Stable Alkanol Dispersion to Reduce Evaporation

by Gary W. Frasier,
Lloyd E. Myers,

Serial Information: Journal of the Irrigation and Drainage Division, 1968, Vol. 94, Issue 1, Pg. 79-90

Document Type: Journal Paper


Highly stable sol- or gel-type dispersions of long-chain alkanols in water have been prepared and shown to be more effective than powdered alkanol in reducing evaporation from water surfaces. Surfactants used to prepare the dispersions are algicides and bactericides. Dispersion samples have shown no separation or deterioration after 5 yr storage under nonsterile conditions. Concentrated dispersions can be prepared for shipment or storage and can be diluted with water containing up to 1,700 ppm soluble salts to make stable, low-viscosity dispersions for application with simple drip-type applicators. Film release rates and film pressures from dispersions exceed those from powder. Fifty pounds of powdered alkanol per acre per month reduced evaporation from outdoor tanks by 15% under adverse testing conditions. Under the same conditions only 10 lb of dispersed alkanol per acre per month reduced evaporation by 28%.

Subject Headings: Evaporation | Water storage | Salt water | Water surface | Surface-active agents | Pesticides | Bacteria | Deterioration

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