Separation device for catalyst in benzene partial hydrogenation reaction in production process of cyclohexanone

The utility model discloses a separation device for a catalyst in a benzene partial hydrogenation reaction in a production process of cyclohexanone, which comprises two benzene partial hydrogenation reactors internally provided with agitators. Each reactor is respectively provided with a built-in membrane separator and a catalyst feed pipe. The feed pipe is respectively arranged at the bottom of the reactor. Height difference between two reactors is 1-3m. A purified liquor outlet of a membrane reactor of a first reactor is connected with a reaction material inlet of a second reactor and a purified liquor outlet of a membrane reactor of a second reactor is connected with a storage tank. A metal membrane or a ceramic membrane is installed inside the built-in membrane separator. The aperture of the membrane tube of the metal membrane or the ceramic membrane is 0.1-5 microns. With adoption of the utility model, materials are separated after reaction, the catalyst is cutoff in the reactor and the intermediate products in reaction are filtered and enter into the next step, thereby omitting the step of settling the catalyst, preventing the catalyst from leakage, cancelling the step of conveying the catalyst to the reaction tank by a high pressure pump, so as to reduce the equipment investment, lower the energy consumption and simplify the separation flow of the catalyst.