Hydroconversion of a hydrocarbon-based heavy feedstock in a hybrid ebullated-entrained bed, comprising mixing said feedstock with a catalyst precursor containing an organic additive

Abstract

A hydroconversion process of a heavy oil feedstock comprises: (a) preparing a conditioned feedstock by mixing said heavy oil feedstock with a catalyst precursor formulation so that a colloidal or molecular catalyst is formed when it reacts with sulfur wherein the catalyst precursor formulation comprises a catalyst precursor composition containing Mo, an organic additive comprising a carboxylic acid function and/or an ester function and/or an acid anhydride function, wherein the molar ratio organic additive/Mo from formulation is between 0.1:1 and 20:1; (b) heating said conditioned feedstock; and (c) introducing the heated conditioned feedstock into at least one hybrid ebullated-entrained bed reactor comprising a hydroconversion porous supported catalyst, wherein the reactor is operated in the presence of hydrogen and at hydroconversion conditions to produce an upgraded material, the colloidal or molecular catalyst being formed during step (b) and/or (c).