Selective series-flow hydroprocessing system

Patent metadata

Field	Value
Publication number	US-9920265-B2
Application number	US-201715400310-A
Country	US
Kind code	B2
Filing date	Jan 6, 2017
Priority date	Jul 29, 2011
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Aromatic extraction and hydrocracking processes are integrated to optimize the hydrocracking units design and/or performance. By processing aromatics-rich and aromatic-lean fractions separately, the hydrocracking operating severity and or catalyst reactor volume requirement decreases.

First claim

What is claimed is:

1. An integrated apparatus for processing heavy hydrocarbon feedstocks to produce clean transportation fuels comprising:
an aromatic separation zone operable to extract aromatic compounds from the hydrocarbon feedstock, the aromatic separation zone including an inlet for receiving the hydrocarbon feedstock, an aromatic-rich outlet and an aromatic-lean outlet;
a series-flow hydroprocessing reaction zone having a first stage hydroprocessing reaction zone and a second stage hydroprocessing reaction zone, the series-flow hydroprocessing reaction zone including
the first vessel of a first stage hydroprocessing reaction zone having an inlet in fluid communication with the aromatic-rich outlet and an outlet for discharging first vessel first stage hydroprocessing reaction zone effluent,
a second vessel of the first stage hydroprocessing reaction zone having an inlet in fluid communication with the aromatic-lean outlet, and an outlet for discharging second vessel first stage hydroprocessing reaction zone effluent, and
the second stage hydroprocessing reaction zone having an inlet in fluid communication with both the first vessel first stage hydroprocessing reaction zone effluent and the second vessel first stage hydroprocessing reaction zone effluent, and an outlet for discharging second stage hydroprocessing reaction zone effluent; and

a fractionating zone having an inlet in fluid communication with the second stage hydroprocessing reaction zone effluent, one or more outlets for discharging product and one or more outlets for discharging bottoms.

2. The system of claim 1 , wherein the aromatic separation zone includes a mixer-settler apparatus.

3. The system of claim 1 , wherein the aromatic separation zone includes a centrifugal contactor.

4. The system of claim 1 , wherein the aromatic separation zone includes a contacting column.

5. The system of claim 4 , wherein the contacting column is a tray column.

6. The system of claim 4 , wherein the contacting column is a packed bed column.

7. The system of claim 4 , wherein the contacting column is a rotating disc contactor.

8. The system of claim 4 , wherein the contacting column is a pulse column.

Assignees

• Saudi Arabian Oil Co

Inventors

• Koseoglu Omer Refa

Classifications

• C10G65/14

  plural parallel stages only · CPC title

• C10G2300/202

  Heteroatoms content, i.e. S, N, O, P · CPC title

• C10G67/14 Primary

  including at least two different refining steps in the absence of hydrogen · CPC title

• C10G65/02

  plural serial stages only · CPC title

• C10G67/0418

  The hydrotreatment being a hydrorefining · CPC title