| 摘要 |
It is intended to provide a method for producing an LPG fraction, a gasoline fraction, a kerosene fraction, a gas oil fraction, monocyclic aromatic hydrocarbon and a non-aromatic naphtha fraction from hydrocracked oil obtained by hydrocracking hydrocarbon oil containing polycyclic aromatic hydrocarbon to convert into a light hydrocarbon fraction, and at the same time efficiently and selectively to produce monocyclic aromatic hydrocarbon which is higher valuable alkylbenzenes. The method for producing hydrocarbon fraction of the present invention comprises a hydrocracking step of subjecting a hydrocarbon feedstock which contains polycyclic aromatic hydrocarbon and in which the ratio of carbons constituting an aromatic ring to the total carbons in the hydrocarbon oil (the aromatic ring-constituting carbon ratio) is 35 mole % or more to catalytic cracking in the presence of hydrogen, and is characterized in that 40% or more of a fraction with a boiling point of 215°C or higher in the hydrocarbon feedstock is converted into a fraction with a boiling point lower than 215°C and an hydrocracked oil containing 30 vol % or more of monocyclic aromatic hydrocarbon is produced. |
