IP Library › Granted Patent US 12692211
Granted Patent B2
US 12692211 · App. 18/417,167 · Granted Jul 28, 2026

Process for preparing an olefin stream for oligomerization with acetylene conversion

Inventors: Andrew Piotrowski (Chicago, IL); Ernest J. Boehm (Hanover Park, IL); John J. Senetar (Naperville, IL); Matthew C. Cole (Evanston, IL); Jeannie Mee Blommel (Oregon, WI); Christopher Procopi (Glenco, IL); Ian G. Horn (Streamwood, IL); Andrew B. Chin (Wilmette, IL)
Assignee: UOP LLC
C07C5/08
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Quick Facts
Patent No.
US 12692211
App. No.
18/417,167
Granted
Jul 28, 2026
Kind
B2
Abstract

A process for preparing an olefin stream for oligomerization comprises fractionating an olefin stream to provide an ethylene stream and a olefin rich stream. Acetylenes in the ethylene stream are converted to ethylene in the presence of hydrogen to provide a concentrated ethylene stream that can be oligomerized.

Claims (34)

1 . A process for processing an olefin stream comprising:

fractionating an olefin stream to provide an ethylene stream and an olefin rich stream;

converting acetylenes in said ethylene stream to ethylene in the presence of hydrogen to provide a concentrated ethylene stream; and

oligomerizing said concentrated ethylene stream.

2 . The process of claim 1 further comprising absorbing oxygenates from said olefin rich stream into a water wash stream to provide an oxygenate rich water wash stream and a washed olefin rich stream; and oligomerizing said washed olefin rich stream.

3 . The process of claim 2 wherein said concentrated ethylene stream and said washed olefin rich stream are oligomerized together.

4 . The process of claim 1 wherein the step of fractionating said olefin stream further comprises fractionating said olefin stream to provide a light gas stream and a demethanized olefin rich stream and fractionating said demethanized olefin rich stream to provide said ethylene stream and said olefin rich stream.

5 . The process of claim 4 further comprising absorbing oxygenates from said olefin rich stream into a water wash stream to provide an oxygenate rich water wash stream and a washed olefin rich stream; and oligomerizing said washed olefin rich stream.

6 . The process of claim 1 further comprising absorbing oxygenates from an oxygenated olefin stream into a water wash stream to provide an oxygenate rich water wash stream and said olefin rich stream.

7 . The process of claim 6 further comprising oligomerizing said olefin rich stream.

8 . The process of claim 7 further comprising oligomerizing said olefin rich stream and said concentrated ethylene stream together.

9 . The process of claim 1 wherein said olefin rich stream comprises C3 to C8 olefins.

10 . The process of claim 4 wherein said light gas stream includes carbon oxide, nitrogen and hydrogen.

11 . The process of claim 1 further comprising selectively hydrogenating said olefin rich stream in the presence of hydrogen to convert dienes and acetylene to mono-olefins prior to said oligomerizing step.

12 . The process of claim 1 further comprising adsorbing oxygenates from said olefin rich stream prior to said oligomerizing step.

13 . The process of claim 1 wherein said olefin rich stream is an olefin rich stream.

14 . The process of claim 1 wherein the olefin stream is taken from an oxygenate conversion reactor.

15 . The process of claim 2 wherein said absorbed oxygenates comprise dimethyl ether, methanol, and acetaldehyde.

16 . The process of claim 2 further comprising

compressing a gaseous olefin stream to provide a compressed olefin stream;

stripping said compressed olefin stream to provide a light olefinic stream and a heavy olefinic stream; and

oligomerizing said heavy olefinic stream with said washed olefin rich stream.

17 . A process for processing an olefin stream comprising:

fractionating an olefin stream to provide an ethylene stream and an olefin rich stream;

converting acetylenes in said ethylene stream to ethylene in the presence of hydrogen to provide a concentrated ethylene stream;

absorbing oxygenates from said olefin rich stream into a water wash stream to provide an oxygenate rich water wash stream and a washed olefin rich stream; and

oligomerizing said concentrated ethylene stream and said washed olefin rich stream.

18 . The process of claim 17 further comprising selectively hydrogenating said olefin rich stream in the presence of hydrogen to convert dienes and acetylene to mono-olefins prior to said oligomerizing step.

19 . A process for processing an olefin stream comprising:

fractionating an olefin stream to provide to provide a light gas stream and a olefin rich stream;

fractionating said olefin rich stream to provide an ethylene stream and a olefin rich stream;

converting acetylenes in said ethylene stream to ethylene in the presence of hydrogen to provide a concentrated ethylene stream; and

oligomerizing said concentrated ethylene stream.

20 . The process of claim 19 further comprising absorbing oxygenates from said olefin rich stream into a water wash stream to provide an oxygenate rich water wash stream and a washed olefin rich stream; and oligomerizing said washed olefin rich stream.