The reactive extraction equilibria for aqueous solutions of glutaric acid, with trioctylmethyl ammonium chloride (Aliquat 336) in various diluents, including 3-methyl-butan-l-ol, octan-1-ol, nonan-1-ol, decan-1-ol, methyl ethyl ketone, 2,6-dimethy1-4-heptanone, hexan-2-one, toluene, kerosene, and hexane, were determined at various Aliquat 336 (A336) concentrations. Experimental results of batch extraction experiments are calculated and reported as distribution coefficients (K(D)), loading factors (Z), and extraction efficiency (E). All measurements were carried out at 25 degrees C. 2,6-Dimethyl-4-heptanone was found to be the most effective diluent with the highest value of K(D) (8.51) for the glutaric acid + Aliquat 336 extraction system. The effect of pH has been investigated for octan-1-ol + A336 on glutaric acid extraction in the range of pH 2 to 8. The linear solvation energy relationship (LSER) model has been used to fit the experimental data.