抄録
Part 1. Boiling Point Raising of Sea Water Brine.
Several boiling point apparatuses each with a built-in Cottrel boiler and a boiling point apparatus of pure water were attached to a manostat capable of controlling pressure from the atmospheric down to 100 mm. Hg. and the temperature of the both kinds of boiling apparatuses were read off using copperconstantan thermocouples while the apparatuses were running steady. From the data obtained Diihring lines Were drawn the slopes of which are shown in Fig. 1. In Fig. 2 B.P.R. versus total chlorine (or equivalent to concentration ratio) are given for four pressures of 100,300,500, and 760 mm. Hg. In Fig. 3. influence of pressure is given for various lines of constant total chlorine.In Fig. 4. results of other workers on the subject are compared with the present data.
Part2. Degree of Salt Formation during Evaporation.
Using similar apparatusesbut with devices for drawing off of pure mother liquor while running for the purpose of obtaining samples for analysis, degrees of formation of both NaCl and gypsum crystals were determined. NaCl begins to crystalize out at (Cl-) T= 150 and the whole course is shown in Fig. 5. In Fig. 6. Similar curve is given for gypsum which starts at (Cl-) T=70 and quickly reaches 35%. Fig. 7. shows chlorine and sulfate ion concentrations of mother liquor during evaporation concentration.
