Method for preparing magnesium-aluminum hydrotalcite by using dialkoxide

The invention provides a method for preparing magnesium-aluminum hydrotalcite by using dialkoxide, and relates to the technical field of synthesis of inorganic non-metallic materials. The preparation method comprises the following steps: carrying out alcohol thermal reaction on a mixed aqueous solution containing aluminum isopropoxide, magnesium isopropoxide and sodium carbonate to obtain magnesium-aluminum hydrotalcite; the pH value of the mixed aqueous solution is more than 7 and less than or equal to 10; the temperature of the alcohol thermal reaction is 120-180 DEG C; in the mixed aqueous solution, the molar ratio of Mg to Al is (1.5-3): 1, and the molar ratio of Mg to Na2CO3 is (6-8): 1. The magnesium-aluminum hydrotalcite is prepared through hydrolysis of bimetallic alkoxide, the reaction temperature is reduced, the product activity of the magnesium-aluminum hydrotalcite is guaranteed, the particle size of the powder is reduced, energy is saved, operation is convenient, the method can have the purificat