Use of a bifunctional catalyst based on IZM-2 with a specific Si/Al ratio for the isomerization of long paraffinic feedstocks to middle distillates

Process for isomerization of a paraffinic feedstock having between 9 and 25 carbon atoms, said paraffinic feedstock been produced from renewable resources selected from plant oils, oils of algae or algal oils, fish oils and fats of plant or animal origin, or mixtures thereof, or by a process comprising upgrading the paraffinic feedstock via a Fischer-Tropsch route,

• wherein the isomerization process operates at a temperature of between 200° C. and 500° C., at a total pressure of between 0.45 MPa and 7 MPa, at a hydrogen partial pressure of between 0.3 and 5.5 MPa, at an hourly space velocity of between 0.1 and 10 kilograms of paraffinic feedstock introduced per kilogram of catalyst and per hour and with a catalyst comprising at least one metal of group VIII of the periodic table of elements, at least one matrix and a IZM-2 zeolite,
• wherein a molar ratio of silicon to network aluminium of the IZM-2 zeolite is between 25 and 55.