To provide a method for treating petroleum which enables recovery of a lot of value-added fractions having a boiling point lower than that of light oil by cracking a distillation residual oil under the normal pressure, thereby enables the economical and effective use of the distillation residual oil under the normal pressure, extremely simplifies a treating process and a treating system for an economical treatment of petroleum compared to a conventional process and a conventional system of discretely treating each distilled component by hydrogenating distilled oil under the normal pressure and low boiling point fractions obtained by cracking the distillation residual oil under the normal pressure at a time and to provide a treating system of petroleum having such a simple construction which can economically treat petroleum.
This method for treating petroleum comprises a process (A) of distilling crude oil under the normal pressure to separate the crude oil into distilled fractions under the normal pressure and a distillation residual oil under the normal pressure, a process (B) of cracking at least a part of the distillation residual oil under the normal pressure, a process (C) of separating the cracked compounds obtained by process (B) into low boiling point fractions and high boiling point fractions and a process (D) of hydrogenating the distilled oil under the normal pressure together with the low boiling point fractions.
SUHARA SHINICHIRO
INOMATA MAKOTO
SUGIMOTO AKIRA
NAGAMATSU SHIGEKI
