CARBONYLATION METHOD FOR PRODUCING ACETIC ACID USING METALLIC CATALYSTS WITH CHELATE-LIKE LIGANDS Russian patent published in 2012 - IPC C07C53/08 B01J31/24 C07C51/12 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing acetic acid through carbonylation of methanol and/or reactive derivative selected from methyl acetate, methyl iodide, dimethyl ether and mixtures thereof, carbon monoxide in the presence of a catalyst in a liquid reaction mixture containing methyl iodide and water in concentration of 0.1-30 wt %, wherein the catalyst includes a complex of a metal with a chelate-like ligand of general formula (I), wherein Z represents carbon, each of L₁ and L₂ represents a coordination group containing a donor P atom or a donor N atom; each R₃ is independently selected from hydrogen, or a C₁-C₆ alkyl group, and M is selected from Rh and Ir; or general formula (II), wherein Z represents carbon, each of L₃ and L₄ represents a coordination group containing a donor P atom or a donor N atom, and M is selected from Rh and Ir.

EFFECT: method provides high selectivity of formation of acetic acid.

14 cl, 2 tbl, 6 ex