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.