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Flash point of binary mixtures of chlorinated hydrocarbons with toluene and their predictability with existing mixing rule

机译：用甲苯的氯化烃的二元混合物闪光点及其与现有混合规则的可预测性

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摘要

The flash points of binary mixtures of toluene with two chlorinated hydrocarbons (tri-chloroethylene and dichloromethane) at different concentrations were investigated to evaluate their predictability by existing mixing rules. Measurements were performed using both open and closed cup flash point testers highlighting complex ignition phenomena. Beyond a certain level of concentration in chlorinated compound, no proper flash is observed, in our test conditions when the flame is presented, but specific behaviors are observed that did not allow the definitive determination of a flash point. The observed phenomena can be attributed to the formation of halogenated radicals, presenting flame-retardant behaviors, by decomposition of the chlorinated vapors at the contact of the flame. Existing mixing rules are based on the consideration of the vapor-liquid equilibrium defining the amount of flammable vapors above the liquid surface. So, the application of such mixing rule failed predicting this specific phenomenon, more likely related to a specific reactivity problem. This work also confirms that the sole consideration of the flash point to investigate the flammability of such mixtures may lead to an underestimation of their actual hazard. Additional experimental tests should be conducted to investigate deeper the flammability of such liquid mixtures.
机译：研究了在不同浓度下用两种氯化烃（三氯乙烯和二氯甲烷）的甲苯的闪点进行研究，评价其现有混合规则的可预测性。使用开放和封闭的杯闪点测试仪突出复杂点火现象进行测量。除了氯化化合物中的一定程度的浓度之外，在呈现火焰时，在我们的测试条件下，观察到没有适当的闪光，但观察到特定行为不允许确定闪点的确定确定。观察到的现象可以归因于形成卤化自由基，通过在火焰接触处的氯化蒸汽的分解中呈现阻燃行为。现有的混合规则基于对液体表面上方易燃蒸汽量的蒸汽液平衡的考虑。因此，这种混合规则的应用失败预测该特定现象，更可能与特定的反应性问题有关。这项工作还证实，刷新点对待这种混合物的易燃性的唯一考虑可能导致对实际危害的低估。应进行另外的实验试验以更深地进行这种液体混合物的易燃性。

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  • 来源
    《Process safety progress》 |2020年第3期|1.1-1.7|共7页
  • 作者

    Guillaume Fayet; Benoit Tribouilloy; Patricia Rotureau;

  • 作者单位

    Institut National de I'Environnement Industriel et des Risques (Ineris) Parc Technologique Alata Verneuil-en-Halatte France;

    Institut National de I'Environnement Industriel et des Risques (Ineris) Parc Technologique Alata Verneuil-en-Halatte France;

    Institut National de I'Environnement Industriel et des Risques (Ineris) Parc Technologique Alata Verneuil-en-Halatte France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    chlorinated solvents; flash point; mixtures; UNIFAC;

    机译：氯化溶剂;闪点;混合;unifac.;

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