Calculation of Distillation Refining of a Substance Containing Low and Highly Volatile Impurities

Аннотация

This paper considers the distillation refining of a material containing highly volatile and low-volatile impurities and demonstrates the possibility of evaluating the fraction of residue, g_r, during the removal of the highly volatile impurity and the degree of subsequent distillation, g_c, necessary for achieving a predetermined decrease in impurity concentrations at a predetermined product yield and known separation factors. Examples are presented for the distillation in real host–impurity systems: Ga–(Pb,Al), Be–(Al,Fe), and Cr–(Si,Fe).