Flavours can be extracted from seeds through solvent extraction in a batch-stirred vessel. Consider that solute diffusivity in the solid is 1.0 x 10-10 m 2 .s-1 and the concentration distribution ratio of the solute is 2. Calculate the time for 80% of the solute to be removed, assuming that the seeds are spherical, with an average particle diameter of 4.0 mm, and the solid-to-liquid volume ratio is 0.25?

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