Investigation of the extraction of milk acid (lactic acid) with environmentally friendly vegetable solvents and amines

I this study, the separation of lactic acid, which is widely used in many industries, especially in the dairy sector, from its aqueous solutions using trioctylamine (TOA) reactant and environmentally friendly vegetable solvents was investigated. It is aimed to determine the most suitable reactant / solvent ratios with reagent extraction analyzes. As a result of the studies, thermodynamic values such as extraction efficiency, loading factor and dispersion coefficient were calculated. According to the results of the research, it was determined that the addition of TOA to the organic phase increases the extraction efficiency in the recovery of carboxylic acids from aqueous solutions. For rice bran, the yield was 4.45% in physical extraction, while the yield increased up to 74.54% in reactive extraction. For rice bran, an increase in yield of approximately 16 times was observed. As a result of the data obtained, it was observed that the dispersion coefficient values increased and the loading factor values decreased with the increase in the extractant concentration. For lactic acid extraction, when the organic phase mixtures created with extractant and diluent combinations were examined, it was determined that the best results in terms of extraction efficiency were obtained when an average of 3.57 ml TOA was used.