| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the corrosion of the equipment downstream of a hydrocracking apparatus due to residual organic acids in the hydrocracking product and the lowering of a middle cut when the flow rate of a wax fraction to be supplied to a hydrocracking step is decreased. SOLUTION: The hydrocracking process includes a hydrocracking step of hydrocracking a wax fraction obtained by the FT synthesis reaction, a gas-liquid/oil-water separating step of subjecting the obtained hydrocracking product 16 to gas-liquid separation and separating the liquid phase into a hydrocarbon oil phase and an aqueous phase, a fractional distillation step of subjecting the separated hydrocarbon oil phase to fractional distillation in a fractionating column 20 to obtain at least a middle cut and a bottom oil, and a recycling step of again supplying the bottom oil to the hydrocracking step and in the hydrocracking step, the LHSV is 0.6-2.0 h<SP>-1</SP>and the reaction temperature is 290-310°C, and the pH of the aqueous phase at normal temperatures is not less than 6. COPYRIGHT: (C)2011,JPO&INPIT |
