Process for upgrading refinery heavy residues to petrochemicals

Patent metadata

Field	Value
Publication number	US-11072750-B2
Application number	US-201816115982-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Jul 2, 2013
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

The present invention relates to a process for upgrading refinery heavy residues to petrochemicals, comprising the following steps of:
(a) separating a hydrocarbon feedstock in a distillation unit into a to overhead stream and a bottom stream (b) feeding said bottom stream to a hydrocracking reaction area (c) separating reaction products, which are generated from said reaction area of step (b) into a stream rich in mono-aromatics and in a stream rich in poly-aromatics (d) feeding said stream rich in mono-aromatics to a gasoline hydrocracker (GHC) unit, (e) feeding said stream rich in poly-aromatics to a ring opening reaction area.

First claim

The invention claimed is:

1. A process for upgrading refinery heavy residues to petrochemicals, comprising the steps of:
(a) separating a hydrocarbon feedstock in a distillation unit into a top overhead stream and a bottom stream, wherein the hydrocarbon feedstock consists of waxes, gas condensates, kerosene and diesel;
(b) feeding said bottom stream to a hydrocracking reaction area, wherein the process conditions prevailing in said hydrocracking area consist of a temperature of 300° C., a pressure of 300 kPa gauge and a Weight Hourly Space Velocity of 0.1 h −1 ;
(c) separating reaction products, which are generated from said reaction area of step (b) into a stream rich in mono-aromatics and in a stream rich in poly-aromatics, wherein the stream rich in mono-aromatics consists of mono-aromatics having a boiling range of from 70° C. to 217° C., and wherein said stream rich in poly-aromatics consists of poly-aromatics having a boiling range of from 217° C. and higher;
(d) feeding said stream rich in mono-aromatics to a gasoline hydrocracker unit, wherein the process conditions prevailing in said gasoline hydrocracker unit consist of a reaction temperature of 300° C., a pressure of 0.3 MPa gauge and a Weight Hourly Space Velocity (WHSV) of 0.1 h −1 ;
(e) feeding said stream rich in poly-aromatics to a ring opening reaction area; wherein the process conditions prevailing in said ring opening reaction area consist of a temperature of 100° C. and a pressure of 2 MPa together with from 50 to 300 kg of hydrogen per 1,000 kg of said stream rich in poly-aromatics over an aromatic hydrogenation catalyst and passing a resulting stream from said ring opening reaction area to a ring cleavage unit at a temperature of 200° C. and a pressure of 1 Mpa together with from 50 to 200 kg of hydrogen per 1,000 kg of said resulting stream over a ring cleavage catalyst;
feeding a stream rich in paraffins separated from the top overhead stream in step (a) into an isomerization unit and feeding the thus isomerized stream to a steam cracking unit;
separating reaction products of said gasoline hydrocracker of step (d) into an overhead gas stream comprising C2-C4 paraffins, hydrogen and methane and a bottom stream comprising aromatic hydrocarbon compounds and non-aromatic hydrocarbon compounds; feeding the overhead stream from the gasoline hydrocracker unit into the steam cracker unit;
separating the reaction products from the ring opening step (b) into a heavy fraction and a light fraction and feeding the heavy fraction of reaction products formed in the reaction area for ring opening into the gasoline hydrocracker unit; and
feeding the light fraction of reaction products formed in the reaction area for ring opening into the steam cracker unit.

Assignees

• Saudi Basic Ind Corp
• Sabic Global Technologies Bv

Inventors

• Housmans Thomas Hubertus Maria
• Oprins Arno Johannes Maria

Classifications

• C10G69/06

  including at least one step of thermal cracking in the absence of hydrogen · CPC title

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G65/00

  Treatment of hydrocarbon oils by two or more hydrotreatment processes only · CPC title

• C10G67/0445

  The hydrotreatment being a hydrocracking · CPC title

• C10G2300/1077

  Vacuum residues · CPC title