Claims
- 1. A monodispersed mesoporous aluminosilicate catalyst matrix material comprised of about 5 to 40% by weight alumina with the balance being silica, which matrix material is characterized (a) as having a pore size distribution from about 200 to about 500 Angstroms; and (b) a 0 ppm .sup.27 Al MASNMR peak after steaming at 1400.degree. F. for 16 hours, which is no more than 10% greater than any other MASNMR peak; and (c) no more than 40% of the surface area is lost after steaming at 1400.degree. F. for 16 hours.
- 2. The matrix material of claim 1 wherein the pore size distribution is from about 200 to 500 Angstroms.
- 3. A method for producing a monodispersed mesoporous aluminosilicate matrix material comprised of about 5 to 40% by weight of alumina with the balance being silica which matrix material is characterized by: (a) having a pore size distribution from about 200 to about 500 Angstroms, and (b) a 0 ppm .sup.27 Al MASNMR peak after steaming at 1400.degree. F. for 16 hours, which is no more than 10% greater than any other MASMNR peak, and (c) no more than 40% of the surface area is lost after steaming at 1400.degree. F. for 16 hours, which process comprises: (i) blending an effective amount of an acidic aluminum salt solution at a pH of about 2.5 to 6 with a monodispersed silica gel having an average particle size from about 200 to 500 Angstroms; (ii) adding to and further blending with the blend of (a) above, an effective amount of a basic solution to raise the pH of the resulting blend to about 3 to 9; and (iii) drying the blend at a temperature from about 80 to about 220.degree. C.
- 4. The method of claim 3 wherein the acidic aluminum salt is selected from the group consisting of aluminum sulfate, aluminum nitrate, and aluminum chloride.
- 5. The method of claim 4 wherein the acidic aluminum salt is aluminum sulfate.
- 6. The method of claim 3 wherein the basic solution is an aqueous aluminate solution.
- 7. The method of claim 6 wherein the aluminate of the solution is selected from the group consisting of sodium aluminate and potassium aluminate.
- 8. The method of claim 5 wherein the basic solution is an aqueous sodium or potassium aluminate solution.
- 9. The method of claim 3 wherein the pH of step (i) is from 2.5 to 5.5.
- 10. The method of claim 3 wherein the pH of step (ii) is from 3 to 6.
- 11. The method of claim 8 wherein the pH of step (i) is from 2.5 to 5.5 and the pH of step (ii) is from about 3 to 6.
- 12. The method of claim 3 wherein the drying of step (iii) is conducted at a temperature from about 100 to to 140.degree. C.
- 13. The method of claim 11 wherein the drying of step (iii) is conducted at a temperature from about 100 to to 140.degree. C.
- 14. A catalyst composition of a monodispersed mesoporous aluminosilicate catalyst matrix material comprised of: (i) about 5 to 40% by weight alumina with the balance being silica, which matrix material is characterized (a) as having a pore size distribution from about 200 to about 500 and (b) the substantial absence of an .sup.27 Al MASNMR peak after steaming at 1400.degree. F. for 16 hours, and (c) no more than 40% of the surface area is lost after steaming at 1400.degree. F. for 16 hours, and (ii) a crystalline aluminosilicate.
- 15. The catalyst composition of claim 14 wherein the matrix material has a pore size distribution is from about 100 to 400 Angstroms.
- 16. The catalyst composition of claim 15 wherein the crystalline aluminosilicate is a zeolite.
- 17. The catalyst composition of claim 16 wherein the zeolite is a faujasite selected from zeolite X, zeolite Y, and ultrastable zeolite Y.
- 18. A method for preparing a catalyst composition which method comprises: (i) blending an effective amount of an acidic aluminum salt solution at a pH of about 2.5 to 6 a monodispersed silica sol having an average particle size from about 200 to 500 Angstroms and a zeolite; (ii) adding to and further blending with the blend of (a) above, an effective amount of a basic solution to raise the pH of the resulting blend to about 3 to 9; and (iii) drying the blend at a temperature from about 80.degree. C. to about 220.degree. C.
- 19. The method of claim 18 wherein the acidic aluminum salt is selected from the group consisting of aluminum sulfate, aluminum nitrate, and aluminum chloride.
- 20. The method of claim 19 wherein the acidic aluminum salt is aluminum sulfate.
- 21. The method of claim 18 wherein the basic solution is an aqueous aluminate solution.
- 22. The method of claim 21 wherein the aluminate of the solution is selected from the group consisting of sodium aluminate and potassium aluminate.
- 23. The method of claim 20 wherein the basic solution is an aqueous sodium or potassium aluminate solution.
- 24. The method of claim 18 wherein the pH of step (i) is from 2.5 to 5.5.
- 25. The method of claim 18 wherein the pH of step (ii) is from 3 to 6.
- 26. The method of claim 23 wherein the pH of step (i) is from 2.5 to 5.5 and the pH of step (ii) is from about 3 to 6.
- 27. The method of claim 18 wherein the drying of step (iii) is conducted at a temperature from about 100.degree. C. to to 140.degree. C.
- 28. The method of claim 26 wherein the drying of step (iii) is conducted at a temperature from about 100.degree. C. to to 140.degree. C.
- 29. The method of claim 18 wherein the crystalline aluminosilicate is a faujasite selected from zeolite X, zeolite Y, and ultrastable zeolite Y.
- 30. The method of claim 22 wherein the acid aluminum salt is selected from the group consisting of aluminum sulfate, aluminum nitrate, and aluminum chloride; and the crystalline aluminosilicate is a faujasite selected from zeolite X, zeolite Y, and ultrastable zeolite Y.
- 31. The method of claim 30 wherein the crystalline aluminosilicate is a faujasite selected from zeolite X, zeolite Y, and ultrastable zeolite Y.
CROSS REFERENCE TO RELATED APPLICATIONS
Continuation-in-part of Application Ser. No. 215,163 filed July 5, 1988, now abandoned.
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Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
215163 |
Jul 1988 |
|