Thermal analysis of binary and ternary systems of salicylic acid,sodium salicylate and sodium hydrogen carbonate |
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Authors: | A Radecki M Weso?owski |
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Institution: | (1) Institute of Chemistry and Analytics, Medical Academy, 80-416 Gda ks, Poland |
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Abstract: | The thermal decompositions of binary and ternary systems of salicylic acid, monosodium salicylate, disodium salicylate and sodium hydrogen carbonate were studied by thermogravimetry and differential thermal analysis. The possibility was shown of analyzing systems involving components which react with each other upon heat treatment. Use can be made of results of this work to follow the course and extent of the reaction employed in the commercial method of manufacturing sodium salicylate and to check declared compositions of salicylate mixtures.
Zusammenfassung Die thermische Zersetzung binärer und ternärer Systeme, die Salicylsäure, Mononatriumsalicylat, Dinatriumsalicylat und Natriumhydrocarbonat enthalten, wurde untersucht. Die Möglichkeit der Analyse von Systemen, deren Komponenten bei Hitzebehandlung miteinander reagieren, wurde gezeigt. Die Ergebnisse dieser Arbeit gestatten den Verlauf und das Ausmaß der Reaktionen zu untersuchen, welche bei dem Herstellungsverfahren von handelsüblichen Natriumsalicylat ablaufen und die deklarierte Zusammensetzung von Salicylatmischungen zu prüfen.
Résumé Etude par thermogravimétrie et analyse thermique différentielle de la décomposition thermique de systèmes binaires et ternaires constitués d' acide salicylique salicylate monosodique, de salicylate disodique et d'hydrogénocarbonate de sodium. On montre la possibilité d'analyser des systèmes dont les composants réagissent entre eux lors du traitement thermique. Les résultats de cette étude permettent de suivre le déroulement et le degré d'avancement de la réaction utilisée dans le procédé commercial de fabrication du salicylate de sodium et de contrôler la composition déclarée des mélanges de salicylates.
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![iecy](/content/n6515k03467l072w/xxlarge1077.gif) ![rcy](/content/n6515k03467l072w/xxlarge1088.gif) ![kcy](/content/n6515k03467l072w/xxlarge1082.gif) ![pcy](/content/n6515k03467l072w/xxlarge1087.gif) ![rcy](/content/n6515k03467l072w/xxlarge1088.gif) ![iecy](/content/n6515k03467l072w/xxlarge1077.gif) ![dcy](/content/n6515k03467l072w/xxlarge1076.gif) ![pcy](/content/n6515k03467l072w/xxlarge1087.gif) ![ocy](/content/n6515k03467l072w/xxlarge1086.gif) ![acy](/content/n6515k03467l072w/xxlarge1072.gif) ![gcy](/content/n6515k03467l072w/xxlarge1075.gif) ![acy](/content/n6515k03467l072w/xxlarge1072.gif) ![iecy](/content/n6515k03467l072w/xxlarge1077.gif) ![mcy](/content/n6515k03467l072w/xxlarge1084.gif) ![ocy](/content/n6515k03467l072w/xxlarge1086.gif) ![gcy](/content/n6515k03467l072w/xxlarge1075.gif) ![scy](/content/n6515k03467l072w/xxlarge1089.gif) ![ocy](/content/n6515k03467l072w/xxlarge1086.gif) ![scy](/content/n6515k03467l072w/xxlarge1089.gif) ![tcy](/content/n6515k03467l072w/xxlarge1090.gif) ![acy](/content/n6515k03467l072w/xxlarge1072.gif) ![vcy](/content/n6515k03467l072w/xxlarge1074.gif) ![scy](/content/n6515k03467l072w/xxlarge1089.gif) ![acy](/content/n6515k03467l072w/xxlarge1072.gif) ![lcy](/content/n6515k03467l072w/xxlarge1083.gif) ![icy](/content/n6515k03467l072w/xxlarge1080.gif) ![tscy](/content/n6515k03467l072w/xxlarge1094.gif) ![icy](/content/n6515k03467l072w/xxlarge1080.gif) ![lcy](/content/n6515k03467l072w/xxlarge1083.gif) ![acy](/content/n6515k03467l072w/xxlarge1072.gif) - ![ncy](/content/n6515k03467l072w/xxlarge1085.gif) ![scy](/content/n6515k03467l072w/xxlarge1089.gif) ![mcy](/content/n6515k03467l072w/xxlarge1084.gif) ![iecy](/content/n6515k03467l072w/xxlarge1077.gif) ![scy](/content/n6515k03467l072w/xxlarge1089.gif) ![iecy](/content/n6515k03467l072w/xxlarge1077.gif) .
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