Distribution of hydrochloric acid between tri-n-butyl phosphate and water

The distribution of hydrochloric acid between water and 40 vol.-% solutions of tri-n-butyl phosphate (TBP) in six diluents and also between water and 20. 40 and 60 vol.-% solutions of TBP in odourless kerosene and pure TBP at 20°, 30° and 50° has been studied to find the effects of temperature, diluent and TBP concentration on the extractability of hydrochloric acid and on third-phase formation.