Synthesis of aluminosilicate molecular sieves having the IFR structure type

Patent metadata

Field	Value
Publication number	US-9452937-B2
Application number	US-201414586662-A
Country	US
Kind code	B2
Filing date	Dec 30, 2014
Priority date	Dec 30, 2014
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

This disclosure is directed to a method for directly preparing pure phase aluminosilicate molecular sieves having the IFR framework type using a colloidal aluminosilicate composition in the presence of N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cations as a structure directing agent.

First claim

The invention claimed is:

1. A method for preparing an aluminosilicate molecular sieve having the IFR framework type, comprising:
(a) preparing a reaction mixture containing:
(1) a colloidal aluminosilicate composition;
(2) at least one source of an element selected from Groups 1 and 2 of the Periodic Table;
(3) N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cations;
(4) hydroxide ions; and
(5) 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 molecular sieve is prepared from a reaction mixture comprising, in terms of mole ratios, the following:

SiO 2 /Al 2 O 3
5 to 200

M/SiO 2
0.01 to 0.50

Q/SiO 2
0.05 to 0.50

OH/SiO 2
0.05 to 0.50

H 2 O/SiO 2
15 to 100

wherein:
(1) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table; and
(2) Q is an N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cation.

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

SiO 2 /Al 2 O 3
15 to 100

M/SiO 2
0.05 to 0.25

Q/SiO 2
0.10 to 0.25

OH/SiO 2
0.10 to 0.30

H 2 O/SiO 2
20 to 50

wherein:
(1) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table; and
(2) Q is an N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cation.

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

SiO 2 /Al 2 O 3
5 to 200

Q/SiO 2
0.02 to 0.20

M/SiO 2
0.01 to 0.20

wherein:
(1) Q is an N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cation; and
(2) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table.

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

SiO 2 /Al 2 O 3
15 to 100

Q/SiO 2
0.05 to 0.15

M/SiO 2
0.05 to 0.20

wherein:
(1) Q is an N-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane cation; and
(2) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table.

6. The method of claim 1 , wherein the molecular sieve is substantially free of non-IFR framework type material.

Assignees

• Elomari Saleh Ali
• Singa Timi Pravin
• Chevron Usa Inc

Inventors

• Elomari Saleh Ali
• Singa Timi Pravin

Classifications

• C01B39/46

  Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)} · CPC title

• C01B39/48 Primary

  using at least one organic template directing agent · CPC title

• B01J29/70

  of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 · CPC title