Benzyl alcohol is an aromatic alcohol. It is a useful diluent due to its high polarity. The extraction of SA was performed using TOA in the active diluents like benzyl alcohol, 2-Octanol, and 1-Decanol. Here in this study polar diluents were used because its forms hydrogen bond to extract SA. The effect of diluent on distribution of acid observed in Figure . The initial concentration was ranges from 0.14 mol/kg to 0.5 mol/kg. shows the chemical equilibrium distribution coefficient of SA by using TOA with given diluents. Benzyl alcohol gives a higher distribution coefficient as compare to 1-decanol and 2octanol. The highest value of 𝐾 𝐷 was obtained 178 for benzyl alcohol at initial succinic acid concentration 0.26 mol/kg. For 2-octanol and 1-decanol the highest 𝐾 𝐷 value was obtained 23.19 and 21.51 respectively at initial acid concentration 0.14 mol/kg. For all these batches of the initial concentration of TOA maintained at 0.57 mol/kg.