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Vapor–liquid equilibrium pressure of ethanolamine hydrochloride, and vapor–solid equilibrium pressure of methylamine, pyridine, and trimethylamine hydrochlorides by thermogravimetric method
Brazilian Journal of Chemical Engineering ( IF 1.5 ) Pub Date : 2021-02-23 , DOI: 10.1007/s43153-020-00086-y
Anne C. Belusso , Maria Lina Strack , Guilherme P. M. da Silva , Rafael de P. Soares , Paula B. Staudt

In this work, vapor–liquid and vapor–solid equilibrium pressure and enthalpies of amine hydrochlorides were determined using a thermogravimetric method. Ferrocene was used as the reference compound to determine the calibration constant k. Then, ammonium bromide, ammonium chloride and benzoic acid were used for testing the k-ferrocene. Experimental vapor–solid equilibrium pressure of methylamine hydrochloride obtained in this study showed good agreement with recent literature data. For the other substances investigated, ethanolamine hydrochloride, pyridine hydrochloride, and trimethylamine hydrochloride, no reliable equilibrium data is available in the open literature. Among these substances, ethanolamine hydrochloride was found to be the less volatile, followed by methylamine, trimethylamine, and pyridine hydrochloride. Regarding the equilibrium enthalpies found in this work, all salts have shown a similar value. This can be explained by the similar reaction (dissociation) that takes place for these substances.



中文翻译:

热重法测定乙醇胺盐酸盐的汽液平衡压力和甲胺,吡啶和三甲胺盐酸盐的气固平衡压力

在这项工作中,使用热重法确定了汽-液和汽-固平衡压力以及胺盐酸盐的焓。二茂铁用作参考化合物以确定校准常数k。然后,使用溴化铵,氯化铵和苯甲酸测试k-二茂铁。在这项研究中获得的实验性甲胺盐酸盐的气固平衡压力与最近的文献数据吻合良好。对于所研究的其他物质,乙醇胺盐酸盐,吡啶盐酸盐和三甲胺盐酸盐,公开文献中没有可靠的平衡数据。在这些物质中,发现乙醇胺盐酸盐的挥发性较小,其次是甲胺,三甲胺和吡啶盐酸盐。关于在这项工作中发现的平衡焓,所有盐都显示出相似的值。这可以通过这些物质发生的类似反应(离解)来解释。

更新日期:2021-02-23
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