The extraction behavior of single acid of glycolic acid and glyoxylic acid

and their mixture were investigated with TRPO as extractant and MiBK as diluent

and the effect of the concentration of TRPO and solute on the distribution coefficients were measured. The mathematical models describing the extraction equilibrium were proposed based on some assumptions. The experimental results showed that the complexes of glycolic acid with TRPO were in the forms of 1∶1 and 1∶2. The separation factor of glycolic acid to glyoxylic acid increased with TRPO concentration from less than 1 to larger than 1. The models parameters K11 and K12 in the single acid system can be used to predict extraction equilibrium behavior in the mixture acid systems. Finally

the separation conditions using other compounds

Alamine 336 and TBP

as extractant were also discussed.