Synthesis of molecular sieve SSZ-109
A method is provided for synthesizing a molecular sieve having the framework structure of SSZ-109 using N 1 ,N 6 -diisopropyl-N 1 ,N 1 ,N 6 ,N 6 -tetramethylhexane-1,6-diaminium cations as a structure directing agent.
1. A method of synthesizing a molecular sieve having the structure of SSZ-109, the method comprising:
(a) providing a reaction mixture comprising:
(1) a source of silicon oxide;
(2) a source of an oxide of a trivalent element (X);
(3) optionally, a source of a Group 1 or Group 2 metal (M);
(4) a structure directing agent (Q) comprising N 1 ,N 6 -diisopropyl-N 1 ,N 1 ,N 6 ,N 6 -tetramethylhexane-1,6-diaminium cations;
(5) a source of hydroxide ions; and
(6) water; and
(b) subjecting the reaction mixture to crystallization conditions 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 /X 2 O 3
≥10
M/SiO 2
0 to 0.50
Q/SiO 2
0.05 to 0.50
OH/SiO 2
0.01 to 0.60
H 2 O/SiO 2
5 to 60.
3. The method of claim 1 , wherein the reaction mixture has a composition, in terms of molar ratios, as follows:
SiO 2 /X 2 O 3
20 to 500
M/SiO 2
0.01 to 0.20
Q/SiO 2
0.10 to 0.25
OH/SiO 2
0.20 to 0.40
H 2 O/SiO 2
20 to 40.
4. The method of claim 1 , wherein the trivalent element X comprises one or more of boron and aluminum.
5. The method of claim 1 , wherein the crystallization conditions include a temperature of from 125° C. to 200° C.
6. A molecular sieve having the structure of SSZ-109 and, in its as-synthesized form, comprising N 1 ,N 6 -diisopropyl-N 1 ,N 1 ,N 6 ,N 6 -tetramethylhexane-1,6-diaminium cations in its pores.
7. The molecular sieve of claim 6 and having a molar ratio of SiO 2 /X 2 O 3 of at least 10, wherein X is a trivalent element.
8. The molecular sieve of claim 7 , wherein the molar ratio of SiO 2 /X 2 O 3 is in a range of from 20 to 500.
9. The molecular sieve of claim 7 , wherein the trivalent element X comprises one or more of boron and aluminum.
10. The molecular sieve of claim 5 , and having, in its as-synthesized form, an X-ray diffraction including the following peaks:
d-Spacing,
Relative
Peak
2-Theta (a)
nm
Intensity (b)
Broadening (c)
7.29
1.212
W
B
8.36
1.056
W
Sh
14.71
0.602
W
B
18.45
0.480
W
B
20.74
0.428
VS
Sh
21.82
0.407
W
Sh
22.53
0.394
VS
Sh
23.92
0.372
W
B
26.17
0.340
M
B
28.71
0.311
W
Sh.