濡壁式分子蒸溜分別に関する物質移動

二大成分群系としてのまっこう鯨脳油を試料として

抄録

Separation process of falling-film molecular distillation has been clarified through the study of mass transfer in distilland film, and a theoretical solution for the case where volatilities of components greatly differ from each other has been derived. The variation of concentration of light component within liquid film is given by Eq. (3), and the distillation rate of both light and heavy components at any cycle, by Eqs. (6) and (8).
An experiment was conducted in the molecular distillation of sperm oil, using the apparatus shown in Fig. 1. On the supposition that this oil was of two groups of components, -wax and glyceride-, the results obtained by calculation, employing the above-mentioned Equations, were compared with the experimental results as shown in Table 2. It was proved that there was satisfactory agreement between the two. Based on this, it has been concluded that these Equations sufficiently explain the falling-film molecular distillation in binary system or two-group system.
By making use of the Equations obtained, some considerations have been given to the effect on the distillating capacity of the apparatus (diameter and length of the column) and operating conditions (flow rate, temperature and repeated cycle), and also to the determination of the appropriate condition when the molecular distillation of this type is employed.