Temperature-concentration oscillations of crystal-solution phase equilibria in the presence of trace impurities of surface-active agents
作者： E. V. Kiryanova
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摘要: Using the examples of aqueous salt solutions NaNO3, KNO3, RbNO3, K2SO4, NaBr·2H2O, KBr, and NH4NO3, it was experimentally proven that new phenomena, i.e. temperature-concentration oscillations crystal-solution phase equilibria detected previously in range 15–45 °C remain presence trace impurities (10-4–10-3 wt. %) ion-active organic matters. The signs breaks transformation into pair “maximum-minimum” type are established for NaBr, KBr solutions. efficiency influence on sharply rises areas (the saturation temperature ranges up to 10 K). impurity is promoted by amides its content (as compared with sulphates) an increase length hydrocarbon radical. phenomenon absent case addition ion-inactive compounds. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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