Synthesis of molecular sieve SSZ-99
A molecular sieve having the structure of SSZ-99 is synthesized using 1,1-diethylpyrrolidinium cations as a structure directing agent.
1. A method of synthesizing a molecular sieve having the structure of SSZ-99, the method comprising:
(a) preparing a reaction mixture comprising:
(1) a source of silicon oxide;
(2) a source of aluminum oxide;
(3) a source of Group 1 or 2 metal (M);
(4) a structure directing agent (Q) comprising 1,1-diethylpyrrolidinium cations;
(5) hydroxide ions;
(6) water; and
(b) subjecting the reaction mixture to crystallization condition sufficient to form crystals of the molecular sieve.
2. The method of claim 1 , wherein the reaction mixture has a composition, in terms of molar ratios, as follows:
SiO 2 /Al 2 O 3
5 to 50
M/SiO 2
0.10 to 1.0
Q/SiO 2
0.05 to 0.50
OH/SiO 2
0.10 to 1.0
H 2 O/SiO 2
15 to 60.
3. The method of claim 1 , wherein the reaction mixture has a composition, in terms of mole ratios, as follows:
SiO 2 /Al 2 O 3
10 to 30
M/SiO 2
0.50 to 0.80
Q/SiO 2
0.10 to 0.30
OH/SiO 2
0.25 to 0.45
H 2 O/SiO 2
20 to 50.
4. The method of claim 1 , wherein the crystallization conditions include a temperature of from 125° C. to 200° C.
5. An molecular sieve having the structure of SSZ-99 and comprising 1,1-diethylpyrrolidinium cations in its pores.
6. The molecular sieve of claim 5 , having a composition, in its as-synthesized and anhydrous form, comprising the following molar relationship:
SiO 2 /Al 2 O 3
5 to 50
M/SiO 2
>0 to 0.2
Q/SiO 2
>0 to 0.2
wherein Q comprises 1,1-diethylpyrrolidinium cations and M is Group 1 or 2 metal.
7. The molecular sieve of claim 5 , having a composition, in its as-synthesized and anhydrous form, comprising the following molar relationship:
SiO 2 /Al 2 O 3
5 to 15
M/SiO 2
>0 to 0.1
Q/SiO 2
>0 to 0.1
wherein Q comprises 1,1-diethylpyrrolidinium cations and M is Group 1 or 2 metal.