Process for Converting Olefins to Jet Fuel

Patent metadata

Field	Value
Publication number	US-2024218268-A1
Application number	US-202318401398-A
Country	US
Kind code	A1
Filing date	Dec 30, 2023
Priority date	Jan 4, 2023
Publication date	Jul 4, 2024
Grant date	—

Abstract

A process for dimerizing and oligomerizing olefins to distillate fuels which subjects oligomerized product to hydrocracking and hydroisomerization in a single reactor to convert heavier oligomers to jet fuel range oligomers. A jet fuel product stream may be taken from a side of a stripping column which produces a heavy drag stream from a bottom of the stripping column to ensure an end point boiling specification is achieved.

First claim

1 . A process for oligomerizing an olefin stream comprising:
dimerizing said olefin stream with a first-stage oligomerization catalyst to produce a first-stage oligomerized olefin stream; oligomerizing said first-stage oligomerized olefin stream with a second-stage oligomerization catalyst to provide a second-stage oligomerized stream; feeding said oligomerized stream to a jet fuel optimization reactor comprising two catalysts; and cracking and hydroisomerizing said second-stage oligomerized stream to provide a cracked oligomerized stream.

2 . The process of claim 1 further comprising hydrogenating said second-stage oligomerized olefin stream before cracking said second-stage oligomerized stream.

3 . The process of claim 1 further comprising separating said second-stage oligomerized stream into a light oligomerized stream and a heavy oligomerized stream and cracking said heavy oligomerized stream.

4 . The process of claim 3 further comprising hydrogenating said heavy oligomerized stream before cracking said heavy oligomerized stream.

5 . The process of claim 1 wherein the amount of cracking catalyst is greater than about 5 wt % and the amount of hydroisomerization catalyst is less than about 95 wt %.

6 . The process of claim 1 further comprising separating said cracked oligomerized stream to provide a vaporous cracked oligomerized stream and a liquid cracked oligomerized stream.

7 . The process of claim 6 further comprising stripping said liquid cracked oligomerized stream to provide a green jet stream.

8 . The process of claim 7 further comprising recycling a portion of said green jet stream to said dimerizing step.

9 . The process of claim 7 further comprising stripping said liquid cracked oligomerized stream to provide a heavy drag stream.

10 . The process of claim 8 further comprising cooling and separating said vaporous cracked oligomerized stream to provide a cold vaporous cracked oligomerized stream and a cold liquid cracked oligomerized stream and stripping said cold liquid cracked oligomerized stream with said liquid oligomerized stream.

11 . A process for oligomerizing an olefin stream comprising:
dimerizing said olefin stream with a first-stage oligomerization catalyst to produce a first-stage oligomerized olefin stream; oligomerizing said first-stage oligomerized olefin stream with a second-stage oligomerization catalyst to provide a second-stage oligomerized olefin stream; hydrogenating said second-stage oligomerized olefin stream to provide a hydrogenated oligomerized stream; feeding said oligomerized stream to a jet fuel optimization reactor comprising two catalysts; and cracking and hydroisomerizing said hydrogenated oligomerized stream to provide a cracked oligomerized stream.

12 . The process of claim 11 further comprising separating said second-stage oligomerized olefin stream into a light oligomerized olefin stream and a heavy oligomerized olefin stream and hydrogenating said heavy oligomerized olefin stream.

13 . The process of claim 11 wherein the amount of cracking catalyst in said jet fuel optimization reactor is greater than about 5 wt % and the amount of hydroisomerization catalyst is less than about 95 wt %.

14 . The process of claim 11 further comprising separating said cracked oligomerized stream to provide a vaporous cracked oligomerized stream and a liquid cracked oligomerized stream.

15 . The process of claim 14 further comprising stripping said liquid cracked oligomerized olefin stream to provide a green jet stream.

16 . The process of claim 15 further comprising recycling a portion of said green jet stream to said dimerizing step.

17 . The process of claim 7 further comprising stripping said liquid cracked oligomerized stream to provide a heavy drag stream.

18 . The process of claim 8 further comprising cooling and separating said vaporous cracked oligomerized stream to provide a cold vaporous cracked oligomerized stream and a cold liquid vaporous cracked oligomerized stream and stripping said cold liquid cracked oligomerized stream with said liquid oligomerized stream.

19 . A process for oligomerizing an olefin stream comprising:
dimerizing said olefin stream with a first-stage oligomerization catalyst to produce a first-stage oligomerized olefin stream; oligomerizing said first-stage oligomerized olefin stream with a second-stage oligomerization catalyst to provide a second-stage oligomerized olefin stream; hydrogenating said second-stage oligomerized olefin stream to provide a hydrogenated oligomerized stream; feeding said oligomerized stream to a jet fuel optimization reactor comprising two catalysts; and cracking and isomerizing said hydrogenated oligomerized stream to provide a cracked oligomerized stream.

20 . The process of claim 19 further comprising separating said second-stage oligomerized olefin stream into a light oligomerized olefin stream and a heavy oligomerized olefin stream and hydrogenating said heavy oligomerized olefin stream.

Assignees

• Uop Llc

Inventors

• Jadaun Krishan Pratap
• Dalal Vikrant Vilasrao
• Frey Stanley Joseph
• Bose Arunim
• Sharma Richa

Classifications

• C10G50/00

  Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation · CPC title

• C10G69/126

  polymerisation, e.g. oligomerisation · CPC title

• C10G57/02 Primary

  with polymerisation · CPC title

• C10G2400/08

  Jet fuel · CPC title

• C10G2300/1088

  Olefins · CPC title