Diethylene glycol butyl ether acetate has a very high boiling point, mainly used in high temperature porcelain and printing ink high boiling point solvent, also used as a bonding agent of latex paint. Due to the slow volatilization of the solvent, at 20℃, the solubility in water is 65g/L [2], so it can be used as the solvent of screen printing ink, as well as the solvent of polystyrene coating printing glaze. Can also be used as an azeotrope for alcohol and ketone separation.