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A non-ideal model for predicting the effect of dissolved salt on the flash point of solvent mixtures.

Authors
  • Liaw, Horng-Jang
  • Wang, Tzu-Ai
Type
Published Article
Journal
Journal of Hazardous Materials
Publisher
Elsevier
Publication Date
Mar 06, 2007
Volume
141
Issue
1
Pages
193–201
Identifiers
PMID: 16908098
Source
Medline
License
Unknown

Abstract

Flash point is one of the major quantities used to characterize the fire and explosion hazard of liquids. Herein, a liquid with dissolved salt is presented in a salt-distillation process for separating close-boiling or azeotropic systems. The addition of salts to a liquid may reduce fire and explosion hazard. In this study, we have modified a previously proposed model for predicting the flash point of miscible mixtures to extend its application to solvent/salt mixtures. This modified model was verified by comparison with the experimental data for organic solvent/salt and aqueous-organic solvent/salt mixtures to confirm its efficacy in terms of prediction of the flash points of these mixtures. The experimental results confirm marked increases in liquid flash point increment with addition of inorganic salts relative to supplementation with equivalent quantities of water. Based on this evidence, it appears reasonable to suggest potential application for the model in assessment of the fire and explosion hazard for solvent/salt mixtures and, further, that addition of inorganic salts may prove useful for hazard reduction in flammable liquids.

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