FLASH POINT OF BINARY MIXED SOLVENTS AND EFFECT ON ITS FORMATION INTERMOLECULAR HYDROGEN BONDS

Binary mixed solvents based on propanol-1 and butanol-1 alcohols were investigated. As a second component of binary solvent polar organic liquids (acetic acid, heptanol, nitrobenzene) and nonpolar (triethanolamine) and 5 % solution of surfactant (sodium dodecyl sulphate) were investigated. The optimum content of the second component in the mixed solvent was 8 %. The greatest effect in increasing the flash point is achieved using acetic acid and heptyl alcohol. When using acetic acid, the temperature raising effect flashes propyl and butyl alcohol was 18,6 and 21,3 %, respectively. This is due to the polarity of the molecules and the ability to form intermolecular hydrogen bonds with the molecules of propanol and butanol. Addition of a 5 % solution of sodium dodecylsulfate resulted in increase of point flash butanol-1 and propanol-1 on 12,2 and 12,5 %. Analysis of experiments with triethanolamine was proved the influence of intermolecular hydrogen bonds on the flash point for polar liquids. The use of mixed solvents allows to reduce fire danger.