30-10-2014 дата публикации
Номер: US20140323779A1
The invention concerns a process for the preparation of a catalyst based on tungsten intended for hydrotreatment or hydrocracking processes. 1. A process for the preparation of a catalyst comprising at least one support , optionally at least one metal from group VIII of the periodic classification of the elements and at least tungsten , said process being characterized in that the tungsten is introduced onto the support , in an organic solvent A , in the form of at least one mononuclear precursor compound based on W , in its monomeric or dimeric form , having at least one W═O or W—OR bond or at least one W═S or W—SR bond where [R═CHwhere x≧1 and (x−1)≦y≦(2x+1) or R═Si(OR′)or R═Si(R′)where R′═CH where x′≧1 and (x′−1)≦y′≦(2x′+1)].2. The process as claimed in claim 1 , in which the metal from group VIII is selected from cobalt claim 1 , iron or nickel.3. The process as claimed in claim 2 , in which the metal from group VIII is nickel.4. The process as claimed in claim 1 , in which the tungsten precursor is a mononuclear precursor based on tungsten W claim 1 , used in its monomeric or dimeric form claim 1 , with formula{'br': None, 'sub': n', 'n′', 'a', 'b', 'e', 'd', 'e', 'f', 'g, 'W(═O)(═S)(OR)(SR′)(L1)(L2)(L3)(L4)(L5),'}{'sub': x', 'y', '3', '3', 'x′', 'y′, 'where R═CHwhere x≧1 and (x−1)≦y≦(2x+1) or R═Si(OR″)or R═Si(R″)where R″═C′H′ where [x″≧1 and (x″−1)≦y″≦(2x″+1)],'}{'sub': x′', 'y′', '3', '3', 'x′″', 'y′″, 'where R′═CH where x′≧1 and (x′−1)≦y′≦(2x′+1) or R′═Si(OR′″)or R′═Si(R′″)where R′″═CH where [x′″≧1 and (x′″-1)≦y′″≦(2x′″+1)],'}where 0≦n+n′≦2 and 0≦n≦2 and 0≦n′≦2,where, if n=n′=0, then (a≠0 or b≠0) and [(a+b+c+d+e+f+g=6 and 0≦a≦6, 0≦b≦6, 0≦c≦6, 0≦d≦6, 0≦e≦6, 0≦f≦6, 0≦g≦6, or (a+b+c+d+e+f+g=5 and 0≦a≦5, ≦b≦5, ≦c≦5, ≦d≦5, ≦e≦5, ≦f≦5, ≦g≦5), or (a+b+c+d+e+f+g=4 and 0≦a≦4, ≦b≦4, ≦c≦4, ≦d≦4, ≦e≦4, ≦f≦4, ≦g≦4)],where, if [(n=1 and n′=0) or (n′=1 and n=0)], then [(a+b+c+d+e+f+g=4 and 0≦a≦4, ≦b≦4, ≦c≦4, ≦d≦4, ≦e≦4, ≦f≦4, ≦g≦4)] or [(a+b+c+d+e+f+g=3 and 0≦a≦3, 0≦b≦3, 0 ...
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