organoaluminum compound.
一种催化剂组合物,它是由以下成分的组合或反应产物组成的:(a) (i) 含卤素的
铁化合物或 (ii) 含
铁化合物和含卤素的化合物,(b) &agr;-酰基
膦酸二酯,和 (c)
有机铝化合物。