Effect of mixing on the crystal size distribution of borax decahydrate in a batch cooling crystallizer |
| |
Authors: | Marija Akrap Nenad Kuzmanić Jasna Prlić-Kardum |
| |
Affiliation: | 1. University of Split, Faculty of Chemistry and Technology, Teslina 10/V, 21000 Split, Croatia;2. University of Zagreb, Faculty of Chemical Engineering and Technology, Maruli?ev trg 19, 10000 Zagreb, Croatia |
| |
Abstract: | The effect of the impeller speed upon the metastable zone width, supersaturation level, crystal growth and the crystal size distribution of borax decahydrate have been investigated to find operating conditions of a batch cooling crystallizer. The importance of impeller speed was studied in baffled stirred crystallizer with a volume of about 2 dm3, equipped with four straight blade turbine (4-SBT) cooling at a constant cooling rate. The metastable zone width was determined by visual method, while concentration changes during the process were monitored in line using ion-selective electrode. The crystal size distribution was determined by optical microscope and sieve analysis respectively. The power consumption measurements were performed for all impeller speeds examined as well. On the basis of the experimental results and observations it is evident that in an agitated batch crystallizer the above mentioned parameters are significantly influenced by hydrodynamic regime in the system determined by impeller used and its revolution speed. |
| |
Keywords: | A1. Solubility A1. Stirring A2. Growth from solution A2. Industrial crystallization B1. Borates |
本文献已被 ScienceDirect 等数据库收录! |
|