Method for preparing acetoin by catalyzing selective dehydrogenation of 2, 3-butanediol through copper-based catalyst

The invention discloses a method for preparing acetoin by catalyzing selective dehydrogenation of 2, 3-butanediol with a copper-based catalyst, which is characterized in that the copper-based hydrotalcite catalyst is utilized to catalyze anaerobic dehydrogenation reaction of 2, 3-butanediol in an inert gas atmosphere, and acetoin is generated with high selectivity; the preparation method of the copper-based hydrotalcite catalyst comprises the following steps: dissolving a copper salt, a reducing agent, a magnesium salt and an aluminum salt in a solvent, carrying out coprecipitation in the presence of a precipitator, and washing, drying and calcining a precipitation product to obtain the copper-based hydrotalcite catalyst, and the reducing agent is N2H4. According to the method, the low-copper-loaded copper-based hydrotalcite catalyst is used, and the acetoin can be prepared by catalyzing anaerobic dehydrogenation of 2, 3-butanediol with high selectivity. 本发明公开了一种铜基催化剂催化2,3-丁二醇选择性脱氢制备乙偶姻的方法，利用铜基水滑石催化剂在惰性气体氛围中催