Uniform-type platinum-loaded alumina catalyst, method of producing same, and method of using same

A method of dehydrogenating methylcyclohexane, comprising:

• charging a uniform-type platinum-loaded alumina catalyst in a reaction tube;
• supplying methylcyclohexane gas to the catalyst;
• and
• setting an inlet temperature of the catalyst to 280 to 400° C., an outlet temperature to 380 to 410° C., a reaction pressure to 0.3 to 0.55 MPa, and
• wherein the uniform-type platinum-loaded alumina catalyst consists of:
• an alumina carrier;
• sulfur or a sulfur compound dispersed over an entire cross section of the alumina carrier;
• platinum dispersed and loaded over the entire cross section of the alumina carrier;
• and
• one or more alkali metals selected from the group consisting of sodium and potassium,
• wherein a content of the sulfur or the sulfur compound is 0.15 to 5.0 wt % calculated as elemental sulfur,
• a content of the alkali metal(s) is 0.1 to 5.0 wt % calculated as elemental alkali metal,
• a content of the platinum is 0.05 to 5.0 wt % calculated as elemental platinum, and
• the alumina carrier has a surface area of 150 m2/g or more, a pore volume of 0.40 cm3/g or more, and an average pore diameter of 40 to 300 Å, with pores having a pore diameter in a range of ±30 Å from the average pore diameter occupying 60% or more of a total pore volume.