摘要
Laboratory-scale experiments were carried out to evaluate the influences of operational parameters on the melt crystallization efficiency for p-cresol purification.The optimal crystallization conditions were determined:dynamic pulsed aeration at 90 L·h-1 and the cooling rate of 0.6-0.8 ℃·min-1,followed by sweating at 0.2-0.3 ℃·min-1 for 40 min.Results also demonstrate that the melt crystallization efficiency is sensitive to feed concentration,which highlights this technology for separation and purification of high purity products.
Laboratory-scale experiments were carried out to evaluate the influences of operational parameters on the melt crystallization efficiency for p-cresol purification. The optimal c.rystallization conditions were determined： dynamic pulsed aeration at 90 L·h-1 and the cooling rate of 0.6 0.8 ℃min^-1, followed by sweating at 0.2-0.3 ℃.min^-1 for 40 min. Results also demonstrate that the melt crystallization efficiency is sensitive to feed concentration, which highlights this technology for separation and purification of high purity products.
基金
Supported by the National Basic Research Program of China (2009CB219905)
Program for Changjiang Scholars and Innovative Research Team in University (IRT0936)
Innovating Fund of Tianjin University
