New catalytic systems for oxidative carbonylation of acetylene to maleic anhydride

A classification of polyfunctional catalytic systems based on discriminatio n of the main component (the catalyst participating in all stages of the fo rmation of the product of catalytic reaction) and elucidating the functions of additional components of a catalytic system is suggested. The role of a dditional components in a number of new palladium-based catalytic systems u sed in the synthesis of maleic anhydride by oxidative carbonylation of acet ylene was studied. It was established that the functions of Co and Fe phtha locyanine complexes (PcCo and Pc*Fe, respectively) in the mechanism of the process are different.