| abstract |
New catalysts containing heteropolyanions of 12-tungstophosphoric acid or 12-tungstomolybdic acid and, for some, at least one group VIII metal, and deposited on supports developing a high specific surface and pore volume, such that zirconium oxide (ZrO 2 ), silicas, silica-aluminas or aluminas, are used in particular in isomerization of paraffinic cuts containing mainly n-paraffins having for example from 4 to 8 carbon atoms per molecule and in aliphatic alkylation of isoparaffins (for example isobutane and / or isopentane) with at least one olefin comprising for example from 2 to 6 carbon atoms per molecule (C 2 to C 6 ). |