Many authors use amine extractants for the carboxylic acid recovery because amine provides the high yield and selectivity to extract selective acid . Primary amines have large solubility in water as well as secondary amines produces amide after extraction, hence tertiary and quaternary amines mostly preferred. But regeneration of quaternary amine is not easy, thus tertiary amines widely used for recovery of acid from its aqueous phase . Although the tertiary amines have advantages like good extractability and high distribution coefficient, they have some disadvantages like high viscosity and its high corrosiveness property. To recover these disadvantages, amines always used with diluents. Researchers investigates the extraction equilibrium of succinic acid from aqueous solutions with tertiary amines. In their work, they used various tertiary amines like TPA, TBA, TpeA, and TOA along with active and inactive diluents like 1-octanol and n-heptane. The extraction power gets increases when 1-octanol used as diluent as compare to n-heptane. Thus, active diluents like alcohol, ketones, and chlorinated hydrocarbon were successfully used to extract succinic acid. Depending on the polarity of organic phase the reaction mechanisms between solute and extractant get varied that ultimately effect on extraction efficiency .