| abstract |
The invention concerns a method for producing middle distillate hydrocarbon bases from a butanol feedstock, said method comprising at least: a) a step of isomerisation dehydration of said butanol feedstock, b) a step of separating the water present in said butylene effluent, c) a step of purifying the organic liquid effluent from step b), d) a first step of oligomerisation of a feedstock comprising at least a portion of the purified organic effluent from step c), all of the effluent from step g) and at least a portion of the light product from step f), e) a second step of oligomerisation of said first oligomerisation effluent so as to produce a second oligomerisation effluent, f) a step of fractionation of said second oligomerisation effluent into at least three products corresponding respectively to a light product mostly comprising compounds C2 to C4, an intermediate product mostly comprising compounds C5 to C9, and a middle distillate product mostly comprising the compounds having at least 10 carbon atoms, g) a third step of oligomerisation of at least a portion of said intermediate product, h) a step of hydrogenating at least a portion of said middle distillate product. |