| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydroisomerization catalyst for hydrocarbons having high activity and high isomerization selectivity capable of obtaining a middle distillate of a low pour point from normal-paraffinic hydrocarbons with a high yield. SOLUTION: The hydroisomerization catalyst for hydrocarbons is characterized by comprising a second zeolite having a skeleton structure wherein the content A defined by equation (1): Content A (mol%) = [molar number of elements contributing to developing solid acidity relative to elements constituting the skelton structure] / [total molar number of elements constituting the skelton structure (excluding oxygen atom)]×100, of an element constituting the skeleton structure and contributing to developing its solid acidity relative to the elements constituting the skeleton structure is from 0.2 to 8 mol%, which skeleton structure is the same as that of a first zeolite, with the second zeolite having been prepared by hydrothermal synthesis in the presence of the first zeolite of a unidimensional microporous structure comprised of a ten or an eight membered ring wherein the content A defined by equation (1) of the elements constituting the skeleton structure and contributing to developing its solid acidity relative to the element constituting the skeleton structure is lower than 0.2 mol%, and at least one species of metal selected from the group consisting of the species of metal belonging to Group VIII or Group VI in the Periodic Table. COPYRIGHT: (C)2009,JPO&INPIT
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