CATALYST SYSTEM Russian patent published in 2009 - IPC B01J31/24 B01J23/44 B01J23/74 C07C51/14 

FIELD: chemistry.

SUBSTANCE: present invention relates to a new catalyst system, a new carbonylation reaction medium and to a method of carbonylation of ethylene-unsaturated compounds using the new catalyst system. The catalyst system, which is capable of catalysing carbonylation of an ethylene-unsaturated compound, can be obtained by combining: a) group VIIIB metal, or its compound, b) bidentate phosphinic or arsinic ligand and c) acid, where the said ligand is present in molar excess of at least 2:1, compared to the said metal or said metal in its compound, and the said acid is present in molar excess ranging from 5:1 to 95:1, compared to the said ligand. In another version the catalyst system, which is capable of catalysing carbonylation of an ethylene-unsaturated compound, can be obtained by combining: a) group VIIIB metal, or its compound, b) bidentate phosphic or arsinic ligand and c) acid, where molar ratio of the said ligand to the said metal or said metal in its compound lies in the range greater than 5:1 to 750:1, and the said acid is present in molar excess of at least 2:1, compared to the said ligand.

EFFECT: invention also relates to a method of carbonylation of an ethylene-unsaturated compound, a reaction medium, use of catalyst a system and a complex, which is capable of catalysing carbonylation of an ethylene-unsaturated compound.

39 cl, 35 ex, 9 tbl, 3 dwg