Method of converting feedstocks from renewable sources to good-quality diesel fuel bases using a zeolite catalyst without intermediate gas-liquid separation

A method of treating a feedstock from a renewable source, comprising the following stages:

• a) hydrotreatment of said feedstock from a renewable source in the presence of a fixed-bed catalyst, said catalyst comprising a hydro-dehydrogenizing function and an amorphous support, at a temperature ranging between 200° C. and 450° C., at a pressure ranging between 1 MPa and 10 MPa, at an hourly space velocity ranging between 0.1 h−1 and 10 h−1 and in the presence of a total amount of hydrogen mixed with the feedstock such that the hydrogen/feedstock ratio ranges between 150 and 750 Nm3 hydrogen/m3 feedstock,
• b) separation, from the effluent from stage a), of at least part of resultant water and at least one hydrocarbon-containing base,
• c) removal of the nitrogen compounds from said hydrocarbon-containing base from stage b),
• d) hydroisomerization of at least part of said hydrocarbon-containing base from stage c) in the presence of a fixed-bed hydroisomerization selective catalyst, said catalyst comprising at least one group VIII metal and/or at least one VIB group metal and a monodimensional 10 MR zeolite molecular sieve that is ZSM-48 or ZBM-30, alone or in admixture, said stage c) being carried out at a temperature ranging between 150° C. and 500° C., at a pressure ranging between 1 MPa and 10 MPa, at an hourly space velocity ranging between 0.1 h−1 and 10 h−1 and in the presence of a total amount of hydrogen mixed with the feedstock such that the hydrogen/feedstock ratio ranges between 70 and 1000 Nm3/m3 feedstock,
• e) separation, from the effluent from stage d), of the hydrogen, other gases and at least one diesel fuel base.