Method for making EUO framework type molecular sieves

Patent metadata

Field	Value
Publication number	US-9617163-B2
Application number	US-201414512008-A
Country	US
Kind code	B2
Filing date	Oct 10, 2014
Priority date	Oct 10, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A method for preparing EUO framework type molecular sieve is disclosed using an N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication as a structure directing agent. The EUO framework type molecular sieve, in its as-synthesized form, contains in its intracrystalline pores the N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication.

First claim

The invention claimed is:

1. A method for preparing an EUO framework type molecular sieve, comprising:
(a) preparing a reaction mixture containing:
(1) at least one source of an oxide of at least one tetravalent element;
(2) one or more sources of one or more oxides selected from the group consisting of oxides of trivalent elements, pentavalent elements, and mixtures thereof;
(3) at least one source of an element selected from Groups 1 and 2 of the Periodic Table;
(4) hydroxide ions;
(5) an N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication; and
(6) water; and

(b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the EUO framework type 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:

TO 2 /X 2 O b
10 to 100

M/TO 2
0.05 to 0.50

Q/TO 2
0.05 to 0.50

OH/TO 2
0.10 to 1.0

H 2 O/TO 2
5 to 100

wherein:
(1) T is selected from the group consisting of tetravalent elements from Groups 4-14 of the Periodic Table, and mixtures thereof;
(2) X is selected from the group consisting of trivalent and pentavalent elements from Groups 3-13 of the Periodic Table, and mixtures thereof;
(3) b equals the valence state of X;
(4) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table; and
(5) Q is an N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication.

3. The method of claim 2 , wherein T is selected from Si, Ge, and mixtures thereof.

4. The method of claim 2 , wherein X is selected from B, Al, Ga, In, Fe, and mixtures thereof.

5. The method of claim 2 , wherein T is Si and Xis Al.

6. The method of claim 2 , wherein the molecular sieve is prepared from a reaction comprising, in terms of mole ratios, the following:

TO 2 /X 2 O b
30 to 80

M/TO 2
0.05 to 0.30

Q/TO 2
0.10 to 0.30

OH/TO 2
0.20 to 0.80

H 2 O/TO 2
10 to 50.

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

TO 2 /X 2 O b
10 to 100

Q/TO 2
0.01 to 0.10

M/TO 2
0.01 to 0.15

wherein:
(1) T is selected from the group consisting of tetravalent elements from Groups 4-14 of the Periodic Table, and mixtures thereof;
(2) X is selected from the group consisting of trivalent and pentavalent elements from Groups 3-13 of the Periodic Table, and mixtures thereof;
(3) b equals the valence state of X;
(4) Q is an N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication; and
(5) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table.

8. The method of claim 7 , wherein T is selected from Si, Ge, and mixtures thereof.

9. The method of claim 7 , wherein X is selected from B, Al, Ga, In, Fe and mixtures thereof.

10. The method of claim 7 , wherein T is Si and Xis Al.

11. An EUO framework type molecular sieve having a composition, as-synthesized and in its anhydrous state, in terms of mole ratios, as follows:

TO 2 /X 2 O b
10 to 100

Q/TO 2
0.01 to 0.10

M/TO 2
0.01 to 0.15

wherein:
(1) T is selected from the group consisting of tetravalent elements from Groups 4-14 of the Periodic Table, and mixtures thereof;
(2) X is selected from the group consisting of trivalent and pentavalent elements from Groups 3-13 of the Periodic Table, and mixtures thereof;
(3) b equals the valence state of X;
(4) Q is an N,N′-dimethyl-1,4-diazabicyclo[2.2.2]octane dication; and
(5) M is selected from the group consisting of elements from Groups 1 and 2 of the Periodic Table.

12. The molecular sieve of claim 11 , wherein T is selected from Si, Ge, and mixtures thereof.

13. The molecular sieve of claim 11 , wherein X is selected from B, Al, Ga, In, Fe and mixtures thereof.

14. The molecular sieve of claim 11 , wherein T is Si and X is Al.

15. The molecular sieve of claim 11 , wherein the molecular sieve has a composition, as-synthesized and in its anhydrous state, in terms of mole ratios, as follows:

TO 2 /X 2 O b
30 to 80

Q/TO 2
0.01 to 0.10

M/TO 2
0.01 to 0.15.

Assignees

• Xie Dan
• Chevron Usa Inc

Inventors

• Xie Dan

Classifications

• C01B39/48 Primary

  using at least one organic template directing agent · CPC title