Synthesis of molecular sieve SSZ-98

Patent metadata

Field	Value
Publication number	US-9815705-B2
Application number	US-201715415983-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Apr 12, 2016
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A method is disclosed for synthesizing molecular sieve SSZ-98 using a structure directing agent selected from one or more of 1,1-diethylpyrrolidinium cations, 1-butyl-1-methylpiperidinium cations, 1,1-diethyl-4-methylpiperidinium cations, and 8-(pyridin-2-yl)-5,8-diazaspiro[4.5]decan-5-ium cations.

First claim

The invention claimed is:

1. A method of synthesizing molecular sieve SSZ-98, comprising:
(a) preparing a reaction mixture comprising:
(1) a source of silicon oxide;
(2) a source of aluminum oxide;
(3) a source of a Group 1 or 2 metal (M);
(4) a structure directing agent (Q) selected from one or more of 1,1-diethylpyrrolidinium cations, 1-butyl-1-methylpiperidinium cations, 1,1-diethyl-4-methylpiperidinium cations, and 8-(pyridin-2-yl)-5,8-diazaspiro[4.5]decan-5-ium cations;
(5) 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 comprises, in terms of molar ratios, the following:

SiO 2 /Al 2 O 3
 10 to 100

M/SiO 2
0.05 to 1.00

Q/SiO 2
0.05 to 0.70

OH/SiO 2
0.10 to 1.00

H 2 O/SiO 2
 10 to 60.

3. The method of claim 1 , wherein the reaction mixture comprises, in terms of molar ratios, the following:

SiO 2 /Al 2 O 3
15 to 80

M/SiO 2
0.15 to 0.45

Q/SiO 2
0.15 to 0.60

OH/SiO 2
0.40 to 0.80

H 2 O/SiO 2
 15 to 40.

4. The method of claim 1 , wherein the Group 1 or 2 metal comprises potassium.

5. The method of claim 1 , wherein the crystallization conditions include a temperature of from 125° C. to 200° C.

6. An SSZ-98 molecular sieve comprising within its pores a structure directing agent (Q) selected from one or more of 1,1-diethylpyrrolidinium cations, 1-butyl-1-methylpiperidinium cations, 1,1-diethyl-4-methylpiperidinium cations, and 8-(pyridin-2-yl)-5,8-diazaspiro[4.5]decan-5-ium cations.

7. The SSZ-98 molecular sieve of claim 6 , and having, in its as-synthesized and anhydrous form, a composition comprising the molar relationship:

SiO 2 /Al 2 O 3
10 to 50 

M/SiO 2
>0 to 0.2

Q/SiO 2
>0 to 0.2

where M is a Group 1 or 2 metal.

8. The SSZ-98 molecular sieve of claim 6 , and having, in its as-synthesized and anhydrous form, a composition comprising the molar relationship:

SiO 2 /Al 2 O 3
10 to 20 

M/SiO 2
>0 to 0.1

Q/SiO 2
>0 to 0.1

where M is a Group 1 or 2 metal.

Assignees

• Chevron Usa Inc

Inventors

• Xie Dan

Classifications

• C01B39/04

  using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound · CPC title

• C01B39/305 Primary

  using at least one organic template directing agent · CPC title

• C01B39/026

  After-treatment · CPC title

• B01J29/50

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