Reactor for preparing succinyl oxide by maleic anhydride hydrogenation

The invention relates to a reactor for preparing succinyl oxide by maleic anhydride hydrogenation. The invention is characterized in that a trickle bed catalytic reactor is adopted. The trickle bed catalytic reactor is provided with a tower body, a dismountable end socket arranged on the tower body, a hydrogen inlet and a catalyst charging hole which are arranged on the end socket, a distributor arranged at the upper part of the tower body, a maleic anhydride/solvent inlet arranged at the upper part of the distributor, a distribution plate arranged at the lower part of the tower body, a catalyst material layer which is composed of hydrogenation catalyst and is arranged on the distribution plate as well as a catalyst discharging hole and a product outlet which are arranged at the lower part of the tower body. The distributor is in bubble cap type, CZ type, vertical tube type, Technip type, injection type or Venturi type, the distribution plate is in grid type, porous plate type or grid bar type, and aperture r