PPROBLEM TO BE SOLVED: To provide an outflow oil-treating agent that is very friendly not only to an ecosystem but also to environments including a water circulation system on the earth, exhibits excellent performances for dispersing highly viscous fuel oil C and stably disperses heavy oil after emulsified. PSOLUTION: The outflow oil-treating agent comprises a polyglyceryl fatty acid ester (A) having an HLB of at least 7 and a hydrocarbon solvent (B). PCOPYRIGHT: (C)2008,JPO&INPIT
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