Flash points of aqueous solutions of flammable solvents

Flash points OF aqueous solutions OFFLAMMABLE Astbury1, J. Bugand-Bugandet2, E. Grollet2and StellAvecia Limited, Box 42, Blackley, Manchester M9 8ZS1 Current address: Health & Safety Laboratory, Harpur Hill, Buxton,Derbyshire, SK17 9JN2 Ecole des Mines d Albi, Campus Jarlard, 81013 Albi, Cedex 09, FranceMany fine chemicals and pharmaceutical intermediates are processed usingflammable solvents which are soluble in water. The disposal of such solutions of sol-vents as waste can be problematical, particularly as dilute aqueous solutions can beexpensive to incinerate. Disposal to an effluent treatment plant can be hazardous ifthe solution is above its Flash point. Hence the availability of the Flash point ofaqueous solutions of flammable solvents would be useful for selecting an appropriatedisposal route. Whilst such data of actual measurements of aqueous solutions arevaluable, a predictive method would also be useful, and the data of three solventshave been compared to simple theoretical models, to allow prediction to be under-taken using readily available spreadsheets or calculating tools, rather than using dedi-cated specialist software for physical property prediction.

component flash-point data readily available in the literature. The approach of using a simple prediction method using the minimum of data is ideal for SMEs who often do not have access to sophisticated physical property data prediction software, and only have access to the open published literature. SYMPOSIUM SERIES No. 150 # 2004 IChemE 1

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