Ivanovo, Ivanovo, Russian Federation
Ivanovo, Ivanovo, Russian Federation
UDC 546.742
UDC 546.223.1
The paper investigates the kinetics of the reaction of nickel chloride with sodium dithionite in an aqueous solution, proceeding with the formation of metallic nickel via the reduction of nickel cations. As a result, parallel to the main process stage, reactions of sodium dithionite decomposition occur, yielding sulfite, thiosulfate, and sulfide as final products. Based on the analysis of experimental data and literature, a stoichiometric mechanism of the process has been proposed. Using mathematical modelling, the inverse kinetic problem of determining the rate constants of individual process stages has been solved. According to the comparison of experimental and calculated kinetic dependencies, the proposed mathematical model correlates with the experimental data.
mechanism of the chemical reaction, kinetics modelling, rate constant, dithionite, nickel
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