Abstract
The solubility of NaCN and Na2CO3 in the water–ethanol mixture was determined through experiments. Also the polynomial fit was used to lead to the relationship between the solubility of NaCN/Na2CO3 and the solvent composition. In the meantime, the solvent molecular-electrolyte pair interaction parameters of electrolyte NRTL (eNRTL) model were estimated by using the data regression function of Aspen Plus software from solubility data of NaCN and Na2CO3 in water–ethanol mixed solvent. The process simulation for separation and purification of NaCN and Na2CO3 in water–ethanol mixed solvent was carried out by using Aspen Plus software. During the simulation, electrolyte equilibrium system in water–ethanol mixed solvent was observed by using eNRTL model property method, and the influence of several factors on the separation efficiency of NaCN was examined.
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