Hydroisomerization catalyst, process for producing the same, method of dewaxing hydrocarbon oil, and process for producing lube base oil

A hydroisomerization catalyst, obtained by calcining a catalyst composition comprising a calcined and ion-exchanged molecular sieve and at least one metal selected from the group consisting of metals of Groups 8to 10in the Periodic Table of the elements, molybdenum, and tungsten, carried on the calcined and ion-exchanged molecular sieve, wherein

• the calcined and ion-exchanged molecular sieve is obtained by ion-exchanging a molecular sieve comprising an organic template in a solution containing water as a main solvent and a cationic species to remove a part of the organic template and calcining the molecular sieve comprising an organic template to remove another part of the organic template, and
• the molecular sieve comprising an organic template has a nanocrystal having a pore structure of ten-membered rings or eight-membered rings and has a ratio of the pore volume to the external surface area ([pore volume][external surface area]) of 2.0×104 mL/m2 to 8.0×10−4 mL/m2.