Based on the results obtained in the investigation for cyclohexane recovery by extractive distillation with single solvent

and the Wsy-1 mixed solvent was experimentally studied.The effects of cyclohexanol concentration in solvent

cyclohexane concentration in feed and solvent-to-feed ratio on relative volatility were investigated. The relative volatility of n-heptane/cyclohexane was increased from 0.661 to 1.11

and that of 2

3-dimethylpentane/cyclohexane increased from 0.84 to 1.21 at the Wsy-1 solvent-to-feed ratio of 7∶1. The cyclohexane purity and recovery were 98.5% and 80%

respectively

when a feed stream consisting of 85% cyclohexane was introduced to the experimental extractive distillation column operating at the reflux ratio of 10.