III International Conference

PP-III-55and sulfur, was spent (figure). The quantity of coke is a minimum for the most active catalyst.Totality of the experimental data suggests that in hydrothermal stage of preparation ofNiMoV/γ-Al 2 O 3 catalysts precede the formation of heteropolycompound (HPC) VMo 12 type.By analogy to others HPC be take the synthesis (NH 4 ) x [V(MoO 3 ) 12 ]٠nH 2 O assumed formula.In this compound FTIR-spectra was found the HPC characteristic bands.(NH 4 ) x [V(MoO 3 ) 12 ]٠nH 2 O was use for preparation of the NiMoV/γ-Al 2 O 3 catalyst (sample 1).The catalyst with the same contents metals has been prepared from (NH 4 ) 6 Mo 7 O 24 •4H 2 O andNH 4 VO 3 (sample 2). The sample of comparison was NiMo/γ-Al 2 O 3 (sample 3). The maximalactivities in HDS and in hydrogenation of PCAC have the sample 1, the minimal activity havethe sample 3.Influence additive of Sn on thecatalytic activity of the supported NiMo/γ-Al 2 O 3 catalysts were investigation. Theresults suggest that during of thepreparation of NiMoSn/γ-Al 2 O 3 catalystsprecede the formation and that thiscompound increase the catalytic activityNiMo/γ-Al 2 O 3 catalysts. Earlier was shownFig. DTA spectra of the catalysts after testthat modification the Ni(Co)Mo/γ-Al 2 O 3catalysts with additions P and Si lead toformation corresponding HPC. Probably,formation of HPC occurs at introduction ofthe majority of other additives offered forcatalysts of hydrotreating, i.e. the reason ofincrease of catalytic activity is universal;however it demands experimental check.References:1. N.N. Tomina, A.A. Pimerzin, A.N.Loginova, M.A. Sharickina, E.O. Czilkina, Y.V. Eremina. //Neftekhimiya. 44 (2004) 4. P. 274-277.2. Bachelier J., Tulliette M.J., Duchet J.C., Cornet J. // J.Catal. 84 (1984) 2. P. 292.575