MIXED OXIDES OF TRANSITION METALS, HYDROTREATMENT CATALYSTS OBTAINED THEREFROM AND PREPARATION PROCESS

FIELD: chemistry.SUBSTANCE: invention relates to mixed oxides, which are suitable as hydrotreatment catalyst precursors based on metal sulphides, to compositions containing said mixed oxides, to sulphide compounds of metals, obtained by sulphurising said mixed oxides or compositions, methods of producing mixed oxides, methods for hydrotreatment, hydrodearomatisation, hydro-cracking. Mixed oxides have formula (I): NiYZO·pC (I), possibly formed without binder, where Y is a mixture of Mo and W at molar ratio Mo/W greater than 0.1 and less than 10, Z is selected from Si, Al and mixtures thereof, O is oxygen, C is an organic component, selected from nitrogen-containing compounds N, organic residue R, containing carbon and nitrogen, mixture of residue R and nitrogen-containing compound N. Said nitrogen-containing compound N is an amine of formula RRRN, where values of radicals are given in patent claim. X-ray diffraction patterns of mixed oxides of formula (I) shows presence of amorphous phase and monoclinic crystalline phase, iso-structured tungstenite, degree of crystallinity of said mixed oxides is 3% or more and equal to 90 % or less. Method of producing (versions) mixed oxides involves following steps: 1) preparation of a mixture in water of a Ni source, W source and Mo source, a source of element Z and amine; 2) subjecting mixture to hydrothermal treatment to produce a suspension, 3) extraction from suspension of a solid substance contained therein, 4) subjecting solid substance extracted at step (3), to heat treatment at temperature higher than or equal to 150 °C and lower than 900 °C. Disclosed catalysts are especially active in hydrotreatment processes and, in particular, in hydrodesulphurisation hydrodenitrogenation and/or hydrodearomatisation.EFFECT: said catalysts are capable of reducing content of aromatic compounds by hydrodearomatisation and, in particular, aromatic polynuclear compounds (PNA) present in processed fraction, wherein hydrodearomatisation occurs simultaneously with hydrodesulphurisation and hydrodenitrogenation, if impurities of sulphur and nitrogen are also present in fraction.34 cl, 10 dwg, 4 tbl, 13 ex Изобретение относится к смешанным оксидам, которые пригодны в качестве предшественников катализаторов гидроочистки на базе сульфидов металлов, к композициям, содержащим указанные смешанные оксиды, к сульфидным соединениям металлов, полученным сульфидированием указанных смешанных оксидов или композиций, к способам получения смешанных