Extraction performance of two-phase aqueous system of mixed surfactants sodium dodecyl benzene sulfonate and tetradecyl trimethyl ammonium chloride

The phase region,extraction performance and microstructure of two-phase aqueous system of mixtures of sodium dodecyl benzene sulfonate(SDBS) and tetradecyl trimethyl ammonium chloride(TTAC) were researched.Results show that the mixed aqueous solution of SDBA and TTAC forms stable two-phase regions at 30 ℃.Resultant two-phase aqueous system can extract and separate methylene blue and isatin at 30 ℃ to a certain degree.This is because the upper and lower phases of the two-phase aqueous system have much different microstructure,allowing the formation of stable two-phase aqueous system with a certain degree of extraction and separation performance.