Brief description of the hydrotreatment of charges from renewable sources with indirect heating using a catalyst based on nickel and molybdenum having an atomic ratio particular

摘要

The present invention describes a process for the treatment of charges from renewable source comprising a hydrotreatment step comprising at least two catalytic zones in which the incoming stream comprising the said charge in a mixture with at least a portion of the hydrotreated liquid effluent from step b), is introduced into the first catalytic zone at a temperature between 150 and 260°C, and the effluent from the first catalytic zone is then introduced in mixture with at least a portion of the hydrotreated liquid effluent from step b) and preheated in the following or the catalytic zones at a temperature of between 260 and 320°C, and a step of separation of the effluent from the hydrotreatment step for the separation of a gaseous effluent and a liquid effluent hydrotreated, at least a portion of which is recycled at the head of each catalytic zone, said process using at least in the following the first catalytic zones, a mass or supported catalyst comprising an active phase consisting of at least one group vib element and at least one group viii element, said elements being in the form of a sulfide and the atomic ratio of the metal of group viii metal of group vib, being strictly greater than 0 and less than 0,095.