Molecular sieve ssz-90, its synthesis and use

Patent metadata

Field	Value
Publication number	US-2017100711-A1
Application number	US-201514877457-A
Country	US
Kind code	A1
Filing date	Oct 7, 2015
Priority date	Oct 7, 2015
Publication date	Apr 13, 2017
Grant date	—

Abstract

A new crystalline zinc (silico)aluminophosphate molecular sieve designated SSZ-90 is disclosed. SSZ-90 is isostructural with the DFO framework type and is synthesized using an ionic liquid as both the solvent and the structure directing agent. The ionic liquid [Q + A − ] comprises a cation (Q + ) selected from the group consisting of 1,3-diisopropylimidazolium, 1,3-diisobutylimidazolium, and 1-isopropyl-3-isobutylimidazolium and an anion (A − ) which is not detrimental to the formation of the molecular sieve.

First claim

1 . A crystalline molecular sieve comprising [ZnO 4 ], [AlO 4 ] and [PO 4 ] corner-sharing tetrahedral units and having the DFO framework type.

2 . The molecular sieve of claim 1 , further comprising [SiO 4 ] corner-sharing tetrahedral units.

3 . The molecular sieve of claim 1 , having, in its as-synthesized form, an X-ray diffraction pattern substantially as shown in the following table:

2-Theta
d-Spacing, nm
Relative Intensity

 4.59 ± 0.20
1.922
W

 6.16 ± 0.20
1.434
M

 7.92 ± 0.20
1.115
VS

 8.24 ± 0.20
1.072
S

10.02 ± 0.20
0.882
M

11.44 ± 0.20
0.773
W

12.13 ± 0.20
0.729
W

14.69 ± 0.20
0.603
W

15.44 ± 0.20
0.573
W

15.90 ± 0.20
0.557
W

16.54 ± 0.20
0.536
W

17.22 ± 0.20
0.515
W

18.38 ± 0.20
0.482
W

20.58 ± 0.20
0.431
M

21.10 ± 0.20
0.421
S

4 . The molecular sieve of claim 1 , wherein the molecular sieve, in its as-synthesized form and on an anhydrous basis, is represented by the empirical formula:
m Q + :n F:(M x Al y P z )O 2 wherein:
(1) Q + represents a cation selected from the group consisting of 1,3-diisopropylimidazolium, 1,3-diisobutylimidazolium, and 1-isopropyl-3-isobutylimidazolium;
(2) m is the number of moles of Q + per mole of (M x Al y P z )O 2 , and 0<m≦1;
(3) n is the number of moles of fluoride ions per mole of (M x Al y P z )O 2 , and 0<n≦1;
(4) M is a metal selected from zinc or a combination of zinc and silicon;
(5) x is the mole fraction of M as tetrahedral oxides, and 0<x≦0.5;
(6) y is the mole fraction of Al as tetrahedral oxides, and y>0;
(7) z is the mole fraction of P as tetrahedral oxides, and z>0; and
(8) x+y+z=1.

5 . The molecular sieve of claim 4 , wherein M is zinc.

6 . The molecular sieve of claim 4 , wherein M is a combination of zinc and silicon.

7 . The molecular sieve of claim 4 , wherein m has a value of from 0.01 to 0.5.

8 . The molecular sieve of claim 4 , wherein n has a value of from 0.2 to 0.6.

9 . The molecular sieve of claim 4 , wherein x has a value of from 0.01 to 0.25, y has a value of from 0.3 to 0.7, and z has a value of from 0.25 to 0.7.

10 . A method for preparing a crystalline molecular sieve comprising [ZnO 4 ], [AlO 4 ] and [PO 4 ] corner-sharing tetrahedral units and having the DFO framework type, the method comprising:
(a) preparing a reaction mixture containing:
(1) at least one source of zinc;
(2) optionally, at least one source of silicon;
(3) at least one source of aluminum;
(4) at least one source of phosphorus;
(5) fluoride ions; and
(6) an ionic liquid [Q + A − ] comprising a cation (Q + ) selected from the group consisting of 1,3-diisopropylimidazolium, 1,3-diisobutylimidazolium, and 1-isopropyl-3-isobutylimidazolium; and an anion (A − ) which is not detrimental to the formation of the molecular sieve; and
(b) maintaining the reaction mixture under crystallization conditions sufficient to form crystals of the molecular sieve.

11 . The method of claim 10 , wherein the reaction mixture comprises, in terms of mole ratios, the following:

ZnO/Al 2 O 3
0.05 to 1.5 

SiO 2 /Al 2 O 3
  0 to 0.90

P 2 O 5 /Al 2 O 3
0.50 to 1.50

F/Al 2 O 3
0.25 to 0.75

[Q + A − /Al 2 O 3
 5 to 100

12 . The method of claim 10 , wherein the reaction mixture comprises, in terms of mole ratios, the following:

ZnO/Al 2 O 3
0.1 to 1.0

SiO 2 /Al 2 O 3
0.05 to 0.70

P 2 O 5 /Al 2 O 3
0.80 to 1.20

F/Al 2 O 3
0.25 to 0.75

[Q + A − /Al 2 O 3
 5 to 40

13 . The method of claim 10 , wherein the anion (A − ) is selected from the group consisting of halides, acetates, phosphates, phosphinates, aluminates, borates, sulfates, sulfonates, imides, amides, and cyanates.

14 . The method of claim 10 , wherein the crystallization conditions include a temperature of from 100° C. to 200° C.

15 . The method of claim 10 , wherein the molecular sieve has, in its as-synthesized form, an X-ray diffraction pattern substantially as shown in the following table:

Assignees

• Chevron Usa Inc

Inventors

• Benin Annabelle
• Zones Stacey Ian
• Chen Cong-Yan
• Xie Dan

Classifications

• B01J29/85 Primary

  Silicoaluminophosphates [SAPO compounds] · CPC title

• B01J29/84

  Aluminophosphates containing other elements, e.g. metals, boron · CPC title

• C07C2529/83

  Aluminophosphates (APO compounds) · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• C07C2529/74

  Noble metals · CPC title