Catalysts utilizing carbon dioxide for the epoxidation of olefins

Patent metadata

Field	Value
Publication number	US-11123712-B2
Application number	US-201716320116-A
Country	US
Kind code	B2
Filing date	Jul 26, 2017
Priority date	Jul 26, 2016
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

The present disclosure provides mixed molybdenum oxide catalysts, methods for preparing epoxides from olefins and CO2 using them, and methods of making the mixed molybdenum oxide catalysts by impregnation or co-precipitation. In a preferred embodiment, the mixed molybdenum oxide catalysts are silver/molybdenum oxide catalysts, ruthenium/molybdenum oxide catalysts, or a combination thereof.

First claim

What is claimed is:

1. A method of catalyzing the abstraction of oxygen from carbon dioxide (CO 2 ) to form carbon monoxide (CO) comprising contacting a mixed molybdenum oxide catalyst, which comprises a silver oxide, a ruthenium oxide, or a mixture thereof,
wherein the molar ratio of the silver oxide or the ruthenium oxide to molybdenum oxide is in the range of 1.0 to 0.5 to 1.0 to 5.0,
with an appropriate CO 2 feed stream under suitable temperature and pressure conditions so as to abstract oxygen from the CO 2 to form CO.

2. The method of claim 1 wherein the mixed molybdenum oxide catalyst, further comprises a Group IA or Group IIA element promoter.

3. The method of claim 1 wherein the mixed molybdenum oxide catalyst, further comprises a support.

4. The method of claim 3 wherein the mixed molybdenum oxide catalyst, wherein the support is Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , A 1 PO 4 , carbon, graphite, or a mixture thereof.

5. The method of claim 1 wherein the mixed molybdenum oxide catalyst, wherein the mixed catalyst is a mixed silver/molybdenum oxide catalyst.

6. The method of claim 5 wherein the mixed silver/molybdenum oxide catalyst, wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 5.0.

7. The method of claim 6 wherein the mixed silver/molybdenum oxide catalyst, wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 4.0.

8. The method of claim 7 wherein the mixed silver/molybdenum oxide catalyst, wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 2.0.

9. The method of claim 8 wherein the mixed silver/molybdenum oxide catalyst, wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 1.0 to 1.0 to 3.0.

10. The method of claim 1 wherein the mixed molybdenum oxide catalyst, wherein the mixed catalyst is a mixed ruthenium/molybdenum oxide catalyst.

11. The method of claim 10 wherein the mixed ruthenium/molybdenum oxide catalyst, wherein the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 5.0.

12. The method of claim 11 wherein the mixed ruthenium/molybdenum oxide catalyst, wherein the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 4.0.

13. The method of claim 11 wherein the mixed ruthenium/molybdenum oxide catalyst, wherein the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 2.0.

14. The method of claim 13 wherein the mixed ruthenium/molybdenum oxide catalyst, wherein the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 3.0.

15. The method of claim 1 wherein the mixed molybdenum oxide catalyst, wherein the mixed catalyst is a mixed silver/ruthenium/molybdenum oxide catalyst.

16. The method of claim 15 wherein the mixed silver/ruthenium/molybdenum oxide catalyst wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 5.0 and the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 0.5 to 1.0 to 5.0.

17. The method of claim 16 wherein the mixed silver/ruthenium/molybdenum oxide catalyst wherein the molar ratio of Ag 2 O to MoO 3 is in the range of 1.0 to 1.0 to 1.0 to 4.0 and the molar ratio of RuO 2 to MoO 3 is in the range of 1.0 to 1.0 to 1.0 to 4.0.

18. The method of claim 1 , wherein the mixed molybdenum oxide catalyst, and the appropriate CO 2 feed stream are reacted together at the same time.

19. The method of claim 1 , wherein the mixed molybdenum oxide catalyst, and the appropriate CO 2 feed stream are reacted sequentially.

20. The method of claim 1 , wherein the mixed molybdenum oxide catalyst, and the appropriate CO 2 feed stream are reacted sequentially in a chemical looping process.

21. The method of claim 1 , wherein the mixed molybdenum oxide catalyst, and the appropriate CO 2 feed stream are reacted together in a fluidized bed.

Assignees

• Res Triangle Inst

Inventors

• Lail Marty
• Mobley Paul
• Peters Jonathan
• Akunuri Sree Nandita
• Hlebak Joshua J

Classifications

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• B01J37/033 Primary

  Using Hydrolysis · CPC title

• B01J29/0325

  Noble metals · CPC title

• B01J23/6525

  Molybdenum · CPC title

• B01J37/088

  Decomposition of a metal salt · CPC title