| abstract |
The present invention relates to a halogen-containing compound represented by Formula I and its use as a ligand in an ethylene oligomerization catalyst composition, an ethylene oligomerization catalyst composition comprising the halogen-containing compound, and ethylene oligomerization using the catalyst composition A method, a method for ethylene trimerization, and a method for ethylene tetramerization are disclosed. When a halogen-containing polymer is used as a ligand of a catalyst for ethylene oligomerization, the catalytic performance of the catalyst system can be effectively improved, and in particular, the catalytic performance is significantly improved in the ethylene oligomerization reaction, and the catalytic activity is up to 4×10 8 g mol(Cr) -1 h -1 may be exceeded, the overall selectivity of 1-hexene and 1-octene exceeds 92 wt%, and the content of 1-hexene in the C6 product can reach about 97%. and the content of 1-octene in the C8 product may reach 98% or more. The catalyst composition has excellent industrial application prospects and economic value. (Formula I) |