Preparation method of high-purity dicyclopentadiene dioxide DCPDDO

The invention discloses a preparation method of high-purity dicyclopentadiene dioxide (DCPDDO), which comprises the following steps: by taking a titanium silicalite molecular sieve as a catalyst, reacting DCPD with CHP in the presence of an inert solvent to generate DCPDDO and 2-phenyl-2-propanol; the method comprises the following steps of: performing rectification separation, collecting a solvent at the top of the tower and 2-phenyl-2-propanol, obtaining DCPDDO at the bottom of the tower, performing crystallization separation and purification twice, performing vacuum drying to obtain high-purity solid DCPDDO, mixing unreacted raw materials in crystallization mother liquor or dicyclopentadiene monooxide with fresh reaction raw materials, and continuously reacting in a reactor. According to the preparation process disclosed by the invention, unreacted raw materials can be reused, the material ratio is simple to control, the product yield is high, the discharge amount of waste liquid is remarkably reduced, the