Claims
- 1. A catalyst prepared by:
providing a zeolite carrier; providing a cupric salt aqueous solution; and defining a copper zeolite catalyst by carrying out an ion exchange reaction between copper ions and said zeolite carrier in said cupric salt aqueous solution at a temperature of from about 4° C. to about 25° C.
- 2. The catalyst of claim 1 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 3. The catalyst of claim 1 wherein said copper zeolite catalyst comprises a copper content of from about 0.1% to about 10.0% by weight.
- 4. The catalyst of claim 3 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 5. The catalyst of claim 1 wherein said defining a copper zeolite catalyst further comprises the step of calcining said copper zeolite catalyst at a temperature of from about 300° C. to about 700° C.
- 6. The catalyst of claim 5 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 7. The catalyst of claim 5 wherein said copper zeolite catalyst comprises a copper content of from about 0.1% to about 10.0% by weight.
- 8. The catalyst of claim 7 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 9. A catalyst prepared by:
providing a zeolite carrier having a silicon/aluminum mole ratio of from about 14 to about 30; providing a cupric salt aqueous solution having a concentration of from about 0.001 molar to about 10 molar; defining a copper zeolite catalyst by carrying out an ion exchange reaction between copper ions and said zeolite carrier in said cupric salt aqueous solution at a temperature of from about 4° C. to about 25° C.; and calcinating said copper zeolite catalyst at a temperature of from about 300° C. to about 700° C.
- 10. The catalyst of claim 9 wherein said cupric salt aqueous solution is copper sulfate, copper nitrate, copper acetate or copper chloride.
- 11. The catalyst of claim 9 wherein said copper zeolite catalyst comprises a copper content of from about 2.5% to about 3.5% by weight.
- 12. A process for preparing a catalyst, comprising the steps of:
providing a zeolite carrier; providing a cupric salt aqueous solution; defining a copper zeolite catalyst by carrying out an ion exchange reaction between copper ions and said zeolite carrier in said cupric salt aqueous solution at a temperature of from about 4° C. to about 25° C.; and calcinating said copper zeolite catalyst.
- 13. The process of claim 12 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 14. The process of claim 12 wherein said copper zeolite catalyst comprises a copper content of from about 0.1% to about 10.0% by weight.
- 15. The process of claim 14 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 16. The process of claim 12 wherein said calcining said copper zeolite catalyst comprises calcining said copper zeolite catalyst at a temperature of from about 300° C. to about 700° C.
- 17. The process of claim 16 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 18. The process of claim 16 wherein said copper zeolite catalyst comprises a copper content of from about 0.1% to about 10.0% by weight.
- 19. The process of claim 12 wherein said cupric salt aqueous solution is copper sulfate, copper nitrate, copper acetate or copper chloride having a concentration of from about 0.001 molar to about 10 molar.
- 20. The process of claim 19 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 21. The process of claim 19 wherein said calcining said copper zeolite catalyst comprises calcining said copper zeolite catalyst at a temperature of from about 300° C. to about 700° C.
- 22. A process for removing nitrogen oxides from a gaseous medium, comprising the steps of:
providing a catalyst prepared by providing a cupric salt aqeous solution, providing a zeolite carrier, and causing an ion exchange reaction between copper ions and said zeolite carrier in said cupric salt aqueous solution at a temperature of from about 4° C. to about 25° C.; defining a gaseous mixture by providing a reducing agent and mixing said reducing agent with said gaseous medium; and passing said gaseous mixture through said catalyst.
- 23. The process of claim 22 wherein said reducing agent is ammonia or urea.
- 24. The process of claim 22 wherein said cupric salt aqueous solution is copper sulfate, copper nitrate, copper acetate or copper chloride having a concentration of from about 0.001 molar to about 10 molar.
- 25. The process of claim 22 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 95.
- 26. The process of claim 22 wherein said catalyst has a copper content of from about 0.1% to about 10.0% by weight.
- 27. The process of claim 22 wherein said catalyst is prepared by further calcining said catalyst at a temperature of from about 300° C. to about 700° C.
- 28. The process of claim 22 wherein said passing said gaseous mixture through said catalyst comprises passing said gaseous mixture through said catalyst at a temperature of from about 150° C. to about 500° C. and a spatial velocity of from about 1000 hr−1 to about 400,000 hr−1.
- 29. A copper zeolite catalyst comprising:
a zeolite carrier having a silicon/aluminum mole ratio of from about 14 to about 95; and copper provided on said zeolite carrier in a quantity of from about 0.1% to about 10.0% by weight.
- 30. The copper zeolite catalyst of claim 29 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 30.
- 31. The copper zeolite catalyst of claim 29 wherein said copper is provided on said zeolite carrier in a quantity of from about 2.5% to about 3.5% by weight.
- 32. The copper zeolite catalyst of claim 31 wherein said zeolite carrier has a silicon/aluminum mole ratio of from about 14 to about 30.
- 33. A zeolite carrier comprising a silicon/aluminum mole ratio of from about 14 to about 95.
- 34. The zeolite carrier of claim 33 wherein said silicon/ aluminum mole ratio is from about 14 to about 30.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2003-0012400 |
Feb 2003 |
KR |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority of U.S. Provisional Application Serial No. 60/474,492 filed May 30, 2003.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60474492 |
May 2003 |
US |