Method for synthesizing pentaerythritol tetraglycidyl ether

The invention relates to a method for synthesizing pentaerythritol tetraglycidyl ether, which comprises the following steps: (1) a ring opening reaction: pentaerythritol and epoxy chloropropane are adopted as raw materials to synthesize an intermediate product chlorohydrin ether, wherein one or more of a boron trifluoride diethyl ether complex, stannic chloride, fluoboric acid, boron trifluoride and zinc perchlorate are used as catalysts, the reaction temperature is 40-100 DEG C, and the feeding ratio of the mole number of pentaerythritol hydroxyl to epoxy chloropropane is 1: 3.0 to 1: 8.0, and the solvent is one or more of methylbenzene, cyclohexane, dichloroethane, chloroform and dioxane; (2) solvent removal: the solvent is removed from the product obtained by the ring-opening reaction to obtain a chlorohydrin ether intermediate; (3) ring-closure reaction: a certain amount of solvent is added into the chlorohydrin ether intermediate, and then ring-closure reaction with alkali is carried out; and (4) post-tr