Catalyst based on metals of groups VI and VIII partly in form of heteropolyanions in oxide precursor, used in processes of hydrorefining or hydroconversion of hydrocarbons

摘要

Catalysts containing elements of groups VI and VIII with a strong interaction in the oxide precursor form, associated with a porous matrix. The catalyst comprises an element of group VIII with Mo and/or W, the elements being partly present , in the dry state, as a heteropolyanion with a structure of the form MxAB6O24H6C(3-2x),tH2O (I), MxAB6O24H6C(4-2x), tH2O (I'), MxA2B10O38H4C(6-2x), tH2O, (I''), MxA2B10O38H4C(8-2x), tH2O (I''') and MxA2B10O38H4C(7-2x), tH2O (I''''), in which M = Co and/or Ni and/or Fe and/or Cu and/or Zn; A = a group VIII element( I and I') and one or two group VIII elements(I'', I''' and I''''); B = Mo and/or W; C = H+ and/or ammonium (NR1R2R3R4)+; R1, R2, R3, R4 = H, alkyl and/or Cs and/or K and/or Na; t = 0 - 15; x = 0 - 3/2(I), 0 - 2(I'), 0 - 3(I''), 0 - 4(I''') and 0 - 7/2(I''''). The number of bonds connecting the element(s) of group VIII to Mo and/or W of length less than or equal to 3.6degreesA is greater than 2. An Independent claim is also included for the uses of the catalyst.