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Development and Testing of Biosurfactants in Aqueous Metal Cleaning Applications. 1997

Two biosynthesized surfactants were studied in this project; emulsan and sophorolipid. A number of studies and patents have shown emulsan to be an effective emulsifier of oily substances, initially in emulsifying oily residues in oil transport ship hulls and later in personal care products. Sophorolipid has good surface tension-lowering properties and can reportedly be produced at a cost comparable to petroleum-based surfactants. The research described in this report sought to take advantage of the emulsification properties of emulsan and the surface-tension lowering properties of sophorolipid in metal cleaning and degreasing applications.

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