Influence of solvent polarity on reactive extraction of fumaric acid with Amberlite LA-2 from viscous solutions

Abstract

ABSTRACT Current studies on the reactive extraction of fumaric acid with Amberlite LA-2 from aqueous phases with different viscosities using three solvents highlighted the influences of rheological properties of the fermentation medium on the efficiency of the extraction system. The obtained results showed that increasing the viscosity of the aqueous phase influences both the efficiency of the reactive extraction and the magnitude of the diffusional and kinetic resistances. The negative effect of increasing the viscosity of fumaric acid solutions on the interfacial mass flow of the product resulting from the reaction between acid and extractant was described by the reduction factor. For dichloromethane, by increasing the speed from 200 to 1000 rpm, the R factor increases 1.05 times for 8 cP and 3.56 times for 64 cP, while for n-heptane R factor increases 1.11 times for 8 cP and 9 times for 64 cP. The positive effect of alcohol was quantified using the amplification factor, which reached maximum values for n-heptane, under similar experimental conditions. The influences of studied factors on interfacial mass flow of the complex formed by reaction of fumaric acid with amine extractant have been quantified by mathematical expressions, proposed for extraction system without and with 1-octanol.