Catalyst for removing sulphur and metal contaminants - from heavy crudes and residues without activity decrease for at least 80 days continuous processing

摘要

Catalyst for the simultaneous demetallisation and desulphurisation of heavy crudes and residues comprises an alumina support impregnated with a first impregnating metallic cpd. the metal belonging to Gp. VIB deposited on the support material to comprise 5-30wt.% of the catalyst, calculated as oxide; the impregnated support being subsequently impregnated with a second impregnating metallic cpd. the metal belonging to Gp. VIII deposited on the support to comprise 0.1-8wt.% of the catalyst, calculated as oxide; the first and second impregnating cpds. being reacted with a sulphur-contg. reagent after deposition to produce catalytically active sulphides so that the catalyst has simultaneous demetallising and desulphurising activity in which the percentage ratio of each effect approaches unity over a useful life in excess of 80 days. The catalyst has the physical properties of 0.8-0.9 ml/g total pore volume, 200-300 Angstroms average pore dia., and signal band strength ratios, as determined by X-ray photoelectron spectroscopy, I(Me VIB)/I(refractory metal) of 5-8 and I(Me VIII)/I(refractory metal) of 1-5.