Method for preparing zeolite SSZ-98

Patent metadata

Field	Value
Publication number	US-9815704-B2
Application number	US-201615254011-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Sep 11, 2015
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A method is disclosed for preparing zeolite SSZ-98 using 1,3-dicyclohexylimidazolium cations as a structure directing agent.

First claim

The invention claimed is:

1. A method of preparing zeolite SSZ-98, comprising:
(a) preparing a reaction mixture containing:
(1) at least one source of silicon oxide;
(2) at least one source of aluminum oxide;
(3) at least one source of a metal (M) selected from Groups 1 and 2 of the Periodic Table;
(4) 1,3-dicyclohexylimidazolium cations (Q);
(5) hydroxide ions; and
(6) water; and

(b) subjecting the reaction mixture to crystallization condition sufficient to form crystals of the zeolite.

2. The method of claim 1 , wherein the zeolite is prepared from a reaction mixture comprising, in terms of mole ratios, the following:

SiO 2 /Al 2 O 3
10 to 100

M/SiO 2
0.05 to 0.45

Q/SiO 2
0.10 to 0.80

OH/SiO 2
0.20 to 1.00

H 2 O/SiO 2
10 to 80.

3. The method of claim 1 , wherein the zeolite is prepared from a reaction comprising, in terms of mole ratios, the following:

SiO 2 /Al 2 O 3
15 to 80

M/SiO 2
0.15 to 0.40

Q/SiO 2
0.15 to 0.40

OH/SiO 2
0.20 to 0.60

H 2 O/SiO 2
15 to 50.

4. The method of claim 1 , wherein the zeolite has a composition, as-synthesized and in the anhydrous state, in terms of mole ratios, as follows:

SiO 2 /Al 2 O 3
10 to 50

Q/SiO 2
0.02 to 0.20

M/SiO 2
0.01 to 0.20.

5. The method of claim 1 , wherein the zeolite has a composition, as-synthesized and in the anhydrous state, in terms of mole ratios, as follows:

SiO 2 /Al 2 O 3
12 to 35

Q/SiO 2
0.05 to 0.20

M/SiO 2
0.02 to 0.15.

6. The method of claim 1 , wherein the zeolite has, in its as-synthesized form, an X-ray diffraction pattern including the following lines:

2-Theta
d-spacing (nm)
Relative Intensity

 7.78 ± 0.20
1.136
VS

 9.74 ± 0.20
0.907
W

11.79 ± 0.20
0.750
W

13.46 ± 0.20
0.657
S

14.10 ± 0.20
0.627
W

15.53 ± 0.20
0.570
M

16.62 ± 0.20
0.533
W

19.51 ± 0.20
0.455
W

20.56 ± 0.20
0.432
VS

21.40 ± 0.20
0.415
M

23.38 ± 0.20
0.380
S

23.76 ± 0.20
0.374
VS

24.88 ± 0.20
0.358
W.

7. An SSZ-98 zeolite comprising 1,3-dicyclohexylimidazolium cations within in its pore structure.

8. The zeolite of claim 7 , wherein the zeolite has a SiO 2 /Al 2 O 3 mole ratio of from 10 to 50.

9. The zeolite of claim 7 , wherein the zeolite has a SiO 2 /Al 2 O 3 mole ratio of from 12 to 35.

10. The zeolite of claim 7 , having, in its as-synthesized form, an X-ray diffraction pattern including the following lines:

2-Theta
d-spacing (nm)
Relative Intensity

 7.78 ± 0.20
1.136
VS

 9.74 ± 0.20
0.907
W

11.79 ± 0.20
0.750
W

13.46 ± 0.20
0.657
S

14.10 ± 0.20

Assignees

• Chevron Usa Inc

Inventors

• Xie Dan

Classifications

• C01B39/305 Primary

  using at least one organic template directing agent · CPC title

• B01J37/0018

  Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat) · CPC title

• B01J29/50

  of the erionite or offretite type, e.g. zeolite T, as exemplified by patent document US2950952 · CPC title

• C01B39/48

  using at least one organic template directing agent · CPC title

• C01B39/026

  After-treatment · CPC title