Preparation method of synthetic 1,4-butynediol catalyst

The invention discloses a preparation method of a synthetic 1,4-butynediol catalyst. The preparation method comprises the following preparation steps of (1) preparing a copper and silicon mixed solution, a copper and bismuth mixed solution, a precipitant solution I and a precipitant solution II; (2) dripping the precipitant solution I into the copper and silicon mixed solution, so as to obtain copper and silicon precipitate slurry; (3) adding the copper and bismuth mixed solution into the copper and silicon precipitate slurry, wherein the usage amount of copper is the left copper amount; (4) compared with a precipitation condition in step (2), under the condition of lowering the reaction temperature by 5 to 30 DEG C, dripping the copper and bismuth mixed solution containing the copper and silicon precipitate into the precipitant solution II; (5) filtering a material, and adding a proper amount of distilled water; (6) spraying and drying the slurry, and calcining, so as to obtain the catalyst for producing synthetic 1,4-butynediol. The preparation method has the advantages that the particles of the catalyst are uniform, and the loss possibility in a use process is small; the preparation method of the catalyst is simple, the implementing is easy, and the repeatability is good.