Extraction experiments on liquid membrane permeation were conducted in a batch stirred vessel to separate aromatics from an aromatics-nonaromatics binary mixture as an inner oil phase in the emulsion. The investigations were conducted under various material systems (hydrocarbon feeds, aqueous membrane phases) and the mass transfer coefficient in the emulsion (dispersed phase) was measured. Independently of the system of hydrocarbon feed and aqueous membrane solution, the mass transfer coefficient of the dispersed phase could be correlated with the dimensionless stirring time and the solubility of the aqueous membrane phase. The batchwise results agree fairly well with previous results reported for continuous operation.