Supported metal catalyst and use thereof for selective oxidation of glycerol

Patent metadata

Field	Value
Publication number	US-9745243-B2
Application number	US-201415027395-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 15, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A method for oxidation of glycerol into glyceric acid is described, which includes a step of treating glycerol with a supported metal catalyst in the presence of oxygen, said catalyst including platinum and a metal element selected from the group comprising tin, molybdenum, bismuth and a mixture thereof.

First claim

The invention claimed is:

1. A process for oxidation of glycerol to glyceric acid, the process comprising contacting glycerol with a metal catalyst in presence of oxygen, wherein the metal catalyst is supported by alumina, said metal catalyst comprising platinum and a metal element chosen from the group consisting of tin, molybdenum, and a mixture thereof.

2. The process as claimed in claim 1 , wherein the contacting is carried out in the presence of a base.

3. The process as claimed in claim 2 , wherein the base comprises sodium hydroxide.

4. The process as claimed in claim 2 , wherein the base consists of sodium hydroxide.

5. The process as claimed in claim 1 , wherein the contacting is carried out at a temperature from 15° C. to 100° C.

6. The process as claimed in claim 5 , wherein the temperature is from 20° C. to 60° C.

7. The process as claimed in claim 5 , wherein the temperature is from 28° C. to 60° C.

8. The process as claimed in claim 1 , wherein the metal catalyst comprises tin and platinum.

9. The process as claimed in claim 1 , wherein the glycerol is unrefined glycerol.

10. The process as claimed in claim 1 , wherein the contacting results in reaction products, wherein the products are predominantly glyceric acid and tartronic acid in yield percentage.

11. The process as claimed in claim 10 , further comprising separating glyceric acid and tartronic acid.

12. The process as claimed in claim 1 , further comprising separating reaction products resulting from the contacting.

13. The process as claimed in claim 1 , further comprising regenerating said catalyst before the contacting a regenerated supported metal catalyst with glycerol.

14. The process as claimed in claim 13 , wherein said regenerating comprises washing and drying the catalyst.

15. The process as claimed in claim 14 wherein the drying comprises heating at 105° C. for 24 hours.

16. A process for oxidation of glycerol to glyceric acid, the process comprising contacting glycerol with a supported metal catalyst in presence of oxygen, wherein the metal catalyst comprises molybdenum and platinum.

17. The process as claimed in claim 16 , wherein the metal catalyst further comprises tin.

18. The process as claimed in claim 16 , wherein the contacting is carried out in the presence of a base.

19. The process as claimed in claim 16 , wherein the glycerol is unrefined glycerol.

20. The process as claimed in claim 16 , further comprising regenerating said catalyst before the contacting a regenerated supported metal catalyst with glycerol.

Assignees

• Pivert
• Centre Nat De La Rech Scientique (Cnrs)
• Université Des Sciences Et Tech De Lille 1
• Centre Nat De La Rech Scient (Cnrs)

Inventors

• Capron Mickaeel
• Dumeignil Franck
• Skrzynska Elzbieta

Classifications

• C07C59/10

  Polyhydroxy carboxylic acids · CPC title

• C07C51/235 Primary

  of —CHO groups or primary alcohol groups · CPC title