METHOD FOR HYDRODESULFURIZING AND ISOMERIZING LIGHT HYDROCARBON OIL

摘要

PROBLEM TO BE SOLVED: To provide a method for hydrodesulfurizing and isomerizing a light hydrocarbon oil, by which the sulfur-containing light hydrocarbon oil can simultaneously be hydrodesulfurized and isomerized to obtain the isomerized gasoline having a low sulfur content and by which a catalyst enabling to simultaneously carry out an isomerization process and a desulfurization process having been essential as a pretreating process for the isomerization process can be provided to simplify necessary installations and lower the running cost. SOLUTION: This method for hydrodesulfurizing and isomerizing a light hydrocarbon oil is characterized by using a catalyst which is prepared by adding sulfate radical in an amount of 1 to 3 wt.% as a sulfur content and platinum in an amount of 0.5 to 10 wt.% to a carrier comprising zirconium oxide or hydroxide and then calcining and stabilizing the mixture at 550 to 800 deg.C and has a specific surface area of 50 to 150 m2/g, and bringing hydrogen and the light hydrocarbon oil having a sulfur content of <=700 weight ppm into contact with the prepared catalyst under conditions comprising a temperature of 160 to 240 deg.C, a pressure of 1.0 to 4.5 MPa, an LHSV of 1.0 to 10 h-1m, an H2/Oil ratio of 1 to 3 mol/mol to hydrodesulfurize and simultaneously isomerize the light hydrocarbon oil.