Process for hydroprocessing a biorenewable feedstock

Patent metadata

Field	Value
Publication number	US-2025011665-A1
Application number	US-202418754710-A
Country	US
Kind code	A1
Filing date	Jun 26, 2024
Priority date	Jul 6, 2023
Publication date	Jan 9, 2025
Grant date	—

Abstract

A process for hydroprocessing a biorenewable feedstock is disclosed. The process comprises hydrotreating the biorenewable feed stream in a hydrotreating reactor to hydrodeoxygenate the biorenewable feed stream to provide a hydrotreated stream. A hydrocracking feed stream taken from the hydrotreated stream is hydrocracked in a hydrocracking reactor to provide a hydrocracked stream. A hydroisomerization feed stream taken from the hydrotreated stream is hydroisomerized in a hydroisomerization reactor to provide a hydroisomerized stream. The hydroisomerized stream is separated to provide a jet fuel stream and a diesel stream. The diesel stream is separated into a first recycle diesel stream and a second recycle diesel stream. The first recycle diesel stream is passed to the hydrocracking reactor and the second recycle diesel stream is passed to the hydroisomerization reactor.

First claim

1 . A process for hydroprocessing a biorenewable feedstock, the process comprising:
hydrotreating said biorenewable feed stream in the presence of hydrogen over a hydrotreating catalyst in a hydrotreating reactor to hydrodeoxygenate said biorenewable feed stream to provide a hydrotreated stream; hydrocracking a hydrocracking feed stream taken from said hydrotreated stream in a hydrocracking reactor in the presence of hydrogen over a hydrocracking catalyst to provide a hydrocracked stream; hydroisomerizing a hydroisomerization feed stream taken from said hydrotreated stream in an hydroisomerization reactor in the presence of hydrogen over a hydroisomerization catalyst to provide a hydroisomerized stream; separating a jet fuel stream and a diesel stream from said hydroisomerized stream; separating said diesel stream into a first recycle diesel stream and a second recycle diesel stream; passing said first recycle diesel stream to the hydrocracking reactor; and passing said second recycle diesel stream to the hydroisomerization reactor.

2 . The process of claim 1 wherein said second recycle diesel stream bypasses the hydrocracking reactor.

3 . The process of claim 1 wherein the hydrocracking reactor and the hydroisomerization reactor are located in a single vessel.

4 . The process of claim 3 further comprises:
passing said first recycle diesel stream to the hydrocracking reactor to provide said hydrocracked stream; and
passing said hydrocracked stream and said second recycle diesel to the hydroisomerization reactor to provide said hydroisomerized stream.

5 . The process of claim 1 further comprises:
measuring one or both of a density and a viscosity of said jet fuel stream; and
setting the flow rate of said first recycle diesel stream and the flow rate of said second recycle diesel stream based on a measured value of one or both of the density and the viscosity of said jet fuel stream.

6 . The process of claim 3 wherein the hydrocracking reactor is at a location above the hydroisomerization reactor in the vessel.

7 . The process of claim 1 further comprises:
mixing said diesel stream with a make-up hydrogen stream to provide a mixed diesel stream; and
separating said mixed diesel stream to provide said first recycle diesel stream and said second recycle diesel stream.

8 . The process of claim 3 further comprises passing a hydrogen stream to a location between the hydrocracking reactor and the hydroisomerization reactor in the vessel.

9 . The process of claim 5 further comprising controlling recycling of said diesel stream to the hydrocracking reactor and the hydroisomerization reactor by:
measuring one or both of a density and a viscosity of said jet fuel stream;
comparing a measured value of one or both of the density and the viscosity of said jet fuel stream with a set point value of one or both of the density and the viscosity of said jet fuel stream to determine a first proportion of the diesel stream fed into said first recycle diesel stream and a second proportion of the diesel stream fed into said second recycle diesel stream;
passing said first recycle diesel stream to a hydrocracking catalyst bed located in the hydrocracking reactor; and
passing said second recycle diesel stream to an hydroisomerization catalyst bed located in the hydroisomerization reactor.

10 . The process of claim 1 wherein said first recycle diesel stream comprises from 10 wt % about to about 90 wt % of said diesel stream and said second recycle diesel stream comprises from about 90 wt % to about 10 wt % of said diesel stream.

11 . The process of claim 4 wherein the hydrocracking reactor is operating at a first liquid hourly space velocity and the hydroisomerization reactor is operating at a second liquid hourly space velocity, and wherein the first liquid hourly space velocity is higher or equal to the second liquid hourly space velocity.

12 . A process for hydroprocessing a biorenewable feedstock, the process comprising:
hydrotreating said biorenewable feed stream in the presence of hydrogen over a hydrotreating catalyst in a hydrotreating reactor to hydrodeoxygenate said biorenewable feed stream to provide a hydrotreated stream; hydrocracking a hydrocracking feed stream taken from said hydrotreated stream in a hydrocracking reactor in the presence of hydrogen over a hydrocracking catalyst to provide a hydrocracked stream; hydroisomerizing a hydroisomerization feed stream taken from said hydrotreated stream in an hydroisomerization reactor in the presence of hydrogen over a hydroisomerization catalyst to provide a hydroisomerized stream; separating a jet fuel stream and a diesel stream from said hydroisomerized stream; measuring one or both of a density and a viscosity of said jet fuel stream; separating said diesel stream into said first recycle diesel stream and said second recycle diesel stream; setting the flow rate of said first recycle diesel stream and the flow rate of said second recycle diesel stream based on a measured value of one or both of the density and the viscosity of said jet fuel stream; passing said first recycle diesel stream to the hydrocracking reactor; and passing said second recycle diesel stream to the hydroisomerization reactor.

13 . The process of claim 12 wherein said first recycle diesel stream comprises from about 10 wt % to about 90 wt % of said diesel stream and said second recycle diesel stream comprises from about 90 wt % to about 10 wt % of said diesel stream.

14 . The process of claim 12 wherein the hydrocracking reactor and the hydroisomerization reactor are located in a single vessel.

15 . The process of claim 14 wherein the hydrocracking reactor is placed at a location above the hydroisomerization reactor in the vessel.

16 . The process of claim 15 wherein said second recycle diesel stream bypasses the hydrocracking reactor.

17 . The process of claim 15 further comprises:
passing said first recycle diesel stream to the hydrocracking reactor to provide said hydrocracked stream; and
passing said hydrocracked stream and said second recycle diesel to the hydroisomerization reactor to provide said hydroisomerized stream.

18 . The process of claim 15 wherein the hydrocracking reactor is operating at a first liquid hourly space velocity and the hydroisomerization reactor is operating at a second liquid hourly space velocity, and wherein the first liquid hourly space velocity is higher or equal to the second liquid hourly space velocity.

19 . The process of claim 12 further comprises:
mixing said diesel stream with a make-up hydrogen stream to provide a mixed diesel stream; and
separating said mixed diesel stream to provide said first recycle diesel stream and said second recycle diesel stream.

20 . A process for hydroprocessing a biorenewable feedstock, the process comprising:
hydrotreating said biorenewable feed stream in the presence of hydrogen over a hydrotreating catalyst in a hydrotreating reactor to hydrodeoxygenate said biorenewable feed stream to provide a hydrotreated stream; hydrocracking a hydrocracking feed stream taken from said hydrotreated stream in a hydrocracking reactor in the presence of hydrogen over a hydrocracking catalyst to provide a hydrocracked stream; hydroisomerizing a hydroisomerization feed stream taken from said hydrotreated stream in an hydroisomerization reactor in the presence of hydrogen over a hydroisomerization catalyst to provide a hydroisomerized stream; separating a jet fuel stream

Assignees

• Uop Llc

Inventors

• Dalal Vikrant Vilasrao
• Srivastava Gaurav
• Bose Arunim
• Frey Stanley Joseph
• Jeroro Eseoghene

Classifications

• C10G45/58

  to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins (C10G32/00 takes precedence; improving or increasing the octane number or aromatic content of naphtha C10G35/00) · CPC title

• C10G2400/04

  Diesel oil · CPC title

• C10G2400/08

  Jet fuel · CPC title

• C10G2300/4081

  Recycling aspects · CPC title

• C10G2300/4018

  Spatial velocity, e.g. LHSV, WHSV · CPC title