US 5,851,381 A · Method of refining crude oil

Abstract

A method of refining crude oil by distillation and desulfurization for the preparation of petroleum products can reduce cost of apparatus and cost of operation and can be operated with better stability by simplified control of operation. In the method, a naphtha fraction is separated from crude oil by distillation, the residual fraction which remained after the naphtha fraction has been removed from the crude oil is hydrodesulfurized and the hydrodesulfurized fraction is separated into further fractions by distillation. A kerosene fraction and a gas oil fraction of high quality can be obtained and yields of intermediate fractions such as kerosene and gas oil can be increased by introducing a hydrotreating process, a high pressure separation process and a residue fluid catalytic cracking process in a sophisticated way for refining of the residual fraction remained after the naphtha fraction has been removed from the crude oil.

Claims19

Dependent claims

A method of refining crude oil by distillation and desulfurization for preparation of petroleum products which comprises

separating a naphtha fraction from crude oil by a first distillation,
hydrodesulfurizing at a pressure of 100 to 200 kg/cm.sup.2 G a residual fraction which remains after the naphtha fraction has been removed from the crude oil,
separating the hydrodesulfurized fraction into a light fraction and a heavy residual oil in a high pressure separator,
hydrotreating at a pressure of 100 to 200 kg/cm.sup.2 G the light fraction and
separating the hydrotreated light fraction by a second distillation into a kerosene fraction, a light gas oil fraction, a naphtha fraction and a residual crude fraction.

2 more elements

A method of refining crude oil by distillation and desulfurization for preparation of petroleum products which comprises

separating a naphtha fraction from crude oil by a first distillation,
hydrodesulfurizing at a pressure of 100 to 200 kg/cm.sup.2 G a residual fraction which remains after the naphtha fraction has been removed from the crude oil,
separating the hydrodesulfurized fraction into a light fraction and a heavy residual oil in a high pressure separator,
cracking the heavy residual oil by fluid catalytic cracking,
fractionating the cracked heavy residual oil by a second distillation,
combining a cracked gas oil fraction obtained by the fractionation by the second distillation with the light fraction separated in the high pressure separator,
hydrotreating at a pressure of 100 to 200 kg/cm.sup.2 G the combined fraction and
separating the hydrotreated combined fraction into further fractions by a third distillation into a kerosene fraction, a light gas oil fraction, a naphtha fraction and a residual crude fraction.

5 more elements

Dependencies are inferred from the claim text.

Method of refining crude oil

Life of this patent

Method of refining crude oil

Life of this patent

Abstract

Claims19