The invention relates to a
slurry bed loop reactor, application and a method for producing
hydrogen peroxide. The
slurry bed loop reactor comprises a riser, a separation tank and a downcomer which are communicated sequentially, wherein an expansion section with expanded
pipe diameter is arranged at the upper part of the riser, the upper part of the expansion section is communicated with the separation tank, a
liquid phase outlet in the upper part of the separation tank is communicated with the upper part of the downcomer, the bottom of the downcomer is communicated with the bottom of the riser, and the bottom of the separation tank is communicated with the lower part of the downcomer; and a
raw material inlet is formed in the bottom of the riser, gas outlets are formed in the top of the expansion section of the riser and in the top of the separation tank, a
filtration component is arranged in the downcomer and a
clear liquid outlet is formed in the upper part of the downcomer via the
filtration component. According to a hydrogenation method for producing
hydrogen peroxide by an
anthraquinone method with the adoption of the
slurry bed loop reactor, the gas-liquid-
solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a
hydrogen peroxide product with relatively
high concentration can be obtained.