Solvents screening experiments using a Soxhelt extractor wereconducted to determine the best solvents for oil removal from spentbleaching clay. The solvents extracted oil in the followingdecreasing amount: methylethylketone>benzene-ethanol mixture(1:1 byvolume)>acetone>trichloroethylene =dichloromethane>chloroform>petroleum ether>benzen>n-hexane>methanol.Four of the safest solvents, methylethylketone acetone, petroleumether and n-Hexane were selected for further studies. Large scaletreatment of spent clay with the selected solvents were conducted ina batch stirred reactor.
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