| 摘要 |
PURPOSE: A Process for hydrotreating a hydrocarbon distillate fraction in a single stage by using a stacked bed configuration is provided to significantly reduce both the aromatic content and the content of sulphur and nitrogen species present in the feed without substantial hydrocracking occurring. CONSTITUTION: A hydrotreating process comprises passing the hydrocarbon distillate fraction downwardly over a stacked bed of two hydrotreating catalysts in the presence of hydrogen, wherein the stacked bed comprises (a) an upper catalyst bed consisting of a hydrotreating catalyst comprising from 0.1 to 15 % by weight of at least one noble metal selected from platinum, palladium and iridium, and from 2 to 40 % by weight of at least one metal selected from tungsten, chromium, a Group VIIB metal and a metal of the actinium series supported on an acidic refractory oxide carrier, the weight percentages indicating the amount of metal based on the total weight of carrier, and (b) a lower catalyst bed consisting of a hydrotreating catalyst comprising from 1 to 15 % by weight of a non-noble Group VIII metal and from 1 to 25 % by weight of a Group VIB metal on an amorphous inorganic refractory oxide carrier, the weight percentages indicating the amount of metal based on the total weight of catalyst, and recovering a liquid hydrocarbon oil product having a reduced content of aromatic and a reduced heteroatom content.
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