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

A process for the oligomerization of an olefinic feedstock, said process comprising:

• a) oligomerizing said olefinic feedstock in a reaction section at a temperature between 30° C. and 200° C., a pressure between 0.1 and 10 MPa, and in the presence of a homogeneous catalytic oligomerization system and a solvent, the reaction section comprising an oligomerization reactor and one or more recirculation loops enabling control of the temperature in said reactor via cooling of a liquid phase fraction, wherein said one or more recirculation loops is formed by withdrawing a liquid phase fraction from the oligomerization reactor, cooling at least a portion of the withdrawn liquid phase fraction, and introducing the cooled liquid phase fraction into the oligomerization reactor,
• b) separating, in a downstream separation section, a reaction effluent resulting from the oligomerization so as to obtain a solvent fraction,
• c) cooling the solvent fraction to a temperature below the temperature of the one or more recirculation loop(s), and
• d) introducing into the reaction section the cooled solvent fraction.