Morpholinium-based quaternary ammonium cation and AEI type zeolite made therewith
An aluminosilicate zeolite comprising at least 90% phase pure AEI zeolite crystals, the crystals having a plate-shaped morphology. In embodiments, at least 50% of the crystals have at least one ratio in at least one pair of dimensions in the range from 3:1 to 20:1, and thickness of 30-100 nm. A process of making the AEI zeolite comprising reacting an oxide of silicon, faujasite, a quaternary ammonium compound comprising 2,4,4,6-tetramethylmorpholinium cation, alkali metal hydroxide and water at at least 100 C to form crystals of a zeolite having an AEI framework. A crystalline AEI zeolite having pores comprising a 2,4,4,6-tetramethylmorpholinium, cation. The zeolite may comprise at least 90% phase pure AEI zeolite with the 2,4,4,6-tetramethylmorpholinium cation within pores of the zeolite. In some embodiments the zeolite comprises crystals having a plate-shaped morphology and with the 2,4,4,6-tetramethylmorpholinium cation within pores of the AEI zeolite.
1. An aluminosilicate zeolite comprising at least 90% phase pure AEI zeolite, wherein the AEI zeolite comprises crystals having a plate-shaped morphology, wherein at least 50% of the crystals have at least one ratio in at least one pair of dimensions in the range from 5:1 to 20:1, and wherein at least 50% of the crystals have a thickness in the range from 30 nm to 100 nm.
2. The aluminosilicate zeolite of claim 1 wherein at least 50% of the crystals have a ratio of length to height of 7.5:1 to 20:1.
3. The aluminosilicate zeolite of claim 1 wherein at least 75% of the crystals have a thickness in the range from 30 nm to 100 nm.
4. The aluminosilicate zeolite of claim 1 wherein at least 50% of the crystals range from about 0.3-2.0 micron in length, from about 0.3-2.0 micron in width, and from about 30 nm to about 100 nm in thickness.
5. The aluminosilicate zeolite of claim 2 wherein at least 75% of the crystals have a thickness in the range from 30 nm to 100 nm.
6. The aluminosilicate zeolite of claim 2 wherein at least 50% of the crystals range from about 0.3-2.0 micron in length, from about 0.3-2.0 micron in width, and from about 30 nm to about 100 nm in thickness.
7. A process of making an aluminosilicate zeolite having an AEI framework comprising reacting a mixture comprising an oxide of silicon, faujasite, a quaternary ammonium compound comprising a 2,4,4,6-tetramethylmorpholinium cation, an alkali metal hydroxide and water at a temperature of at least 100° C. for a time sufficient to form crystals of an aluminosilicate zeolite having an AEI framework.
8. The process of claim 7 wherein the quatemary ammonium compound further comprises an organic structure directing agent known for making SSZ-39.
9. The process of claim 7 wherein the quaternary ammonium compound further comprises a N,N-dimethyl-3,5-dimethylpiperidinium cation.
10. A crystalline AEI zeolite having pores comprising a 2,4,4,6-tetramethylmorpholinium cation, wherein the zeolite is an aluminosilicate.
11. The crystalline AEI zeolite of claim 10 wherein the pores further comprise a N, N-dimethyl-3,5-dimethylpiperidinium cation.
12. The crystalline AEI zeolite of claim 11 wherein the zeolite comprises at least 90% phase pure AEI zeolite.
13. The crystalline AEI zeolite of claim 11 , wherein the AEI zeolite comprises crystals have a plate-shaped morphology.
14. The crystalline AEI zeolite of- claim 11 wherein at least 50% of the crystals have at least one ratio in at least one pair of dimensions in the range from 3:1 to 20:1.
15. The crystalline AEI zeolite of claim 11 wherein at least 50% of the crystals range from about 30 nm to about 100 nm in thickness.
16. The crystalline AEI zeolite of claim 10 wherein the zeolite comprises at least 90% phase pure AEI zeolite.
17. The crystalline AEI zeolite of claim 10 , wherein the AEI zeolite comprises crystals have a plate-shaped morphology.
18. The crystalline AEI zeolite of claim 10 wherein at least 50% of the crystals have at least one ratio in at least one pair of dimensions in the range from 3:1 to 20:1.
19. The crystalline AEI zeolite of claim 10 wherein at least 50% of the crystals range from about 30 nm to about 100 nm in thickness.