Maria A. Berchiesi

Supercooling phenomena in the binary systems: Acetamide-electrolytes

This paper presents a final discussion on studies of solutions of electrolytes in molten acetamide. These studies deal with cryoscopic and ultrasonic (by shear waves) techniques and reveal the complexity of the behaviour of these systems due to strong ion-solvent interactions.ZusammenfassungDie über Lösungen von Elektrolyten in geschmolzenem Acetamid ausgeführten Untersuchungen werden diskutiert. Diese Untersuchungen erstrecken sich auf kryoskopische und Ultraschall-Methoden und vermitteln ein Bild von der durch starke Ionen-Lösungsmittel-Wechselwirkungen bedingten Komplexität des Verhaltens dieser Systeme.РезюмеПредставлено обсужд ение исследований растворов электроли тов в расплавленном ацетамиде. Исследова ния проводились крио екопическим и ультразвуковым мет одом, показавшие сложное п оведение этих систем из-за сильных взаимодейст вий типа ион-раствори тель.

The miscibility gaps in monocarboxylic-dicarboxylic aliphatic acid mixtures

The characteristics of the eutectic points and of the miscibility gaps are submitted for binary systems composed of margaric, palmitic or pentadecanoic acid as one component and succinic, glutaric or adipic acid as the other.

Interchange free energy between COO and CH3 or CH2 groups from liquid-solid equilibrium temperatures in binary systems: Alkane + ester

Abstract The liquid-solid equilibrium temperatures in the n -tetracosane + methyl octadecanoate, methyl nonadecanoate or ethyl octadecanoate binary systems are determined in order to obtain the interchange parameters between CH 3 or CH 2 and COO groups, by means of the statistics of group interaction.

The liquid-liquid and liquid-solid equilibria in some binary systems containing alkali metal stearates

The characteristics are submitted of the crystallization curves of binary systems composed of sodium or potassium stearate as one component and succinic, glutaric, adipic, pimelic, suberic or azelaic acid as the other.

A correlation between the extension of the miscibility gaps and the nature of the components in some binary systems

The liquid-liquid equilibrium regions in binary systems, one component of which is a dicarboxylic aliphatic acid, are examined by the linear equation in (x1/x′1)=a+bT. Theb term is plottedvs. the difference of polar character and one graph is obtained for the different systems.