Catalytic process for degradation of organic materials in aqueous and organic fluids to produce environmentally compatible products

• US 4,861,484 A
• Filed: 03/02/1988
• Issued: 08/29/1989
• Est. Priority Date: 03/02/1988
• Status: Expired due to Term

• Current Assignee: Synlize Incorporated, Trustees of Boston University
• Original Assignee: Synlize Incorporated
• Inventors: DiMauro, Thomas M., Svrluga, Richard C., Lichtin, Norman N.
• Primary Examiner(s): Wyse, Tom
• Application Number:
  US07/163,341
• Time in Patent Office: 545 Days
• Field of Search: 210/638, 210/639, 210/674, 210/694, 210/748, 210/759, 210/763, 210/762, 210/908-910, 210/677, 502/22-24, 502/28-33, 502/514, 502/518
• US Class Current: 210/638
• CPC Class Codes: B01J 21/063 Titanium; Oxides or hydroxides thereof
• CPC Class Codes: B01J 21/20 Regeneration or reactivation
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/722 Oxidation by peroxides
• CPC Class Codes: C02F 1/725 by catalytic oxidation
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2305/10 Photocatalysts
• CPC Class Codes: Y02W 10/37 using solar energy
• CPC Class Codes: Y10S 210/908 Organic
• CPC Class Codes: Y10S 502/518 Carbonaceous contaminant

Abstract

A novel catalytic process is provided for the controlled degradation of organic materials into environmentally compatible products comprising at least carbon dioxide. The process employs a solid catalyst comprising at least one transition element and a peroxide to form a reaction mixture with the organic material which is degraded in the presence of photoenergy absorbable by the catalyst. The catalytic process has multiple applications including the purification of organic solvents; the regeneration of granular activated carbon; the purification of potable water and industrial waste water; and the elimination of organic hazardous and/or toxic substances from collected wastes.

Claims

1. A catalytic process for the degradation of an undesired organic material into environmentally compatible products without need for pretreating the organic material to be degraded, said process comprising the steps of:

obtaining the undesired organic material to be degraded in a fluid state;

combining said fluid organic material in the presence of water with a solid catalyst comprising at least one transition element and a peroxide as a reaction mixture; and

adding photoenergy absorbable by said catalyst to said reaction mixture to yield environmentally compatible reaction products comprising at least carbon dioxide.

2. The catalytic process as recited in claim 1 wherein said fluid organic mixture is obtained by:

mixing the organic material to be degraded with a fluid carrier to form a fluid mixture; and

adding water to said fluid mixture.

3. The catalytic process as recited in claim 1 wherein said fluid organic material is obtained by mixing a water-containing organic material with a fluid carrier.

4. The catalytic process as recited in claim 1 wherein said fluid organic material is obtained as a fluid mixture of water and the organic material to be degraded.

5. The catalytic process as recited in claim 1 wherein said fluid organic material comprises an organic liquid.

6. The catalytic process as recited in claim 1 wherein the organic material to be degraded comprises a mixture of different compositions.

7. The catalytic process as recited in claim 6 wherein said mixture includes solid particulate matter.

8. The catalytic process as recited in claim 7 wherein said solid particulate matter comprises granular, activated carbon.

9. The catalytic process as recited in claim 1 wherein said organic material comprise synthetic materials.

10. The catalytic process as recited in claim 9 wherein said synthetic materials are selected from the group consisting of nylon, polyvinyl chloride, polyethylene, polypropylene, and polystyrene.

11. The catalytic process as recited in claim 1 wherein said fluid organic material comprises a detergent emulsified dispersion.

12. The catalytic process as recited in claim 1 wherein the organic material to be degraded comprises at least one toxic substance.

13. The catalytic process as recited in claim 1 wherein the organic material to be degraded comprises at least one non-toxic substance.

14. The catalytic process as recited in claim 1 wherein the organic material to be degraded comprises pollutants of water.

15. The catalytic process as recited in claim 1 wherein said photoenergy is selected from the group consisting of visible light wavelengths and ultraviolet light wavelengths.

16. The catalytic process as recited in claim 1 wherein at least one of said reaction products is in a gaseous state.

17. The catalytic process as recited in claim 1 wherein said solid catalyst comprises an oxide of a transition element.

18. The catalytic process as recited in claim 1 wherein said solid catalyst is titanium dioxide.

19. The catalytic process as recited in claim 1 wherein said peroxide is hydrogen peroxide.

20. A catalytic process for the purification of an organic solvent containing dissolved organic material without need for pretreating the organic solvent to be purified, said process comprising the steps of:

obtaining an organic solvent containing dissolved organic material as an undesired impurity;

combining said impure organic solvent in the presence of water with a solid catalyst comprising at least one transition element and a peroxide as a reaction mixture; and

adding photoenergy absorbable by said solid catalyst to said reaction mixture to yield a substantially purified organic solvent and environmentally compatible reaction products comprising at least carbon dioxide.

22. The process as recited in claim 20 or 21 wherein said solid catalyst is an oxide of a transition element.

23. The process as recited in claim 20 or 21 wherein said solid catalyst is titanium dioxide.

24. The process as recited in claim 20 or 21 wherein said peroxide is hydrogen peroxide.

25. The process as recited in claim 20 or 21 wherein said organic solvent is acetonitrile.

26. The process as recited in claim 20 or 21 wherein said organic solvent is selected from the group consisting of alkylnitriles, N-N-dimethylacrylamides, and dialkylsulfones.

21. An environmentally compatible process for regenerating granular activated carbon from exhausted granular activated carbon containing organic material, said process comprising the steps of:

mixing the exhausted, granular activated carbon with an organic solvent such that the organic material becomes dissolved in said organic solvent and granular activated carbon is regenerated in a form substantially free of adsorbed organic material;

separating said regenerated, granular activated carbon from said organic solvent containing dissolved organic material;

combining said separated organic solvent with water, a solid catalyst comprising at least one transition element, and a peroxide as a reaction mixture; and

adding photoenergy absorbable by said solid catalyst to said reaction mixture to yield an organic solvent substantially free of dissolved organic material and environmentally compatible reaction products comprising at least carbon dioxide.

27. An environmentally compatible process for purifying potable water and industrial waste water without need for pretreating the water to be purified, said process comprising the steps of:

obtaining water polluted with undesired dissolved organic material;

combining said polluted water with a solid catalyst comprising at least one transition element and a peroxide as a reaction mixture; and

adding photoenergy absorbable by said solid catalyst to said reaction mixture to yield substantially purified water and environmentally compatible reaction products comprising at least carbon dioxide.

31. The process as recited in claim 27 or 28 wherein said reaction mixture includes a detergent emulsified dispersion.

32. The process as recited in claim 27 or 28 wherein said solid catalyst is an oxide of a transition element.

33. The process as recited in claim 27 or 28 wherein said solid catalyst is titanium dioxide.

34. The process as recited in claim 27 or 28 wherein said peroxide is hydrogen peroxide.

28. An environmentally compatible process for purifying potable water and industrial waste water, said process comprising the steps of:

obtaining water polluted with organic material;

passing said polluted water through granular activated carbon such that said organic material is substantially adsorbed by said granular activated carbon and said water is substantially purified;

mixing said granular activated carbon containing adsorbed organic material with an organic solvent such that said organic material becomes dissolved in said organic solvent and said granular activated carbon is regenerated in a form substantially free of adsorbed organic material;

separating said regenerated, granular activated carbon from said organic solvent containing dissolved organic material;

combining said separated organic solvent with water, a solid catalyst comprising at least one transition element, and a peroxide as a reaction mixture; and

adding photoenergy absorbable by said solid catalyst to said reaction mixture to yield an organic solvent substantially free of dissolved organic material and environmentally compatible reaction products comprising at least carbon dioxide.

29. The process as recited in claim 28 wherein said organic solvent is acetonitrile.

30. The process as recited in claim 28 wherein said organic solvent is selected from the group consisting of alkylnitriles, N,N-dimethylacylamides, and dialkylsulfones.