FIELD: chemistry.
SUBSTANCE: catalyst system includes a complex of chromium with a diphosphine ligand of general formula [(Ph2PXPPh2)Cr(THF)Cl3] or [(Ph2P(1,2-C6H4)PPh(1,2-C6H4)CH2OC2H5)]CrCl3, where X is selected from: a hydrocarbon biradical or a substituted hydrocarbon biradical, and also includes methylaluminoxane (activator) and trimethylaluminium (coactivator). Components of the system are in the following molar ratio: chromium complex:activator:coactivator = 0.12-0.13% : 24.97-42.22% : 57.66-74.91%.
EFFECT: high selectivity of the catalyst with respect to 1-hexene while maintaining efficiency of the catalyst system and reducing the amount of ethylene polymerisation by-products.
2 cl, 3 tbl, 19 ex
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