Disordered ABC-6 molecular sieve

Patent metadata

Field	Value
Publication number	US-10865117-B2
Application number	US-201716335325-A
Country	US
Kind code	B2
Filing date	Nov 2, 2017
Priority date	Nov 10, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60.5.

First claim

The invention claimed is:

1. A molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60,
wherein the molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence belongs to the disordered CHA-GME series; and
wherein the calcined form of the molecular sieve has a powder X-ray diffraction pattern collected in Bragg-Brentano geometry with a variable divergence slit using Cu K-alpha radiation essentially as shown in the following Table:

2-Theta (°)
d-spacing (Å)
Relative peak area
Peak character

7.45-7.54
11.85-11.72
W-M
Broad to sharp

9.55-9.65
9.24-9.15
VS-W
Sharp to broad

11.40-11.66
7.75-7.58
W-M
Broad to sharp

12.90-13.04
6.85-6.78
VS-M
Sharp

14.07-14.21
6.29-6.23
W
Sharp to broad

14.89-15.12
5.94-5.85
W
Broad to sharp

16.08-16.27
5.50-5.44
VS-W
Sharp to broad

17.17-17.34
5.16-5.11
W-S
Broad to sharp

17.71-18.00
5.00-4.92
VS-M
Sharp

where the relative areas of the observed peaks in the 2-Theta range 7-19 degrees are shown according to: W=weak: 0-20%; M=medium: 20-40%; S=strong: 40-60% and VS=very strong: 60-100%.

2. The molecular sieve of claim 1 having, in the as-synthesized and anhydrous state, a composition with the molar ratios given in the following table:

Component
Range

SiO2/Al2O3
 8-60

OSDA/SiO2
0.01-0.5

A/SiO2
0.01-0.5

where the OSDA is tetraethylammonium, methyltriethylammonium, propyltriethylammonium, diethyldipropylammonium, diethyldimethylammonium, choline and combinations thereof, preferably the OSDA is tetraehtylammonium, and A is an alkali or earth alkali cation.

3. The molecular sieve according to claim 1 , wherein the amount of stacking disorder is between 1 and 99%.

4. The molecular sieve according to claim 1 , wherein crystals of the molecular sieve have a bipyramidal, elongated bipyramidal or capped bipyramidal morphology.

5. The molecular sieve of claim 1 , wherein the silica-to-alumina mole ratio is between 8 and 40.

6. The molecular sieve of claim 1 , wherein the silica-to-alumina mole ratio is between 10 and 20.

7. The molecular sieve according to claim 1 , wherein at least a part of the aluminum and/or silicon is substituted by one or more metals selected from tin, zirconium, titanium, hafnium, germanium, boron, iron, indium and gallium.

8. The molecular sieve according to claim 1 , further comprising copper and/or iron.

9. A molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60, obtainable by a method comprising the steps of:
i) preparing a synthesis mixture comprising at least one crystalline molecular sieve containing six-ring structural features, a source of alkali or earth alkali (A), at least one OSDA and water in molar ratios of:

SiO2/Al2O3
 8-60

OSDA/SiO2
0.01-1.0

A/SiO2
0.01-1.0

OH/SiO2
0.01-1.5

H2O/SiO2
  2-200

ii) subjecting the mixture to conditions capable of crystallizing the molecular sieve; and
iii) separating the molecular sieve product;
wherein the molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence belongs to the disordered CHA-GME series; and
wherein the as-synthesized form of the molecular sieve has a powder X-ray diffraction pattern collected in Bragg-Brentano geometry with a variable divergence slit using Cu K-alpha radiation essentially as shown in the following table:

2-Theta (°)
d-spacing (Å)
Relative peak area
Peak character

7.45-7.54
11.85-11.72
W-M
Broad to sharp

9.55-9.65
9.24-9.15
VS-W
Sharp to broad

11.40-11.66
7.75-7.58
W-M
Broad to sharp

12.90-13.04

Assignees

• Haldor Topsoe As
• Umicore Ag & Co Kg

Inventors

• Vennestrøm Peter N R
• Lundegaard Lars Fahl
• Jensen Brian

Classifications

• B01D2255/50

  Zeolites · 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

• B01J2229/186

  not in framework positions · CPC title

• B01J37/30

  Ion-exchange · CPC title