Molecular sieve precursors and synthesis of molecular sieves
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-039/48
C01B-039/04
C01B-039/30
B82Y-030/00
출원번호
US-0592726
(2012-08-23)
등록번호
US-9174849
(2015-11-03)
발명자
/ 주소
Moini, Ahmad
Alerasool, Saeed
Prasad, Subramanian
출원인 / 주소
BASF Corporation
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
Molecular sieves, improved methods for their synthesis, and catalysts, systems and methods of using these molecular sieves as catalysts in a variety of processes such as abating pollutants in exhaust gases and conversion processes are described. The molecular sieves are made using a tailored colloid
Molecular sieves, improved methods for their synthesis, and catalysts, systems and methods of using these molecular sieves as catalysts in a variety of processes such as abating pollutants in exhaust gases and conversion processes are described. The molecular sieves are made using a tailored colloid including an alumina source, a silica source and a structure directing agent.
대표청구항▼
1. A zeolite precursor comprising a solution comprising colloidal particles, wherein: each particle comprises alumina, silica, and a first structure directing agent; andthe amounts of the alumina, silica, and the first structure directing agent are present in amount sufficient to form a zeolite havi
1. A zeolite precursor comprising a solution comprising colloidal particles, wherein: each particle comprises alumina, silica, and a first structure directing agent; andthe amounts of the alumina, silica, and the first structure directing agent are present in amount sufficient to form a zeolite having 8-ring pore openings and double-six ring secondary building units. 2. The zeolite precursor of claim 1, wherein a ratio of the structure directing agent to the silica is less than about 0.07. 3. The zeolite precursor of claim 1, wherein the first structure directing agent comprises an adamantyl-substituted compound. 4. The zeolite precursor of claim 1, wherein the first structure directing agent comprises an adamantylammonium compound. 5. The zeolite precursor of claim 4, wherein the first structure directing agent comprises trimethyl adamantylammonium cation. 6. The zeolite precursor of claim 1, wherein the colloidal solution is stable at room temperature for at least 30 days. 7. The zeolite precursor of claim 1, wherein the colloidal solution has a pH of less than 12. 8. The zeolite precursor of claim 7, wherein the colloidal solution has a pH of less than 11. 9. The zeolite precursor of claim 1, wherein the colloidal particles have a SiO2 to Al2O3 molar ratio from 10 to 1000. 10. The zeolite precursor of claim 1, wherein the colloidal particles have a SiO2 to Al2O3 molar ratio from 20 to 40. 11. The zeolite precursor of claim 1, wherein the solution contains an additional metal selected from iron, copper, cerium, cobalt, platinum and combinations thereof. 12. The zeolite precursor of claim 3 further comprising a second structure directing agent. 13. The zeolite precursor of claim 12, wherein the second structure directing agent comprises a benzyl-substituted compound. 14. The zeolite precursor of claim 1, wherein the zeolite has a structure type that is AEI, AFT, AFX, CHA, EAB, ERI, KFI, LEV, SAS, SAT, or SAV. 15. The zeolite precursor of claim 13, wherein the zeolite has the CHA structure type. 16. The zeolite precursor of claim 1, wherein the colloidal particles have an average particle size of less than about 100 nm. 17. The zeolite precursor of claim 16, wherein the colloidal particles have an average particle size from about 10 nm to about 50 nm. 18. The zeolite precursor of claim 1 having an aluminum-27 nuclear magnetic resonance (NMR) peak in the frequency shift range of 77-50 ppm with full width at half maximum of 100 to 2000 Hz. 19. A zeolite made from the precursor of claim 1. 20. The zeolite of claim 19, having primary crystals less than 100 nm in diameter. 21. The zeolite precursor of claim 1, wherein the alumina is derived from aluminum chlorohydrate, to form the colloid particle. 22. A method of making a zeolite having 8-ring pore openings and double-six ring secondary building units, the method comprising providing a solution of colloidal particles comprising alumina, silica, and a first structure directing agent, wherein the solution has a first pH; andperforming a crystallization process comprising adjusting the pH of the solution and hydrothermally treating the solution to form a zeolite. 23. The method of claim 22, wherein the solution is formed in a first reaction vessel, and the crystallization process is performed up to 6 months after forming the solution. 24. The method of claim 23, wherein the crystallization process is performed in a second reaction vessel. 25. The method of claim 22, wherein prior to the crystallization process, the solution has a pH of less than about 12, and hydrothermally treating the solution comprises heating the solution to a temperature exceeding 100° C. 26. The method of claim 25, wherein the solution has a pH of less than 11. 27. The method of claim 22, wherein the zeolite has a structure type that is AEI, AFT, AFX, CHA, EAB, ERI, KFI, LEV, SAS, SAT, or SAV. 28. The method of claim 27, wherein the zeolite has the CHA structure type. 29. The method of claim 22, wherein the structure directing agent and the silica are present in a ratio of less than about 0.07 structure directing agent to silica.
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이 특허에 인용된 특허 (9)
Bull, Ivor; Xue, Wen Mei; Burk, Patrick; Boorse, R. Samuel; Jaglowski, William M.; Koermer, Gerald S.; Moini, Ahmad; Patchett, Joseph A.; Dettling, Joseph C.; Caudle, Matthew T., Copper CHA zeolite catalysts.
Lok Brent M. (New City NY) Messina Celeste A. (Ossining NY) Patton Robert L. (Katonah NY) Gajek Richard T. (New Fairfield CT) Cannan Thomas R. (Valley Cottage NY) Flanigen Edith M. (White Plains NY), Crystalline silicoaluminophosphates.
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