promoter

A new mechanism for the reaction of direct (additive) chlorination of ethylene with chlorine from the formation of 1,2-dichloroethane in the presence of FeCl₃ catalyst promoted by NaCl has been proposed. It was found that the rate depends on the active phase concentration of the catalyst and the promoter, as well as the formation of the Na[Fe(C₂H₄Cl)₄] complex, which is a surface intermediate of the reaction.

The kinetics of anodic processes on Pt/PtO and PbO₂ anodes has been studied in water solutions of acetic acid. The addition of sulfuric acid has a catalytic effect in the electrochemical synthesis of peroxyacetic acid. The choice of promoters of peroxide-particles formation has been proved. I^–, Cl^– (current efficiency is 1.2–1.5 %) particles have been defined as the most effective for platinum anode and I^–, F^– (current efficiency is 0.50–0.55 %) have been defined as the most effective for lead-dioxide anode.