2. Release the lower layer: after observing the layering of butyl acetate and tert-butanol, release the lower layer of tert-butanol, leaving butyl acetate in the upper layer.
3, extraction: in order to get the tert-butanol separated from the acetate butyl ester, another solvent can be used for extraction. Choose a solvent that is soluble with both butyl acetate and tert-butanol, such as methanol or ethanol. Add this solvent to the butyl acetate, mix thoroughly and then leave to stratify again.
4, washing: the upper layer of butyl acetate slowly poured into a clean beaker, and then add the appropriate amount of water for washing. The water can wash away the residual tert-butanol in the butyl acetate.
5, drying: after washing, remove the water in the butyl acetate by means of desiccant or dry distillation to get dry butyl acetate.