Removal of arsenic and antimony from complex lead bullion via vacuum distillation, The
Vacuum distillation is based on the selective evaporation of volatile impurities from liquid melts and has been extensively studied. It is known to provide better operation conditions and a better control of product composition. In order to understand the thermodynamics of vacuum distillation, it is essential to know the activity coefficient of the impurity in the melt. In this research, three thermodynamic models were used to calculate the activity coefficient. The models are the molecular interaction volume model (MIVM), the Wilson equation, and the non-random two liquids (NRTL) model. The ...
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