Abstract

Thermal stability of nitric-acid (0.8–6.6 M) solutions of monoethanolamine (MEA) in the temperature range 90–150°С under atmospheric pressure and pressure exceeding that of the atmosphere (autoclave) has been studied. It was found the interaction of solution components begins at the atmospheric pressure begins at 100–105°С and НNО₃ concentration of 1.4 M and is accompanied by the gas evolution without heat release. When solutions are heated in an autoclave, exothermic reactions appear under certain conditions, with gas evolution the intensity of which depends on the component concentration and temperature. The characteristics of the exothermic processes were determined. It was shown that, because of the sharp pressure buildup in the apparatus as a result of the exothermic reactions, evaporation of nitric-acid solution with MEA may be dangerous as regards the appearance of emergencies.

中文翻译：

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含单乙醇胺的硝酸溶液的热稳定性

摘要

研究了单乙醇胺（MEA）的硝酸（0.8–6.6 M）溶液在大气压和超过大气压（高压釜）的压力下在90–150°С温度范围内的热稳定性。据发现溶液组分的相互作用开始于大气压力开始在100-105°С和НNО ₃气体的浓度为1.4 M，并且伴随气体释放而没有放热。在高压釜中加热溶液时，在某些条件下会发生放热反应，放出气体的强度取决于组分的浓度和温度。确定了放热过程的特征。结果表明，由于放热反应导致设备中压力急剧升高，因此在紧急情况出现时用MEA蒸发硝酸溶液可能很危险。