BULK CATALYST PRECURSORS AND METHOD FOR OBTAINING SUCH BULK CATALYST PRECURSORS

摘要

The instant invention concerns a method for preparing a bulk catalyst precursor comprising the following steps: a) reacting precursors of the desired catalyst precursor in a mixture comprising, or consisting of, precursors and at least one solvent comprising water and/or alcohol, said mixture being under supercritical conditions, and b) recovering catalyst precursor, in particular as particles, a bulk catalyst precursor comprising Group VIIIB and/or Group VIB metal, having a SBET superior or equal to 80 m²/g, a bulk catalyst and a method for deep or ultra deep hydrodesulfuration.