Extraction of alkaline-earth elements by alkylphenol disulfide oligomers

Extraction of microquantities of alkaline-earth elements (M) from chloride solutions using the condensation product of paraisooctylphenol disulfide with formaldehyde (octofor S) (R) depending on pH medium and concentration of extracting agents is studied. Effect of donor-active substances (TBP, TOA, petroleum sulfoxides) (S) on M distribution is considered. The method of equilibrium shift was applied to determine composition of the formed complexes: M:R=1:1 and M:R:S=1:1:1. A possibility of M concentrating by extraction with R oligomer is displayed