RU-2026112264-A - Methods of Separating Hydrocarbons

Inventors

• Чжан, Юэ
• САЙЯР, Бахарех
• ХОЛДЕРНЕСС, Джон
• ДИЛЛОН, Джон Дж.
• МАКНИЛИ, Адам М.
• ПРЕЦ, Мэттью Т.

Assignees

• ДАУ ГЛОБАЛ ТЕКНОЛОДЖИС ЛЛК

Dates

Publication Date

20260505

Application Date

20241023

Priority Date

20231030

Claims (20)

1. 1. A method for separating a mixed feed stream, including:
2. separating the mixed feed stream into a light fraction and a heavy fraction in a first separator, wherein the mixed feed stream contains C3 olefins and C3 paraffins;
3. compression of the light fraction to form the first compressed light fraction;
4. further compression of the first portion of the first compressed light fraction to form a second compressed light fraction;
5. cooling the second compressed light fraction to at least partially condense the second compressed light fraction to form a cooled second compressed light fraction;
6. passing a first portion of the cooled second compressed light fraction into a second separator, wherein the second portion of the cooled second compressed light fraction is a product stream;
7. separating the first portion of the cooled second compressed light fraction into a vapor stream and a liquid stream in a second separator;
8. combining the vapor stream with the second portion of the first compressed light fraction to form a combined stream;
9. passing the combined stream into a first heat exchanger to form a cooled combined stream by heat exchange with at least a portion of the heavy fraction;
10. further cooling of the cooled combined stream in a second heat exchanger to form a supercooled combined stream;
11. combining the liquid stream with the supercooled combined stream to form a reflux stream; and
12. passing the irrigation flow into the first separator.
13. 2. The method of claim 1, further comprising passing a stream containing one or more alkanes into a second heat exchanger to provide cooling to the second heat exchanger.
14. 3. The method of claim 2, wherein the stream containing one or more alkanes contains C3 alkanes.
15. 4. The method according to claim 2 or 3, further comprising evaporating at least a portion of the stream containing one or more alkanes before passing the stream containing one or more alkanes to the second heat exchanger.
16. 5. The method according to any one of paragraphs 2-4, further comprising passing a stream containing one or more alkanes into the reactor.
17. 6. The method according to any one of paragraphs 1-5, in which the light fraction is passed directly from the first separator to the first compressor.
18. 7. The method according to any one of claims 1 to 6, wherein the light fraction contains 75% by weight or more propylene.
19. 8. The method according to any one of paragraphs 1-7, wherein the heavy fraction contains 50% by weight or more propane.
20. 9. The method according to any one of paragraphs 1-8, in which a cooling medium is used to cool the second compressed light fraction, and the cooling medium has a temperature of from 10 °C to 70 °C.