This report covers part of experiments which have been carried out to elucidate the foundamental properties of isotllermal evaporation at 110°C for the natural gas brine and the ion-exchange membrane brine. In these experiments, the isotherms and invariant pohlts at 110°C of the ternary system KCl-MgCl
2-H
2O and the quaternary system KCI-MgCl
2-CaCl
2-H
2O were obtained.
As are sult, it was found that for the ternary system KCI-MgCl
2-H
2O, the values of the isotherms became greater in similar formsas temperature rose, that is, at 50°C, 75°C, and 110°C, and that the values of potassium chloride and magnesium chloride of the invariant points were greater likewise.
In the case of the quaternary system KCl-MgCl
2-CaCl
2-H
2O, it was found that the values at the invariant points T, V, amd W for potassium chloride and magnesium chloride increased but thevalues for calcium chloride decreased. However, as for V at 75°C and U
1 and U
2 at 110°C, the value for potassium chloride proved to be decreased, whereas that for magnesium chloride proved to be increased. In the case of calcium chlofide, value at U
1 was decreased, and the value at U
2 was increased. As temperature rose, the crystallization region of the double salt CaCl
2·KCl became larger, where as that of MgCl
2·6H
2O was much smaller.
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