Compartmentalized oligomerization reactor

A reactor suitable for oligomerization by homogeneous catalysis, comprising

• a reactor chamber (1) of elongate shape along the vertical axis;
• a plurality of n oligomerization zones (Zn), which are delimited by internal compartmentalization walls arranged along the vertical axis of the chamber (1) and which are each able to contain a liquid part of catalytic activity and a gaseous part;
• connection of the n oligomerization zones in series;
• an inlet introducing, into each compartment Z1 to Zn-1, a flow comprising an olefinic feedstock;
• an outlet withdrawing, from the final compartment Zn, an oligomerization effluent, in which reactor
• n is an integer equal to 3;
• said internal compartmentalization walls are flat plates and a cylindrical wall arranged in such a way as to delimit said n oligomerization zones (Zn) interconnected in series so as to be able to transfer a liquid phase of catalytic activity from a zone Zn-1 to an adjacent zone Zn by way of said connection.