二元有机混合液体闪点的实验研究

纯物质的闪点一般可通过查取文献获得,混合物的闪点则很难查到。由于混合液体在实际生产中有着广泛的应用,因此,掌握混合液体闪点的变化规律对于其在生产、储存和使用场所中的风险评估有重要意义。文中采用MINIFLASH FLPL全自动闪点测试仪,对由16种纯物质(包含醇类、酸类、酯类、酮类、醚类、烷烃类)组成的14组不同组成和配比的二元混合液体(含完全互溶和部分互溶)的闪点进行实验研究。用图示法分析了不同研究体系的二元有机混合物其闪点随配比和组分变化的经验规律,将二元混合液体闪点的变化规律大致划分为4类,并对每一类的闪点变化特征和机理进行了探讨。研究结果不仅为工程上提供了二元混合液体闪点的可靠实验数据,还为混合液体在生产、储存和使用过程中的火灾风险评估与安全管理提供了重要参考。

Experimental study on flash points of binary organic mixtures

The flash point data for a pure substance can be obtained from the literature,but for a variety of liquid mixtures,the flash point data are scarce and sometimes unavailable.Liquid mixtures are widely used in industrial processes,so grasping the variation of the flash point of mixed liquids is of great significance for risk assessment in the process of production,storage and transport.The flash points of 14 groups of binary organic mixtures(including miscible and partially miscible binary pairs) with different components and volume ratios composed of 16 kinds of pure substances(including alcohols,acids,esters,ketones,ethers,alkanes) were measured by the MINIFLASH FLPL fully automatic flash point tester.The regularity of the flash points changing along with the components and the volume ratios was analyzed by diagrammatic method,and the variation of the binary liquid mixture flash point was roughly divided into four categories,the flash point change characteristics and mechanism for each of them were discussed.The research results not only provide reliable experimental flash point data of binary liquid mixtures for the project,but also provide a significant reference for fire risk assessment and safety management in the process of production,storage and use of mixing liquids.