| 摘要 |
1. Catalyst comprising : a) a support containing a porous inorganic matrix, boron or a boron compound and phosphorus or a phosphorus compound, and b) at least one metal or compound of metal from Group VIB of the periodic table of elements and at least one metal or compound of metal from Group VIII of said table, characterized in that the sum of the boron and the phosphorus amounts, respectively expressed in weight of boron trioxide and phosphorus pentoxide, in relation to the weight of the support, is from about 5 to 15% and the boron to phosphorus atomic ratio is from 1.05:1 to 2:1, and in that at least 40% of the total pore volume of the finished catalyst is contained in pores with an average diameter greater than 13 nanometers.
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