SCM-33 molecular sieve, preparation method therefor and application thereof

Patent metadata

Field	Value
Publication number	US-12384688-B2
Application number	US-202017997960-A
Country	US
Kind code	B2
Filing date	Oct 28, 2020
Priority date	May 11, 2020
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A SCM-33 molecular sieve has a schematic chemical composition as shown in the formula “SiO 2 ·1/x XO 1.5 ·m MO 0.5 ”, wherein X is a framework trivalent element, the Si/X molar ratio x is ≥5, M is a framework equilibrium cation, and the M/Si molar ratio is 0<m≤1. The molecular sieve is a novel molecular sieve with RTE topology and the molecular sieve requires short preparation time, involves a low synthesis cost and can be used as adsorbent or catalyst.

First claim

The invention claimed is:

1. A SCM-33 molecular sieve, wherein the SCM-33 molecular sieve has a chemical composition of formula SiO 2 ·1/x XO 1.5 ·m MO 0.5 ,
wherein X is a framework trivalent element, the Si/X molar ratio x is ≥5, M is a framework equilibrium cation, and the M/Si molar ratio is 0<m≤1; and
the SCM-33 molecular sieve has an X-ray diffraction pattern shown in the following table:

2θ (°)
d-spacing (Å)
relative intensity, (I/I 0 ) × 100

 9.20 ± 0.3
9.61 ± 0.40
    s-vs

14.17 ± 0.3
6.24 ± 0.30
    s-vs

17.88 ± 0.3
4.96 ± 0.20
m-s

19.63 ± 0.3
4.52 ± 0.15
m-s

20.65 ± 0.1
4.30 ± 0.10
vs

21.72 ± 0.3
4.09 ± 0.10
 m-s.

2. The molecular sieve according to claim 1 , wherein the X-ray diffraction pattern of the SCM-33 molecular sieve has X-ray diffraction peaks shown in the following table:

2θ (°)
d-spacing (Å)
relative intensity, (I/I 0 ) × 100

 9.20 ± 0.3
9.61 ± 0.40
    s-vs

12.22 ± 0.3
7.24 ± 0.30
 w-m

 13.00 ± 0.05
6.80 ± 0.05
m-s

14.17 ± 0.3
6.24 ± 0.30
    s-vs

17.88 ± 0.3
4.96 ± 0.20
m-s

19.63 ± 0.3
4.52 ± 0.15
m-s

20.65 ± 0.1
4.30 ± 0.10
vs

21.72 ± 0.3
4.09 ± 0.10
 m-s.

3. The molecular sieve according to claim 2 , wherein the X-ray diffraction pattern of the SCM-33 molecular sieve further includes X-ray diffraction peaks shown in the following table:

2θ (°)
d-spacing (Å)
relative intensity, (I/I 0 ) × 100

15.77 ± 0.3
5.61 ± 0.25
vw

16.32 ± 0.3
5.43 ± 0.25
vw

18.39 ± 0.3
4.82 ± 0.20
w

23.60 ± 0.3
3.77 ± 0.10
vw-w  

24.57 ± 0.3
3.62 ± 0.05
  w-m

26.04 ± 0.3
3.42 ± 0.05
m-s 

27.54 ± 0.3
3.24 ± 0.05
m-s.

4. The molecular sieve according to claim 3 , wherein the X-ray diffraction pattern of the SCM-33 molecular sieve further includes X-ray diffraction peaks shown in the following table:

2θ (°)
d-spacing (Å)
relative intensity, (I/I 0 ) × 100

 12.90 ± 0.05
6.86 ± 0.05
w-m

20.44 ± 0.1
4.34 ± 0.10
 s-vs

25.24 ± 0.3
3.53 ± 0.05
w-m

28.49 ± 0.3
3.13 ± 0.05
w-m

29.22 ± 0.3
3.05 ± 0.05
m-s.

5. The molecular sieve according to claim 1 , wherein, in the formula, the molar ratio of Si/X is 10≤x≤200, and/or the molar ratio of M/Si is 0.01≤m≤0.85.

6. The molecular sieve according to claim 1 , wherein a form of an as-made state of the SCM-33 molecular sieve has a chemical composition of formula qQ·SiO 2 ·1/x XO 1.5 ·MO 0.5 ·z H 2 O, wherein the Si/X molar ratio x is ≥5, the M/Si molar ratio is 0<m≤1, the H 2 O/Si molar ratio z is 0.005≤z≤2, Q is an organic template, the Q/Si molar ratio q is 0.01≤q≤1.0.

7. The molecular sieve according to claim 1 , wherein the framework trivalent element X is selected from at least one of aluminum, boron, iron, gallium, indium and chromium; the framework equilibrium cation M is selected from at least one of proton, ammonium cation, sodium cation, potassium cation, lithium cation, rubidium cation, cesium cation, magnesium cation, calcium cation, strontium cation and barium cation.

8. The molecular sieve according to claim 6 , wherein the Q is an organic template selected from a substance containing isopropyl trimethylammonium cation having a structural formula of

9. The molecular sieve according to claim 1 , wherein no more than 10 wt. % of Si atoms in the SCM-33 molecular sieve are replaced by at least one non-silicon tetravalent framework element Y.

10. A method for preparing the molecular sieve according to claim 1 , comprising mixing a si

Assignees

• China Petroleum & Chem Corp
• Shanghai Res Inst Petrochemical Tech Sinopec

Inventors

• Yang Weimin
• Fu Wenhua
• Wang Zhendong
• Yuan Zhiqing
• Teng Jiawei
• Qiao Jian
• Tao Weichuan

Classifications

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/76

  by a space-group or by other symmetry indications · CPC title

• C01P2002/74

  by peak-intensities or a ratio thereof only · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01B39/065

  Galloaluminosilicates; Group IVB- metalloaluminosilicates; Ferroaluminosilicates · CPC title