MOLECULAR SIEVE SCM-41 METHOD OF ITS PRODUCTION AND ITS APPLICATION

Claims

1. A silicon germanium molecular sieve, wherein said molecular sieve has an X-ray diffraction pattern exhibiting X-ray diffraction peaks as shown in the table below:

2. The silicon germanium molecular sieve of claim 1, exhibiting X-ray diffraction peaks as shown in the table below:

3. The silicon-germanium molecular sieve of claim 1 or 2, wherein the X-ray diffraction pattern of the molecular sieve further exhibits one or more X-ray diffraction peaks as shown in the table below:

4. The silicon germanium molecular sieve of any one of claims 1 to 3, wherein the X-ray diffraction pattern of the molecular sieve further exhibits one or more X-ray diffraction peaks as shown in the table below:

5. The silicon germanium molecular sieve of any one of claims 1 to 4, wherein the X-ray diffraction pattern of the molecular sieve exhibits characteristics of the relative intensity of the diffraction peaks as shown in the table below:

6. The silicon germanium molecular sieve of claim 5, wherein the X-ray diffraction pattern further exhibits characteristics of the relative intensity of the diffraction peaks as shown in one or more rows of the table below:

7. The silicon germanium molecular sieve of claim 5 or 6, wherein the X-ray diffraction pattern further exhibits characteristics of the relative intensity of the diffraction peaks as shown in one or more rows of the table below:

8. A silicon-germanium molecular sieve according to any one of claims 1 to 7, wherein the molecular sieve satisfies at least one of the following conditions (a) to (h): (a) the molecular sieve has a framework topology containing natural cells [46], [44.62], [42.54], [42.54.62], [47.56.69.104]; (b) the molecular sieve has a framework topology with a minimum repeating unit consisting of 2[46], 2[44.62], 2[42.54], 1[42.54.62], 2[47.56.69.104] natural cells; (c) the molecular sieve has a framework topology containing natural cells [46], [44.62], [42.54], [42.64], [414.58.616.108]; (d) the molecular sieve has a framework topology with a minimum repeating unit consisting of 2[46], 2[44.62], 2[42.54], 1[42.64], 2[414.58.616.108] natural cells; (e) The molecular sieve has intersecting straight channels with 10-membered ring openings along the [010] and [110] crystal directions, preferably, straight channels with 10-membered annular openings have a flat projection in the form of an ellipse; more preferably, the ellipse has a major axis of 6.0-7.0 Å, preferably 6.1-6.9 Å, more preferably 6.2-6.8 Å; more preferably, the ellipse has a minor axis of 4.4-5.4 Å, preferably 4.5-5.3 Å, more preferably 4.6-5.2 Å; (f) the molecular sieve has monoclinic symmetry; preferably, the molecular sieve has unit cell parameters comprising a = 17.0-19.0 Å, preferably a = 17.2-18.8 Å, more preferably a = 17.4-18.6 Å; preferably, the molecular sieve has unit cell parameters comprising b = 12.6-14.6 Å, preferably b = 12.8-14.4 Å, more preferably b = 13.0-14.2 Å; preferably, the molecular sieve has unit cell parameters comprising c = 21.2-23.2 Å, preferably c = 21.4-23.0 Å, more preferably c = 21.6-22.8 Å; preferably, the molecular sieve has unit cell parameters including α=90°, γ=90°; preferably, the molecular sieve has a unit cell parameter of β=96-106°, preferably β=97-105°, more preferably β=98-104°; (g) The molecular sieve has a specific surface area of ​​250-1000 m 2 / g, preferably 300-800 m 2 / G; (h) The molecular sieve has a micropore volume of 0.1-0.4 cm 3 / g, preferably 0.12-0.35 cm 3 / G.

9. The silicon-germanium molecular sieve according to any one of claims 1 to 8, wherein the molecular sieve has a molar ratio of SiO2 / GeO2(0.25-25):1, preferably (0.5-20):1, more preferably (1-15):1, even more preferably (1.5-10):

1.

10. A silicon-germanium molecular sieve according to any one of claims 1 to 9, wherein the molecular sieve further comprises an additional element X selected from boron, aluminum, gallium, titanium, zirconium, hafnium, tin, zinc, iron, chromium, indium or a combination thereof, preferably selected from aluminum and titanium, preferably at least part of the additional element X is present in the form of an oxide; preferably, calculated on the basis of the molar content of the elements, the ratio of the total molar content of the element Si and the element Ge to the total molar content of all additional elements X in the molecular sieve is greater than or equal to 5, preferably greater than or equal to 10, more preferably 10-100.

11. The silicon-germanium molecular sieve of claim 1, having a schematic chemical composition represented by the formula "kF⋅mQ⋅SiO2⋅1 / nGeO2⋅pH2O" or "kF⋅mQ⋅SiO2⋅1 / nGeO2⋅qXOy / 2⋅pH2O", where Q is an organic template matrix, X is an element selected from boron, aluminum, gallium, titanium, zirconium, hafnium, tin, zinc, iron, chromium, indium or a combination thereof, preferably selected from aluminum and titanium, y is the valence of element X, and is in the range of 1-7, where, 0.25≤n≤25, preferably 0.5≤n≤20, more preferably 1≤n≤15, particularly preferably 1.5≤n≤10; 0.05≤k≤1.0, preferably 0.05≤k≤0.5, more preferably 0.1≤k≤0.5, particularly preferably 0.1≤k≤0.4; 0.01≤m≤1.0, preferably 0.02≤m≤0.5, more preferably 0.05≤m≤0.5, particularly preferably 0.05≤m≤0.3; 0.005≤p≤0.5, preferably 0.01≤p≤0.4, more preferably 0.01≤p≤0.3, particularly preferably 0.02≤p≤0.2; 0≤q≤(1+1 / n) / 5, preferably 0≤q≤(1+1 / n) / 10, more preferably (1+1 / n) / 100≤q≤(1+1 / n) / 10; the organic template matrix Q contains or consists of 1-[bis[3-(dimethylamino)propyl]amino]-2-propanol, Preferably, the X-ray diffraction pattern of the silicon germanium molecular sieve further exhibits one or more X-ray diffraction peaks as shown in the table below: more preferably, the X-ray diffraction pattern of the silicon germanium molecular sieve further exhibits one or more X-ray diffraction peaks as shown in the table below:

12. The silicon germanium molecular sieve of claim 11, wherein the X-ray diffraction pattern of the molecular sieve exhibits characteristics of the relative intensity of the diffraction peaks as shown in the table below: Preferably, the X-ray diffraction pattern of the molecular sieve further exhibits characteristics of the relative intensities of the diffraction peaks as shown in one or more rows of the table below: More preferably, the X-ray diffraction pattern of the molecular sieve further exhibits characteristics of the relative intensities of the diffraction peaks as shown in one or more rows of the table below:

13. A method for producing a silicon-germanium molecular sieve according to any one of claims 1 to 12, comprising the steps of mixing a silicon source, a germanium source, a fluorine source, an organic template matrix Q, water and, optionally, a source of an additional element X; carrying out a crystallization reaction; and, optionally, calcining, to obtain a silicon-germanium molecular sieve, wherein the organic template matrix Q comprises or consists of 1-[bis[3-(dimethylamino)propyl]amino]-2-propanol.

14. The production method according to paragraph 13, having one or more of the following features: the silicon source is selected from liquid glass, silicate sol, solid silica gel, colloidal silicon dioxide, amorphous silicon dioxide, diatomite, zeolite molecular sieve, tetraethyl orthosilicate, or a combination thereof; the germanium source is selected from germanium oxide, germanium nitrate, tetraalkoxygermanium, or a combination thereof; the fluorine source is selected from hydrofluoric acid, ammonium fluoride, sodium fluoride, potassium fluoride or a combination thereof, preferably selected from hydrofluoric acid and ammonium fluoride; and the source of additional element X is selected from a boron source, an aluminum source, a gallium source, a titanium source, a zirconium source, a hafnium source, a tin source, a zinc source, an iron source, a chromium source, an indium source, or a combination thereof; preferably selected from a boron oxide source, an aluminum oxide source, a gallium oxide source, a titanium oxide source, a zirconium oxide source, a hafnium oxide source, a tin oxide source, a zinc oxide source, an iron oxide source, a chromium oxide source, an indium oxide source, or a combination thereof.

15. The production method according to paragraph 13 or 14, characterized by one or more of the following features: the molar ratio of the amount of the organic template matrix Q, the silicon source (calculated as SiO2), the germanium source (calculated as GeO2), the fluorine source (calculated as F), and water is (0.15-4):(0.2-0.97):(0.03-0.8):(0.2-4):(0.5-30), preferably (0.15-4):(0.2-0.9615):(0.0385-0.8):(0.2-4):(0.5-30), more preferably (0.25-3.5):(0.3-0.96):(0.04-0.7):(0.35-3.5):(1-25), more preferably (0.3-2.5):(0.5-0.94):(0.06-0.5):(0.4-2.5):(2-20), even more preferably (0.35-1.5):(0.6-0.91):(0.09-0.4):(0.45-2):(3-15); the ratio of the total molar amount of the source of additional element X (calculated as element X) to the total molar amount of the silicon source (calculated as SiO2) and the germanium source (calculated as GeO2) is (0-0.2):1, preferably (0-0.1):1, more preferably (0.01-0.01):1; the crystallization reaction is carried out under conditions including: a crystallization temperature of 100-200°C, preferably 110-190°C, more preferably 120-180°C; a crystallization time of 24-360 hours, preferably 48-300 hours, more preferably 72-240 hours; The calcination is carried out under conditions including: calcination temperature of 300-750°C, preferably 400-600°C; calcination time of 1-10 hours, preferably 3-6 hours.

16. A molecular sieve composition comprising a silicon-germanium molecular sieve according to any one of claims 1 to 12 and an active component and / or a binder, preferably wherein the active component is selected from natural or synthetic zeolites and the binder is selected from clay, white clay, silica gel, aluminum oxide or a combination thereof.

17. The use of a silicon-germanium molecular sieve according to any one of claims 1 to 12 or a molecular sieve composition according to claim 16 as an absorbent or catalyst.