METHOD OF TREATING EFFLUENTS CONTAINING HALOGENATED COMPOUNDS

• US 20130041200A1
• Filed: 04/06/2011
• Published: 02/14/2013
• Est. Priority Date: 04/07/2010
• Status: Active Grant

• Current Assignee: Centre National De La Recherche Scientifique, Université Claude Bernard Lyon 1
• Original Assignee: Centre National De La Recherche Scientifique, Université Claude Bernard Lyon 1
• Inventors: Sorokin, Alexander, Kudrik, Evgeny V.
• Granted Patent: US 8,884,093 B2
• Time in Patent Office: Days
• US Class Current: 588/316
• CPC Class Codes: B01J 2231/70 Oxidation reactions, e.g. epoxidation, (di)hydroxylation, dehydrogenation and analogues
• CPC Class Codes: B01J 2531/0216 Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp
• CPC Class Codes: B01J 2531/025 Ligands with a porphyrin ring system or analogues thereof, e.g. phthalocyanines, corroles
• CPC Class Codes: B01J 2531/842 Iron
• CPC Class Codes: B01J 31/1815 with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
• CPC Class Codes: C02F 1/722 Oxidation by peroxides
• CPC Class Codes: C02F 1/725 by catalytic oxidation
• CPC Class Codes: C02F 2101/12 Halogens or halogen-containing compounds
• CPC Class Codes: C02F 2101/14 Fluorine or fluorine-containing compounds

Abstract

The present invention relates to the use of catalysts of general formula (I):

(L₁)M₁-X-M₂(L₂)   (I)

wherein:

• • M₁ and M₂, either identical or different, represent metal atoms;
  • X represents a nitrogen atom;
  • L₁ and L₂, either identical or different are coordinated with M₁ and M₂, respectively, and represent ligands of the tetradentate type,
    • for catalytic oxidation of halogenated compounds.

Claims

1. A method of treatment of halogenated compounds comprising a step of catalytic oxidation of said halogenated compounds in the presence of an oxidizer and a catalyst of general formula (I):

(L₁)M₁-X-M₂(L₂)  

 

(I)

wherein;

M₁ and M₂, either identical or different, represent metal atoms;

X represents a nitrogen atom;

L₁ and L₂, either identical or different, are coordinated with M₁ and M₂, respectively and represent ligands of the tetradentate type.

2. The method according to claim 1, wherein the oxidizer is H₂O₂.

3. The method according to claim 1, wherein:

M₁ and M₂, either identical or different, represent an atom selected from the group consisting of transition metals;

X represents a nitrogen atom;

L₁ and L₂, either identical or different, fit the general formula (II);

4. The method according to claim 1, wherein:

M₁ and M₂, either identical or different, represent an atom selected from the group consisting of iron, copper, ruthenium, manganese, chromium, vanadium, osmium and cobalt.

12. The method according to claim 3, wherein R₁ and R₂ form, with the two carbon atoms to which they are bound, a phenyl group or a heterocycle containing one or two nitrogen atoms, substituted with one or more substituent selected from the group consisting of halogen, alkyl, alkoxy, nitro, carboxyl, hydroxyl, sulfone, sulfonic and sulfonate group.

13. The method according to claim 3, wherein Y represents a group CR, wherein R is an alkyl or a phenyl group, substituted with one or more substituent selected from the group consisting of halogen, alkyl, alkoxy, nitro, carboxyl, hydroxyl, sulfone, sulfonic and sulfonate group.

14. The method according to claim 3, wherein:

M₁ and M₂ both represent an iron atom;

R₁ and R₂ form, with the two carbon atoms to which they are bound, a phenyl group;

Y represents a nitrogen atom.

15. The method according to claim 14, wherein R₁ and R₂ form with the two carbon atoms to which they are bound, a phenyl group, substituted with one or more substituent selected from the group consisting of halogen, alkyl, alkoxy, nitro, carboxyl, hydroxyl, sulfone, sulfonic and sulfonate groups.

16. The method according to claim 1, wherein the halogenated compounds are comprised in effluents.

17. The method according to claim 16, comprising the following steps:

(a) putting the effluents, the oxidizer and the catalyst of formula (I) in the presence of each other; and

(b) catalytically oxidizing the halogenated compounds in order to obtain oxidized compounds.

18. The method according to claim 1, wherein the halogenated compounds comprise halogenated aromatic compounds.

19. The method according to claim 1, wherein the halogenated compounds comprise fluorinated aromatic compounds.

20. The method according to claim 1, wherein the halogenated compounds comprise halogenated aliphatic compounds.

21. The method according to claim 1, wherein the halogenated compounds comprise chlorinated aliphatic compounds.

22. The method according to claim 1, wherein the catalyst is supported.

23. The method according to claim 1, wherein the catalyst is supported on silica, aluminium oxide or coal.

5-11. -11. (canceled)