separation toluene from heptane by green solvents

Liquid liquid extraction is one of the most commonly used separation methods for the separation of azeotropic compounds in oil and petrochemical industries, which saves a lot of energy and financial resources over conventional processes such as distillation# in this separation process, the extraction agent must be more soluble for the material (except extractor) than other components in the mixture# therefore, the determination of a suitable extraction factor will be the key to complete separation process, the choice of a suitable key solvent for extraction process# in this project, the solvent of deep eutectic was chosen as a solvent for the extraction of toluene, solvents were mixing choline chloride and tiourea as des1, choline chloride and 1,2-propandiol as des2, the balance data for the heptane + toluene + dess system at a temperature of 298#15 °k and atmospheric pressure were measured# the des extraction capacity is estimated at the isolation of toluene from heptane + toluene mixture using the selective method and the solvent distribution ratio, and the effect of structure and anion on the extraction efficiency with deep eutectic solvent has been investigated# liquid extraction test data were correlated with unifac models#