Abstract: A reactor for carrying out a three-phase reaction of a liquid phase, a gaseous phase, and a catalyst over a fixed catalyst bed is disclosed. The liquid and gaseous phases are passed through the reactor via a mixing and distribution device positioned over the fixed catalyst bed. The mixing and distribution device includes a trough distributor for the liquid phase, having trough-shaped channels, outlet tubes in the trough-shaped channels for the liquid phase, a distributor plate below the trough distributor, and vertical nozzles, having one or more openings for the gaseous phase and one or more openings, arranged below the openings for the gaseous phase. For entry of the liquid phase, the nozzles are installed so that, at a predetermined liquid feed rate, the surface of the liquid on the distributor plate is below the openings for the gaseous phase and above the openings for the liquid phase.

Abstract: A reactor (R) for carrying out a three-phase reaction of a liquid phase (1) and a gaseous phase (2) over a fixed catalyst bed (F), with the fixed catalyst bed (F) being arranged horizontally in the reactor (R) and the liquid phase (1) and the gaseous phase (2) being passed through the reactor (R) in cocurrent from the top downward via a mixing and distribution device (MD) over the fixed catalyst bed (F), wherein the mixing and distribution device (MD) comprises a trough distributor (TD) for the liquid phase (1) having trough-shaped channels (C) and outlet tubes (O) in the trough-shaped channels (C) for the liquid phase (1) and a distributor plate (P) which is arranged with a spacing below the trough distributor (TD) and in which vertical nozzles (N) having one or more openings (P1) for entry of the gaseous phase (2) and one or more openings (P2), which are arranged below the openings (P1) for entry of the gaseous phase, for entry of the liquid phase (1) into the nozzles (N) are installed, with the number and