CN101580246A - Porous zeotile sphere material and preparation method thereof - Google Patents
Porous zeotile sphere material and preparation method thereof Download PDFInfo
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- CN101580246A CN101580246A CNA2009100516616A CN200910051661A CN101580246A CN 101580246 A CN101580246 A CN 101580246A CN A2009100516616 A CNA2009100516616 A CN A2009100516616A CN 200910051661 A CN200910051661 A CN 200910051661A CN 101580246 A CN101580246 A CN 101580246A
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Abstract
The invention relates to a porous zeotile sphere material and a preparation method thereof, belonging to the inorganic material catalysis field. The zeotile particles of the porous zeotile sphere material of the invention is in sphere shape, the diameter is 0.1-50 microns, the ratio of Si/Al is 10-100, and the material is provided with an inorganic crystal framework with micropore and mesoporous structure, the micropore and mesoporous canal size is 0.4-50nm, and the mesoporous canal is communicated in three dimensions and is wormlike. In the invention, a polymethylmethacrylate (PMMA), a polystyrene sphere or a polyphenol formaldehyde powder are added into zeotile molecular sieve mother liquor, PMMA nano sphere form micron particles by regulating pH value by alkaline solution, the solution is put into a reaction kettle for hydrothermal reaction at 60-200 DEG C for 0.5-10 days and then is parched and roasted, thus obtaining three-dimension communicated porous zeotile sphere. The method reduces material synthesis cost with simple technique, and the prepared zeotile sphere material has high hydrothermal stability and three-dimension communicated porous canals.
Description
Technical field
The present invention relates to a kind of porous zeotile sphere material and preparation method, belong to inorganic material catalysis field.
Background technology
The micro-pore zeolite molecular sieve is a shape-selective catalyst important in the modern petroleum industry, has characteristics such as the microvoid structure of even prosperity, acid strong and good hydrothermal stability, is used widely in a lot of fields.But because its aperture is less, the major diameter molecule enters the duct difficulty, and diffusional resistance is bigger simultaneously, and the macromole that forms in its vestibule can not be overflowed fast, thereby has limited it greatly in the bulky molecular catalysis Application for Field.And the multistage pore canal zeolite molecular sieve has the advantage of micro-pore zeolite molecular sieve and mesoporous material simultaneously, can remedy the deficiency of micro porous molecular sieve, for macromolecular reaction provides favourable sterie configuration, have very high acidity, hydrothermal stability and meso-hole structure, can keep shape selectivity can in have good mass transfer ability, involve the interests of the state and the people and the essential domain of lifelines of the national economy plays an important role petroleum catalytic cracking, bulky molecular catalysis reaction and the worker that refines etc.
1992, (Nature 1992 for Kresge, 359,710-712) reported with liquid crystal templated technology and synthesized the aperture first at 1.5～10.0nm, and the novel molecular sieve M41S that the aperture is adjustable, tool duct six side's ordered arrangement have very big specific surface area and loading capacity, this report has caused the interest and the concern of material circle at once, has become the research focus of molecular sieve and catalytic field.But compare with micro porous molecular sieve, there are two fatal weakness in mesopore molecular sieve: the one, acidity a little less than; The 2nd, hydrothermal stability is relatively poor, and major cause is because the hole wall of mesopore molecular sieve is in metamict.This has greatly influenced the application of these mesopore molecular sieves in refining of petroleum industry.Therefore, be acidity and the hydrothermal stability that improves mesopore molecular sieve, people have developed the compound and package technique of original position, make the amorphous hole wall crystallization or the partial crystallization of mesoporous material, to form new composite structure molecular sieve, fundamentally improve the performance of molecular sieve.
As the ripe and the most the most frequently used method of synthetic multistage pore canal zeolite molecular sieve, many seminars have reported that the raw material of wood-charcoal material that utilizes multiple pattern synthesizes the example of multistage pore canal zeolite molecular sieve for template.Carbon nano-materials such as charcoal particle, carbon nanotube have been used to the synthetic of multistage pore canal zeolite molecular sieve, but this method at first needs to prepare the charcoal template, complex process, and cost is higher.Another kind of common method is by dissolving the silicon in zeolite structured, and perhaps aluminium forms the duct, but this method is not ideal enough to the controllability that aperture size and hole are communicated with.
Summary of the invention
First purpose of the present invention provides a kind of porous zeotile sphere material, it is characterized in that,
Zeolite granular is spherical, and diameter is at 0.1～50 micron, and Si/Al is 10～100, has the inorganic crystal skeleton of micropore and meso-hole structure, micropore and mesopore orbit size 0.4～50nm, and the mesopore orbit three-dimensional communication is vermiform.
Preferred specific surface area is 100～1800m
2/ g, total pore volume is 0.05～1.5cm
3/ g.
Second purpose of the present invention provides a kind of preparation method of porous zeotile sphere material, comprises following preparation process:
(1) polymethylmethacrylate (PMMA), polystyrene spheres or polyphenyl phenol formaldehyde powder are joined in the zeolite molecular sieve mother liquor,
Described zeolite molecular sieve mother liquor is selected traditional method preparation, Journal of Materials Che mistry, 2008,18 for use, 468), promptly select the preparation aluminum isopropylate for use, water, ethanol, tetraethoxy and TPAOH, mixing makes the zeolite mother liquor after stirring.
(2) regulate pH value by alkaline solution, the PMMA nanometer ball is assembled into the micron order ball, and the ratio of silicon source and organic ball is 10: 1～10 in the zeolite mother liquor
5: 1;
The silicon source is a tetraethoxy, and the mol ratio of silicon source and organic ball is 100: 1～10
4: 1;
(3) solution is packed in reactor 60-200 ℃ of hydro-thermal 0.5～10 day, the PMMA vitrifying becomes three-dimensional communication vermiform organism.
(4) take out filtration washing, oven dry and 500～600 ℃ of roastings were removed the PMMA organic formwork in 8～18 hours, obtained the three-dimensional communication porous zeotile sphere.
This method also is applicable to the synthetic multistage hole MTW of three-dimensional communication, BEA, LTA, FAU, the Si-Al zeolite molecular sieve of MFI structure except that synthetic three-dimensional communication hierarchical pore MFI structural zeolite molecular sieve.
Present method has reduced the synthetic cost of material, and technology is simple, and the zeolite ball material of preparation has very high hydrothermal stability and three-dimensional communication multistage pore canal.
Description of drawings
Fig. 1 technical process with three-dimensional communication porous zeotile sphere material of high hydrothermal stability provided by the invention.
Fig. 2 three-dimensional communication porous zeotile sphere material stereoscan photograph with high hydrothermal stability provided by the invention.Figure (A) is a zeolite ball scanned photograph, and figure (B) is not for adding PMMA zeolite sample pattern.
Fig. 3 transmission electron microscope photo with three-dimensional communication porous zeotile sphere material of high hydrothermal stability provided by the invention.Fig. 3 A is the multistage hole of embodiment 1 a three-dimensional communication ball, and Fig. 3 B is zeolite structured TEM photo.
Fig. 4 three-dimensional communication porous zeotile sphere material wide-angle XRD scattering with high hydrothermal stability provided by the invention.(a) being embodiment 2, (b) is embodiment 3, (c) is embodiment 1, (d) is embodiment 4.
Fig. 5 nitrogen adsorption curve (Fig. 5 A) and pore size distribution curve (Fig. 5 B) with three-dimensional communication porous zeotile sphere material of high hydrothermal stability provided by the invention.(a) being embodiment 2, (b) is embodiment 3, (c) is embodiment 1, (d) is embodiment 4.
Hydrothermal treatment consists nitrogen adsorption curve after 120 hours in the boiling water of Fig. 6 three-dimensional communication porous zeotile sphere material provided by the invention.(a) being embodiment 2, (b) is embodiment 1, (c) is Comparative Examples 1.
Embodiment
Embodiment 1:
Synthesizing of three-dimensional communication hierarchical pore MFI structural zeolite ball: with isopropyl alcohol aluminium, water, ethanol, TPAOH after the PMMA powder mixing and stirring, is added dropwise to tetraethoxy, stir and obtained the zeolite mother liquor in 1 hour, dropping sodium solution in mother liquor is regulated pH=10 again, stirs 2 hours.The mol ratio of reactant is
600SiO
2/10Al
2O
3/360TPAOH/16200H
2O/1620EtOH/10NaOH/5PMMA。With pack in the stainless steel cauldron 180 ℃ of hydro-thermals of above-mentioned solution, crystallization 2 days, washing and filtering ten is dry, and 600 ℃ of roastings 10 hours obtain three-dimensional communication hierarchical pore MFI structural zeolite ball.Typical X RD spectrum, SEM, TEM, nitrogen adsorption curve proof product are high hydrothermal stability, three-dimensional communication hierarchical pore MFI structural zeolite ball, its micropore size is 0.58nm, and mesoporous aperture is 13.1nm, and specific surface area is 444m
2/ g, total pore volume is 0.685cm
3/ g, hydrothermal treatment consists still keeps mesopore orbit after one week.
Embodiment 2
It is constant to press embodiment 1 each component concentration, regulates pH=11, and hydro-thermal is 180 ℃ in the stainless steel cauldron of packing into, crystallization 0.5 day, and washing, filtering and drying, 600 ℃ of roastings 10 hours, specific surface reduces, and is 297m
2/ g, pore volume 0.606cm
3/ g reduces, and keeps mesopore orbit.
Embodiment 3
It is constant to press embodiment 1 each component concentration, regulates pH=6, and hydro-thermal is 180 ℃ in the stainless steel cauldron of packing into, crystallization 1 day, and washing, filtering and drying, 600 ℃ of roastings 10 hours, specific surface reduces, and is 355m
2/ g, pore volume is reduced to 0.668cm
3/ g.
Embodiment 4
It is constant to press embodiment 1 each component concentration, regulates pH=7, and hydro-thermal is 180 ℃ in the stainless steel cauldron of packing into, crystallization 4 days, and washing, filtering and drying, 600 ℃ of roastings 10 hours, specific surface reduces, and is 325m
2/ g, pore volume is reduced to 0.576cm
3/ g.
Comparative Examples 1
It is constant to press embodiment 1 each component concentration, but does not add PMMA organic formwork ball, and hydro-thermal is 180 ℃ in the stainless steel cauldron of packing into, crystallization 2 days, washing, filtering and drying, 600 ℃ of roastings 10 hours, obtaining the MFI zeolite of crystallization, is not spherical morphology (seeing Fig. 2 B), and specific surface is reduced to 249m
2/ g, pore volume is reduced to 0.42cm
3/ g.
Claims (5)
1, porous zeotile sphere material is characterized in that, diameter is at 0.1～50 micron, and Si/Al is 10～100, has the inorganic crystal skeleton of micropore and meso-hole structure, micropore and mesopore orbit size 0.4～50nm, and the mesopore orbit three-dimensional communication is vermiform.
2, by the described porous zeotile sphere material of claim 1, it is characterized in that specific surface area is 100～1800m
2/ g, total pore volume is 0.05～1.5cm
3/ g.
3, the preparation method of porous zeotile sphere material comprises following preparation process:
(1) just polymethylmethacrylate (PMMA), polystyrene spheres or polyphenyl phenol formaldehyde powder join in the zeolite molecular sieve mother liquor;
(2) regulate PH=5～13 by alkaline solution, the ratio of silicon source and organic ball is 10: 1～10 in the zeolite mother liquor
5: 1;
(3) solution is packed in reactor 60-200 ℃ of hydro-thermal 0.5～10 day;
(4) take out filtration washing, oven dry and 500～600 ℃ of roastings 8～18 hours.
4, by the preparation method of the described porous zeotile sphere material of claim 2, it is characterized in that the silicon source is a tetraethoxy.
5, by the preparation method of the described porous zeotile sphere material of claim 2, the mol ratio that it is characterized in that silicon source and organic ball is 100: 1～10
4: 1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795635A (en) * | 2012-09-10 | 2012-11-28 | 中国科学院上海硅酸盐研究所 | Multi-orifice zeolite material as well as preparation method and application thereof |
| CN103265050A (en) * | 2013-05-28 | 2013-08-28 | 华东理工大学 | Method for preparing multi-stage pore zeolite molecular sieve microsphere |
| CN106687410A (en) * | 2014-07-11 | 2017-05-17 | 道达尔研究技术弗吕公司 | A method for preparing mesoporous microporous crystalline materials involving a recoverable and recyclable mesopore-templating agent |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7449165B2 (en) * | 2004-02-03 | 2008-11-11 | Ut-Battelle, Llc | Robust carbon monolith having hierarchical porosity |
| CN101164883B (en) * | 2007-09-27 | 2011-05-18 | 江西师范大学 | Preparation method for nano T-type molecular sieve |
| CN101423225A (en) * | 2008-11-27 | 2009-05-06 | 中国科学院过程工程研究所 | Method for preparing silica zeolite Silicalite-2 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795635A (en) * | 2012-09-10 | 2012-11-28 | 中国科学院上海硅酸盐研究所 | Multi-orifice zeolite material as well as preparation method and application thereof |
| CN103265050A (en) * | 2013-05-28 | 2013-08-28 | 华东理工大学 | Method for preparing multi-stage pore zeolite molecular sieve microsphere |
| CN106687410A (en) * | 2014-07-11 | 2017-05-17 | 道达尔研究技术弗吕公司 | A method for preparing mesoporous microporous crystalline materials involving a recoverable and recyclable mesopore-templating agent |
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