FIELD: chemical technology.
SUBSTANCE: halogen-containing compound represented by formula I, where R1, R2, R3, and R4 in formula I are the same or different and each independently represents chlorine or fluorine, all of R1, R2, R3, and R4 are ortho substituents; R5 and R6 are the same or different and are each independently hydrogen, C1-C12 alkyl, C3-C12 cycloalkyl, phenyl, methylphenyl, ethylphenyl, or chlorophenyl. Also proposed are the use of the said halogen-containing compound as a ligand in an ethylene oligomerization catalyst composition, an ethylene oligomerization catalyst composition containing said halogen-containing compound, and methods for ethylene oligomerization, trimerization, and tetramerization using the said catalyst composition.
EFFECT: significant improvement in activity and selectivity in the ethylene oligomerization reaction, in particular in the ethylene trimerization and ethylene tetramerization reactions, and significant reduction in formation of by-products such as cycloolefin and cyclization product.
36 cl, 3 tbl, 65 ex
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Authors
Dates
2023-08-22—Published
2019-10-30—Filed