Red mud as a catalyst for the isomerization of olefins

Patent metadata

Field	Value
Publication number	US-11420915-B2
Application number	US-202016899254-A
Country	US
Kind code	B2
Filing date	Jun 11, 2020
Priority date	Jun 11, 2020
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A systems and a method for isomerizing a feedstock to form an alpha-olefin product stream are provided. An exemplary method includes calcining the red mud, flowing an olefin feedstock over the red mud in an isomerization reactor, and separating the alpha-olefin from a reactor effluent.

First claim

What is claimed is:

1. A method for isomerization of olefins comprising:
calcining a red mud catalyst;
isomerizing an olefin feedstock over the calcined red mud catalyst in a reactor to form an effluent; and
separating the effluent to obtain an alpha-olefin stream and an alpha-olefin depleted stream.

2. The method of claim 1 , wherein the olefin feedstock comprises 2-butene and the effluent comprises 1-butene.

3. The method of claim 1 , wherein the calcining is conducted to dry the catalyst, remove volatile gases, or both, at a temperature of between about 500° C. and about 800° C. for between about 10 minutes and about 150 minutes.

4. The method of claim 1 , wherein the calcining is conducted to dry the catalyst, remove volatile gases, or both, at a temperature of between about 600° C. and about 700° C. for between about 30 minutes and about 130 minutes.

5. The method of claim 1 , wherein the calcining is conducted to dry the catalyst, remove volatile gases, or both, at a temperature of about 650° C. for about 45 minutes.

6. The method of claim 1 , further comprising activating the calcined catalyst at a temperature of between about 400° C. and about 700° C. for between about 2 hours and about 6 hours.

7. The method of claim 1 , further comprising activating the calcined catalyst at a temperature of between about 500° C. and about 600° C. for between about 3 hours and about 5 hours.

8. The method of claim 1 , further comprising activating the calcined catalyst at a temperature of about 650° C. for about 4 hours.

9. The method of claim 1 , wherein the olefin feedstock is obtained from an upstream purification system in a refinery.

10. The method of claim 1 , wherein the olefin feedstock has a boiling point range of between about −30° C. and about 40° C. and comprises butene.

11. The method of claim 1 , wherein the olefin feedstock has a boiling point range of between about −20° C. and about 10° C. and comprises butene.

12. The method of claim 1 , wherein the olefin feedstock has a boiling point range of between about −10° C. and about 0° C. and comprises butene.

13. The method of claim 1 , further comprising flowing the feedstock over the red mud at a weight hour space velocity of between about 400 hr −1 and 1300 hr −1 .

14. The method of claim 1 , further comprising flowing the feedstock over the red mud at a weight hour space velocity of between about 650 hr −1 and 1150 hr −1 .

15. The method of claim 1 , further comprising flowing the feedstock over the red mud at a weight hour space velocity of about 900 hr −1 .

16. The method of claim 1 , wherein the separating is performed in a distillation column.

17. The method of claim 1 , wherein the alpha-olefin stream comprises 1-butene and the separating is performed in a distillation column.

18. The method of claim 1 , further comprising passing the alpha-olefin depleted stream to an upstream purification system.

19. The method of claim 1 , further comprising combining the alpha-olefin depleted stream with the olefin feedstock.

Assignees

• Saudi Arabian Oil Co

Inventors

• Fadhel Bandar A
• Albuali Mohammed A
• Bamagain Rami
• Mohammad Thamer
• Khokhar Munir D
• Al Sadat Wajdi Issam

Classifications

• B01J23/78

  with alkali- or alkaline earth metals · CPC title

• B01J37/088

  Decomposition of a metal salt · CPC title

• C07C5/2512

  with metal oxides · CPC title

• B01J37/08 Primary

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J19/00

  Chemical, physical or physico-chemical processes in general; Their relevant apparatus · CPC title