| 摘要 |
The invention relates to a catalyst comprising:a matrix consisting of 0 and 100% by weight of lambd transition alumina, the complement up to 100% by weight of the matrix being in gamma transition alumina, and relative to the total weight of the catalyst,from 0.001 to 2% by weight of silicon,from 0.1 to 15% by weight of at least one halogen chosen from the group formed by fluorine, chlorine, bromine and iodine,from 0.01 to 2% by weight of at least one noble metal from the platinum group, from 0.005 to 10% by weight of at least one promoter metal chosen from the group formed by tin, germanium, indium, gallium, thallium, antimony, lead, rhenium, manganese, chromium, molybdenum and tungsten, andif required from 0.001 to 10% by weight of a doping metal.
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