Dissolver reactor with removable basket

A horizontal reactor comprising a fixed outer housing of generally circular cylindrical shape, equipped with at least one liquid inlet and at least one liquid outlet, with a cylindrical wall bordered by a front face and a distal face opposite to each other, characterized in that the housing has an opening provided in its front face, the opening being equipped with a cover which can be closed in a sealed manner, and in that the reactor further comprises a rotating cage of generally circular cylindrical shape, comprising multiple openings, housed in the housing and rotatably mounted around a substantially horizontal axis extending along a longitudinal axis of the housing, a motor for driving the rotating cage in rotation, a single horizontal rotary shaft mechanically connecting the rotating cage to the motor and extending outwards from the distal face of the housing, at least one bearing provided around the rotary shaft to hold and guide the rotary shaft, and to support a weight of the rotating cage in cantilever, at least one removable basket comprising multiple openings and configured to be able to be introduced inside the rotating cage and to be removed therefrom through an open circular face of the rotating cage provided opposite the opening equipped with the cover.