INVESTIGATION OF KINETIC COEFFICIENTS OF ELECTRIC HYPERFILTRATION EXTRACTION OF CHEMICAL SUBSTANCES FROM ANILINE-CONTAINING MANUFACTURING PROCESS SOLUTIONS

The data on extraction factor; hindrance factor and solvent specific flow value during electric hyperfiltration extraction of substances from aniline-containing manufacturing process solutions are obtained in this study. The interpretation of experimental materials (extraction factor; hindrance factor and solvent specific flow) in a dependence on current density; concentration; nature of dissolved substance and semipermeable membrane type is presented as well. It was established that extraction factor and hindrance factor for aniline-containing substances is increased due to the growth of current density and sulfuric acid concentration. Solvent specific flow value is increased under current density elevation; but it is decreased in response to concentration growth. The treatment of aniline-water solution with sulfuric acid results in hindrance factor increasing with the growth of sulfuric acid concentration in aniline-water solution on MGA-100 and OPM-K membranes which is explained by pH reduction of solution. Besides; dissociation degree and solubility of weak bases such as aniline elevate; Gibbs energy common value is decreased under absorption; which leads to reduction of aniline sorption by membranes. The presence of sulfuric acid in aniline-water solution brings about the formation of more complex space structures. These substances are retained by membrane better due to its higher dissociation degree; better water solubility; larger molecular size and more branched structure. The increasing in sodium chloride and sodium sulfate concentrations results in the decrease in its hindrance factors and solvent specific flow value through semipermeable membranes of MGA-100 and OPM-K types.Forcitation:Lazarev S.I.; Lazarev К.S.; Kovaleva О.А.; Каzakov V.G.; Strelnikov А.Е. Investigation of kinetic coefficients of electric hyperfiltration extraction of chemical substances from aniline-containing manufacturing process solutions. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 5. P. 74-80