Method for preparing 1,6-adipaldehyde

The invention belongs to the field of synthesis of fine chemicals, and discloses a method for preparing 1,6-adipaldehyde. The method comprises the following steps of: performing an ozonization reaction on cyclohexene serving as a raw material by taking ozone as an oxidant and taking an organic solvent and glacial acetic acid as mixed solvents at the reaction temperature of between 20 DEG C below zero and 10 DEG C to obtain an ozonized reaction liquid, and directly performing a reducing reaction on an ozonide without separating; and reducing and decomposing by adopting zinc powder, and reacting under the protection of nitrogen gas at the room temperature for 0.5-1.5 hours to obtain 1,6-adipaldehyde. Compared with the conventional method, the method has the advantages: ozone is taken as an oxidant, so that high oxidizing capacity and high selectivity are realized, the environmental pollution is low, the requirement of ozonization reaction temperature is low, energy is saved, and consumption is lowered. After reacting, a product is easy and convenient to separate; and zinc acetate is recovered from a water phase by concentrating and crystalizing, so that production cost is lowered, and industrial production is facilitated.