engleski

Drying of pentaerythritol obtained from batch crystallization

Present work was aimed at investigating the kinetics of vacuum drying of pentaerythritol obtained by batch crystallization from the aqueous solution. Quality of the crystals dried after rinsing with ethanol and acetone was analysed, and then compared with the data obtained from the unrinsed crystals. Drying was carried out in the laboratory vacuum dryer under different pressures and temperatures. The experimentally obtained drying curves were successfully approximated by the two-parameter Page’s model. Parameters, k and n, of the mathematical model were correlated with the process conditions. The parameter k grew with the increasing drying rate. The parameter n was influenced by the type of the solvent being removed. It decreased with the increase of the solvent‘s boiling point.

crystallization ; drying ; kinetics

Special Issue: Industrial Crystallization