Method for preparing 1,1,1-trifluoroacetone

The invention discloses a method for preparing 1,1,1-trifluoroacetone, which is used for preparing the 1,1,1-trifluoroacetone by reacting 4,4,4-trifluoroethyl acetoacetate and organic acid in an anhydrous state. Compared with the prior art, the method overcomes the risk in exploding trifluoroacetone hydrate easily generated in a water reaction environment in air, and has a safe and reliable production process; meanwhile, both the product purity and the yield are higher; furthermore, the organic acid as a raw material can be recycled; the method is low in three-waste pollution, low in production cost and simple to operate; and the prepared 1,1,1-trifluoroacetone can be used for producing a plurality of important fine chemical intermediates.