Triacetin production method: Triacetin is a colorless, odorless, oily liquid that is miscible with ethanol, ethyl ether, chloroform and benzene, and slightly soluble in water and carbon disulfide. Used as cigarette filter binder and perfume fixative, solvent, toughening agent. And can be applied to cosmetics, casting, medicine, dyes and other industries. This product is non-toxic and non-irritating. Triacetin is derived from the esterification of glycerol with acetic acid. After glycerol is preheated to 50-60°C, acetic acid, benzene and sulfuric acid are added. The mixture was heated and refluxed and dewatered. After the dehydration, the benzene was recovered, then acetic anhydride was added and the mixture was heated for 4 hours. After cooling, the pH was neutralized with 5% sodium carbonate to 7. The aqueous layer was separated and the crude oil was dried over calcium chloride. Vacuum distillation, collecting 128-131 ° C (0.93kPa) fraction, namely triacetin.