Thermal Decomposition Studies of Sodium and Potassium Tartrates
In a previous publication on the thermal decomposition of hydrated and deuterated Rochelle Salts (1), a mechanism was proposed to explain the observed thermal data that involved assumptions of the thermal decomposition of both sodium and potassium tartrates. This study showed that endothermic transitions were obtained in the temperature ranges of 108–125°C, and 158-l80°C, which were attributed to the dehydrations of sodium and potassium tartrates, respectively. Also, the weight losses obtained at 250°C were attributed to the decomposition of the tartrates to the oxalates with the deposition of carbon. A search of the available literature showed that Mattu and Pirisi (2) published the only previous paper on the alkali tartrates. They presented DTA thermograms of sodium and potassium tartrates, but the data was not sufficient to permit the analysis of the thermal decomposition of these compounds. It is, therefore, the purpose of this paper to study the thermal decompositions of sodium and potassium tartrates by modern thermoanalytical techniques (DTA and TGA), and to relate these studies to the previous investigation of the Rochelle Salts.
KeywordsThermal Decomposition High Activation Energy Percent Weight Loss Endothermic Transition Potassium Tartrate
Unable to display preview. Download preview PDF.