Oligomerisation process comprising a step of recycling a pre-cooled solvent

A process for the oligomerization of an olefinic feedstock carried out at a temperature between 30° C. and 200° C. and a pressure between 0.1 and 10 MPa, in the presence of a homogeneous catalytic oligomerization system and a solvent, said process comprising;

• a) a step of oligomerizing said olefinic feedstock in a reaction section comprising an oligomerization reactor and one or more recirculation loops enabling the control of the temperature in said reactor via the cooling of a liquid phase fraction,
• b) a step of separating, in a downstream separation section, a reaction effluent resulting from the oligomerization step a) so as to obtain a solvent fraction,
• c) a step of cooling the solvent fraction resulting from step b) to a temperature below the temperature of the recirculation loop(s), and
• d) a step of introducing, into the oligomerization step a), the cooled solvent fraction resulting from step c) in the reaction section.