| abstract |
(57) Abstract: A novel catalyst composition for the production of light alpha-olefins by oligomerization of ethylene is provided. A zirconium compound ZrX x Y y O z (X is Cl or Br, Y is an alkoxy, amide or carboxylate, x and y are integers 0 to 4, z is 0 or 0.5, total x + y + 2z is 4) and an organic compound (R 1 ′) (R 2 ') C (OR 1) (OR 2) (R 1' And R 2 ′ are H or a C 1-30 hydrocarbon group, and R 1 and R 2 are a C 1-30 hydrocarbon group). IR ″ n X 3-n (R ″ is a C 1-6 hydrocarbon group, X is Cl or Br, and n is a number 1-2); An improved catalyst composition obtained by mixing with IR ″ ′ 3 (R ′ ″ is a C 1-6 hydrocarbon group). |