IP Library › Granted Patent US 8,076,506
Granted Patent B2
US 8,076,506 · App. 12/226,096 · Granted Dec 13, 2011

Process for the reduction of aldehyde concentration in a target stream

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Quick Facts
Patent No.
US 8,076,506
App. No.
12/226,096
Granted
Dec 13, 2011
Kind
B2
Abstract

A process for reducing the aldehyde concentration in a target stream of a carbonylation process is disclosed. More specifically, a process for reducing the aldehyde concentration in an internal process stream or feed stream of a carbonylation process is disclosed. In particular, a process in which a target stream comprising a carbonylatable reactant and a first aldehyde concentration is subjected to a reaction comprising a supported catalyst that comprises at least one Group 8 to Group 11 metal at conditions sufficient to reduce the first aldehyde concentration to a second aldehyde concentration is disclosed.

Claims (46)

1. A process comprising: contacting a gas phase target stream that comprises a carbonylatable reactant and a first aldehyde concentration with a supported catalyst that comprises at least one Group 8 to Group 11 metal at conditions sufficient to reduce the first aldehyde concentration to a second aldehyde concentration.

2. The process of claim 1 , wherein the carbonylatable reactant comprises at least one member selected from the group consisting of methanol, methyl acetate, methyl formate, and dimethyl ether.

3. The process of claim 1 , wherein the target stream comprises a target stream of a carbonylation process.

4. The process of claim 3 , wherein the target stream comprises a process stream of the carbonylation process.

5. The process of claim 3 , wherein the target stream comprises a feed stream of the carbonylation process.

6. The process of claim 1 , wherein the first aldehyde concentration comprises acetaldehyde.

7. The process of claim 1 , wherein the support comprises carbon.

8. The process of claim 1 , wherein the support comprise carbon from coconut.

9. The process of claim 1 , wherein the metal comprises at least one Group 8 to Group 10 metal.

10. The process of claim 1 , wherein the metal comprises at least one Group 10 metal.

11. The process of claim 1 , wherein the metal comprises at least palladium.

12. The process of claim 1 , wherein the metal comprises at least platinum.

13. The process of claim 1 , wherein the conditions comprise an oxidation regime.

14. The process of claim 1 , wherein the conditions comprise a decomposition regime.

15. The process of claim 1 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 0.5.

16. The process of claim 1 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 1.

17. The process of claim 1 , further comprising regenerating the catalyst.

18. A process comprising: contacting a target stream of a carbonylation process comprising a first aldehyde concentration in the gas phase with a supported catalyst comprising at least one Group 8 to Group 11 metal within a reaction vessel at conditions sufficient to produce a treated stream having a second aldehyde concentration that is less than the first aldehyde concentration; and removing the treated stream from the reaction vessel.

19. The process of claim 18 , wherein the carbonylatable reactant comprises at least one member selected from the group consisting of methanol, methyl acetate, methyl formate, and dimethyl ether.

20. The process of claim 18 , wherein the target stream comprises a process stream of the carbonylation process.

21. The process of claim 18 , wherein the target stream comprises a feed stream of the carbonylation process.

22. The process of claim 18 , wherein the first aldehyde concentration comprises acetaldehyde.

23. The process of claim 18 , wherein the support comprises carbon.

24. The process of claim 18 , wherein the support comprise carbon from coconut.

25. The process of claim 18 , wherein the metal comprises at least one Group 8 to Group 10 metal.

26. The process of claim 18 , wherein the metal comprises at least one Group 10 metal.

27. The process of claim 18 , wherein the metal comprises at least palladium.

28. The process of claim 18 , wherein the metal comprises at least platinum.

29. The process of claim 18 , wherein the conditions comprise an oxidation regime.

30. The process of claim 18 , wherein the conditions comprise a decomposition regime.

31. The process of claim 18 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 0.5.

32. The process of claim 18 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 1.

33. The process of claim 18 , further comprising regenerating the catalyst.

34. A process comprising: providing a gas phase feed stream of a carbonylation process comprising a carbonylatable reactant and a first aldehyde concentration to a reaction vessel containing a supported catalyst comprising at least one Group 8 to Group 11 metal; contacting the gas phase feed stream with the supported catalyst within the reaction vessel at conditions sufficient to produce a treated stream comprising a second aldehyde concentration that is less than the first aldehyde concentration; and removing the treated stream from the reaction vessel.

35. The process of claim 34 , wherein the first aldehyde concentration comprises acetaldehyde.

36. The process of claim 34 , wherein the support comprises carbon.

37. The process of claim 34 , wherein the support comprise carbon from coconut.

38. The process of claim 34 , wherein the metal comprises at least one Group 8 to Group 10 metal.

39. The process of claim 34 , wherein the metal comprises at least one Group 10 metal.

40. The process of claim 34 , wherein the metal comprises at least palladium.

41. The process of claim 34 , wherein the metal comprises at least platinum.

42. The process of claim 34 , wherein the conditions comprise an oxidation regime.

43. The process of claim 34 , wherein the conditions comprise a decomposition regime.

44. The process of claim 34 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 0.5.

45. The process of claim 34 , wherein the conditions comprise a molar ratio of oxygen feed to first aldehyde concentration greater than 1.

46. The process of claim 34 , further comprising regenerating the catalyst.