SIMULATION OF MOLECULAR-IODINE EXTRACTION BY RED-4 (DEAROMATIZED DILUENT FOR EXTRACTION)

A regression equation was constructed providing adequate description o f iodine distribution between organic and aqueous phases as a function of their volume ratio. In recovery of iodine from aqueous solutions c ontaining 20-120 mg/l of iodine with extraction diluent RED-4 the opti mal volume ratio between the organic and aqueous phases is within the range (1:3)-(1:4). For centrifugal extractor the extraction efficiency (the ratio between the theoretical and real numbers of the extraction stages) is 0.42+/-0.03. Correlation between the real number of extrac tion stages and the fraction of iodine retained in the aqueous phase ( degree of iodine recovery) is described by the power function with neg ative exponent.