*3.2. Layer Freeze Crystallization Results*

In order to make a comparison between crystal yields and distribution coefficients, the experiments for approximately the same set of five sub-cooling degrees for both aqueous [DBNH][OAc] solutions and both freezing times were carried out (n.b., sub-cooling degrees deviated in range between 0.01 ◦C and 0.09 ◦C). All experimental and calculated data can be found in the Supplementary Material (Tables S2–S5).

The ice yield and distribution coefficient as a function of sub-cooling degree are presented in Figures 8 and 9. Ice crystal yield as a function of sub-cooling temperature shows a similar linear dependence for both freezing times and for both aqueous [DBNH][OAc] solutions. As expected, the greater the sub-cooling degree, the higher the crystal yield is. The distribution coefficients obtained show the separation efficiency of layer freeze crystallization varied between 0.28 and 0.46. The results indicate that the distribution coefficients for both types of solutions are almost independent of crystallization duration, as there are only negligible differences between the values of distribution coefficients obtained at the same level of sub-cooling for the two different freezing times investigated.

**Figure 8.** Ice yield and distribution coefficient of static layer freeze crystallization as a function of sub-cooling degree.

**Figure 9.** Ice yield and distribution coefficient of static layer freeze crystallization as a function of sub-cooling degree.
