PROCEDE DE PRODUCTION DE DISTILLATS MOYENS PAR HYDROISOMERISATION ET HYDROCRAQUAGE DE 2 FRACTIONS ISSUES DE CHARGES PROVENANT DU PROCEDE FISCHER-TROPSCH

摘要

The method comprises the following steps: fractionation of the paraffinic product from a Fischer-Tropsch synthesis into at least three fractions, one intermediate fraction boiling between T1 and T2, with T1 between 120 and 200 DEG C and T2 greater than 300 DEG C and less than 410 DEG C, a light fraction with a lower boiling point and a heavy fraction with a higher boiling point; the intermediate fraction is at least partly hydrotreated, then at least partly passed over an amorphous hydroisomerisation/hydrocracking catalyst; the heavy fraction is passed over an amorphous hydroisomerisation/hydrocracking catalyst with a conversion of products boiling at 370 DEG C+ into products boiling at less than 370 DEG C of greater than 80 % by weight; and distillation of products from hydrocracking/hydroisomerisation to give medium distillates (kerosene, diesel). An installation is also disclosed.