Patent ID: 9273255
Filing Date: 2016-03-01
CPC Classification: B01J,C07C,C10G

Claim Text:
1. A method for producing middle distillates from a feedstock produced by Fischer-Tropsch synthesis and containing oxygenated compounds, said method comprising at least: a) hydrotreating said feedstock in the presence of a hydrotreating catalyst at a temperature of 100 to 450° C., at a pressure of 0.2 to 15 MPa, the hydrogen necessary for the reaction of hydrotreating being introduced in hydrotreating at a flow rate such that the hydrogen/feedstock volume ratio is 10 to 3000 normal liters per liter, and at an hourly space velocity of 0.1 to 40 h b) hydroisomerizing/hydrocracking of at least a part of a liquid and gaseous effluent originating from a), in the presence of a hydroisomerization/hydrocracking catalyst, c) gas/liquid separation of a stream originating from b) into a gaseous fraction comprising predominantly hydrogen, a hydroisomerized/hydrocracked organic liquid fraction and an aqueous fraction, d) fractionating of the organic liquid fraction separated in c) to obtain at least a gaseous fraction comprising predominantly light gases (C e) methanating CO and CO in which and