System for conversion of crude oil to petrochemicals and fuel products integrating vacuum gas oil hydrotreating and steam cracking

Patent metadata

Field	Value
Publication number	US-11066611-B2
Application number	US-201916568774-A
Country	US
Kind code	B2
Filing date	Sep 12, 2019
Priority date	Nov 21, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Process scheme configurations are disclosed that enable conversion of crude oil feeds with several processing units in an integrated manner into petrochemicals. The designs utilize minimum capital expenditures to prepare suitable feedstocks for the steam cracker complex. The integrated process for converting crude oil to petrochemical products including olefins and aromatics, and fuel products, includes mixed feed steam cracking and gas oil steam cracking. Feeds to the mixed feed steam cracker include light products and naphtha from hydroprocessing zones within the battery limits, recycle streams from the C3 and C4 olefins recovery steps, and raffinate from a pyrolysis gasoline aromatics extraction zone within the battery limits. Feeds to the gas oil steam cracker include hydrotreated gas oil range intermediates from vacuum gas oil hydrotreating.

First claim

The invention claimed is:

1. An integrated system for producing petrochemicals and fuel products comprising:
an atmospheric distillation unit (ADU) operable to receive and separate a feed, and discharge a first ADU fraction comprising naphtha, a second ADU fraction comprising at least a portion of middle distillates from the feed, and a third ADU fraction comprising atmospheric residue;
a vacuum distillation unit (VDU) operable to receive and separate the third ADU fraction, and discharge a first VDU fraction comprising vacuum gas oil;
a distillate hydroprocessing (DHP) zone operable to receive and convert middle distillates from the second ADU fraction into a first DHP fraction and a second DHP fraction, wherein the first DHP fraction comprises naphtha and the second DHP fraction is used for diesel fuel production;
a gas oil hydrotreating (GOHT) zone operable to receive and treat vacuum gas oil from the first VDU fraction and produce a first GOHT fraction containing naphtha range components, and a hydrotreated gas oil fraction;
a steam cracking zone comprising (a) a mixed feed steam cracking (MFSC) zone operable to receive and thermally crack naphtha from the first ADU fraction and a C6-C9 non-aromatics raffinate stream derived from an aromatics extraction zone, and (b) a gas oil steam cracking (GOSC) zone operable to receive and thermally crack the hydrotreated gas oil fraction, wherein the steam cracking zone is operable to produce a mixed product stream containing mixed C1-C4 paraffins and olefins, a pyrolysis gas stream, and a pyrolysis oil stream;
a naphtha hydrotreating zone operable to receive and treat the pyrolysis gas stream and produce a hydrotreated pyrolysis gas stream; and
the aromatics extraction zone operable to receive and separate the hydrotreated pyrolysis gas stream into one or more aromatic products streams, and the C6-C9 non-aromatics raffinate stream.

2. The system as in claim 1 , wherein the MFSC zone is operable to receive and thermally crack naphtha from the first DHP fraction, naphtha from the first GOHT fraction, or both naphtha from the first DHP fraction and naphtha from the first GOHT fraction.

3. The system as in claim 1 , wherein the naphtha hydrotreating zone is operable to produce a C5s stream, and wherein the MFSC zone is operable to receive and thermally crack the C5s stream.

4. The system as in claim 1 , wherein the ADU is further operable to receive and separate naphtha from the first DHP fraction, naphtha from the first GOHT fraction, or both naphtha from the first DHP fraction and naphtha from the first GOHT fraction.

5. The system as in claim 1 , wherein the ADU is operable to separate a further ADU fraction including heavy AGO that is heavier than the second ADU fraction and lighter than the third ADU fraction, and wherein the GOHT zone is operable to receive and convert the further ADU fraction.

6. The system as in claim 1 , wherein the ADU is operable to separate a further ADU fraction including heavy AGO that is heavier than the second ADU fraction and lighter than the third ADU fraction, and wherein the GOSC zone is operable to receive and thermally crack the further ADU fraction.

7. The system as in claim 1 , wherein the ADU is operable to separate a further ADU fraction including kerosene that is heavier than the first ADU fraction and lighter than the second ADU fraction, and the system further comprising a kerosene sweetening zone operable to receive and treat the further ADU fraction.

8. The system as in claim 7 , wherein the ADU is operable to separate a further ADU fraction including heavy AGO that is heavier than the second ADU fraction and lighter than the third ADU fraction, and wherein (a) the GOSC zone is operable to receive and thermally crack the additional ADU fraction, or (b) the GOHT zone is operable to receive and convert the additional ADU fraction.

9. The system as in claim 1 , further comprising:
an olefins recovery train operable to receive and separate the mixed product stream into a fuel gas stream, an ethylene stream, a mixed C3s stream, and a mixed C4s stream, and
a C4 distillation unit operable to receive and separate a portion of C4s recovered from the mixed product stream into an olefinic stream and a non-olefinic stream.

10. The system as in claim 9 , wherein the MFSC zone is operable to receive and thermally crack the non-olefinic stream.

11. The system as in claim 9 , further comprising a mixed butanols production zone operable to receive and convert a mixture of butenes from the C4 distillation unit into a mixed butanol product stream.

12. The system as in claim 9 , wherein the naphtha hydrotreating zone is operable to produce a C5s stream, and further comprising a metathesis reaction zone operable to receive and convert all or a portion of the C5s stream into a propylene stream, and a C4/C5 raffinate stream, and wherein the MFSC zone is operable to receive and thermally crack the C4/C5 raffinate stream.

13. The system as in claim 9 , wherein the naphtha hydrotreating zone is operable to produce a C5s stream, and further comprising a metathesis reaction zone operable to receive and convert all or a portion of the C5s stream into a propylene stream, and a C4/C5 raffinate stream; and a mixed butanols production zone operable to receive and convert a mixture of butenes from the C4 distillation unit into a mixed butanol product stream and an alkanes stream; wherein the MFSC zone is operable to receive and thermally crack the non-olefinic stream and the C4/C5 raffinate stream.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Ghamdi Mohammed Saeed

Classifications

• Y02P20/10

  Process efficiency · CPC title

• C10G69/00 Primary

  Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process (C10G67/00 takes precedence) · CPC title

• B01J19/2445

  placed in parallel · CPC title

• C10L1/08

  for compression ignition · CPC title

• C10G2400/30

  Aromatics · CPC title