Purification of the 2,6-xylenol/m-cresol Mixture by a New Separation Technique Combining Distillation and Crystallization

概要

論文の詳細を見る
A new separation technique, called stripping crystallization (SC), is applied in this work for purification of the 2,6-xylenol/m-cresol mixture. Basically SC combines distillation and crystallization to produce pure crystals due to the three-phase equilibrium. A thermodynamic model is proposed to simulate the three-phase equilibrium conditions during the SC operation. The experiments show that SC can be applied to purify 2,6-xylenol from the 2,6-xylenol/m-cresol mixture while it is rather difficult to purify m-cresol. For purification of 2,6-xylenol, the recovery rate increases with increasing operating pressure while the final purity of the product decreases with increasing operating pressure.