CN1187266C - Synthesis of titania-silica molecular sieve - Google Patents
Synthesis of titania-silica molecular sieve Download PDFInfo
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- CN1187266C CN1187266C CN 03141681 CN03141681A CN1187266C CN 1187266 C CN1187266 C CN 1187266C CN 03141681 CN03141681 CN 03141681 CN 03141681 A CN03141681 A CN 03141681A CN 1187266 C CN1187266 C CN 1187266C
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- molecular sieve
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Abstract
The present invention relates to a titanium-silicon molecular sieve, particularly to a synthetic method for a TS-1 molecular sieve. The present invention belongs to the technical field of inorganic chemistry synthesis. The present invention utilizes solid silica gel, Ti (SO4) 2, an organic alkali temple agent and water as raw materials which are manufactured into the TS-1 molecular sieve by the steps of solid silica gel and Ti (SO4) 2 mixture preparation, reaction mixture preparation, water heating crystallization, conventional filtration, washing, drying and roasting, wherein the Ti (SO4) 2 in a solid silica gel and Ti (SO4) 2 mixture is dispersed on the surface of the solid silica gel in a single layer way. The method has the following advantages of no need of hydrolysis, few dosage of organic alkali temple agent, easy control of processes, good repeatability, high single kettle yield and low synthesis cost; furthermore, the solid silica gel with low price and the Ti (SO4) 2 are adopted as the raw materials. The method is suitable for synthetizing the TS-1 molecular sieve.
Description
Technical field
The present invention relates to a kind of HTS, promptly the synthetic method of TS-1 molecular sieve belongs to inorganic chemical synthesis technical field.
Background technology
The TS-1 molecular sieve is the hetero-atom molecular-sieve of the exploitation early 1980s.Because the TS-1 molecular sieve is introduced framework of molecular sieve to the transition metal titanium atom with the feature of appraising at the current rate, given when forming oxidation-reduction (Redox) katalysis and selected the shape function, thereby it has good directional catalyzing oxidation susceptibility, can be used as the Green Chemistry new catalyst of selective oxidation of new generation.They have shown better industrial application prospect in the oxidation of saturated alkane, the epoxidation of alkene, the oxidation of alcohols, the ammonia oxidation of pimelinketone and the fields such as hydroxylation of aromatic hydrocarbons at present.
The TS-1 molecular sieve belongs to the titanium derivative of Silicate zeolite, and synthetic method is a hydrothermal crystallization method.Can be divided into organic synthesis method and inorganic synthesis method according to raw-material difference, when promptly raw material silicon source and titanium source are inorganics, then be inorganic synthesis method, and all the other then are the organic synthesis method.
The TS-1 molecular sieve substantially all adopts the organic synthesis method synthetic at present, the organic titanium source, organosilicon source, organic bases and the water that are about to definite composition mix, or inorganic ti sources, organosilicon source, organic bases and the water of definite composition mixed, under certain temperature and pressure, carry out the hydrothermal crystallizing reaction, and obtain product through operations such as separation, washing, drying, roastings.Modified version synthetic method (Zeolites, 1992, Vol.12, p943～950) as people such as disclosed synthetic method and Thangaraj among GB207071A, the US 4,410,501 report.During the synthetic TS-1 molecular sieve of organic synthesis method since at least a in silicon source and the titanium source be organic raw material, thereby all have hydrolytic process, and hydrolytic process is wayward, so complicated operating process is repeated relatively poor; Organic bases template TPAOH (TPAOH) consumption is also big simultaneously, and therefore, cost was higher when the organic synthesis method was synthesized the TS-1 molecular sieve.
Disclose a kind of synthetic method of TS-1 molecular sieve among the CN1167082A, wherein contained inorganic synthesis method, promptly adopting the solid silicone bead is that silicon source, hydrolyzable inorganic titanium-containing compound are the titanium source, as TiOCl
2, TiCl
4, Ti (SO
4)
2Deng, process is: inorganic titanium-containing compound is dissolved in the organic bases template TPAOH solution, and mix with the solid silicone bead and to obtain reaction mixture, this reaction mixture is carried out the hydrothermal crystallizing certain hour in certain temperature in autoclave, filtration, washing, drying and the calcination process according to routine obtains the TS-1 molecular sieve then.When with Ti (SO
4)
2When synthesizing for the titanium source is with Ti (SO
4)
2At NH
3H
2α-the TiO that forms after the hydrolysis in the O system
2As the titanium source.Because hydrolysis takes place in inorganic titanium-containing compound when being dissolved in organic bases template TPAOH solution, and is easy to generate anatase octahedrite TiO in the hydrolytic process
2
Disclosing a kind of among the CN 1245089A is silicon source, TiF with inorganic silica gel or silicon sol
4Be the method for the synthetic TS-1 molecular sieve in titanium source, process is: by definite composition silicon source, TPAOH and water are mixed, to wherein adding TiF
4The aqueous solution mixes the back and carry out the hydrothermal crystallizing certain hour in certain temperature in autoclave, and filtration, washing, drying and the calcination process according to routine obtains the TS-1 molecular sieve then.Silicon source and titanium source were inorganic raw material when its characteristics were synthetic, did not need hydrolysis, and directly synthetic, the titanium source only is TiF simultaneously
4Under the strict day by day condition of environmental protection, F
-Ionic is introduced and is unsuitable for environmental requirement.
Summary of the invention
The synthetic method that the purpose of this invention is to provide a kind of TS-1 molecular sieve, this method has following advantage: adopt cheap solid silicone and Ti (SO
4)
2Be raw material, do not need hydrolysis, organic bases template consumption is few, and process is controlled easily, good reproducibility, and single-autoclave yield rate height, synthetic cost are low.
For achieving the above object, the present invention by the following technical solutions: it is characterized in that, with solid silicone, Ti (SO
4)
2, organic bases template and water is raw material, through solid silicone and Ti (SO
4)
2The preparation of mixture, the preparation of reaction mixture and three steps of hydrothermal crystallizing, through filtration, washing, drying, the roasting of routine, make the TS-1 molecular sieve again, solid silicone and Ti (SO
4)
2Ti (SO in the mixture
4)
2Be individual layer disperses on the solid silicone surface.
Now describe technical scheme of the present invention in detail.The synthetic method of above-described TS-1 molecular sieve is characterized in that, operation steps:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: (0.005～0.15), preparating mixture is earlier with Ti (SO
4)
2Be dissolved in certain water, stir and to add solid silicone down, form mixture, what of the water yield can be soaked fully with solid silicone and are as the criterion, then with mixture after 100～110 ℃ of dryings, in 150～600 ℃ of roastings 12～48 hours, form Ti (SO
4)
2Be individual layer dispersive mixture on the solid silicone surface;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: organic bases template: H
2O is 1: (0.05～0.5): (3～40), and the preparation reaction mixture mixes organic bases template and water earlier, under agitation adds the mixture of going up the step preparation, stirs, and forms reaction mixture;
The 3rd step hydrothermal crystallizing
The reaction mixture of last step preparation was transferred in the autoclave, in 130～200 ℃ of hydrothermal crystallizings 1～6 day, the good reaction mixture of crystallization after the filtration of routine, washing, drying, roasting product, the TS-1 molecular sieve.
Of the present invention being further characterized in that, operation steps:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: (0.01～0.1), the preparation reaction mixture was in 350～450 ℃ of roastings 24～36 hours;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: organic bases template: H
2O is 1: (0.1～0.2): (5～10), preparation reaction mixture;
The 3rd step hydrothermal crystallizing
In 160～180 ℃ of hydrothermal crystallizings 3～5 days.
Of the present invention being further characterized in that contains TPABr in the organic bases template.
Compared with prior art, the technology of the present invention has following remarkable advantage:
1, inorganic silicon source and the inorganic ti sources with cheapness is raw material, do not need hydrolysis, and building-up process is controlled easily;
2, organic bases template consumption is few, good reproducibility, and the single-autoclave yield rate height has reduced synthetic cost;
3, the building-up process pollutant emission is few, no F
-Pollute.
Therefore adopt the synthetic TS-1 molecular sieve of the present invention to have good reproducibility, characteristics that cost is low, this is beneficial to the industrial application of this molecular sieve very much.
Description of drawings
Fig. 1 is the XRD spectra before the embodiment 1 synthetic molecular sieve roasting.XRD determining is to carry out on German Bruker axs type X-ray diffractometer, adopts CuK
αFrom XRD spectra as can be known, the position of diffraction peak in 2 θ=7.8 °, 8.8 °, 23.2 °, 23.8 °, 24.3 ° etc. strong diffraction peak appears, illustrate that it has the MFI structure.
Fig. 2 is that embodiment 1 synthetic molecular sieve is through infrared spectra (IR) figure of 550 ℃ of roastings after 6 hours.The IR spectroscopic analysis is to carry out the KBr compressing tablet on the NEXUS of U.S. Nicolet company 670 type FT-IR spectrographs.From the IR spectrogram as can be known, at 960cm
-1Strong absorption peak appears in the place, illustrates that the Ti atom has entered framework of molecular sieve.
Embodiment
All embodiment all operate by the operation steps of technique scheme.
Embodiment 1
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: 0.04, preparating mixture was in 400 ℃ of roastings 24 hours;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: TPAOH: H
2O is 1: 0.2: 10, the preparation reaction mixture;
The 3rd step hydrothermal crystallizing
In 170 ℃ of hydrothermal crystallizings 4 days, the TS-1 molecular sieve.
The XRD spectra of TS-1 molecular sieve and IR spectrogram are seen Fig. 1 and 2 respectively.
Embodiment 2
Implementation process except for the following differences, all the other are all with embodiment 1:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
In 150 ℃ of roastings 48 hours.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 3
Implementation process except for the following differences, all the other are all with embodiment 1:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
In 600 ℃ of roastings 18 hours.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 4
Implementation process except for the following differences, all the other are all with embodiment 1:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: 0.005, preparating mixture was in 400 ℃ of roastings 24 hours.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 5
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: 0.15, preparating mixture was in 450 ℃ of roastings 30 hours;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: TPAOH: H
2O is 1: 0.5: 20, the preparation reaction mixture;
The 3rd step hydrothermal crystallizing
In 170 ℃ of hydrothermal crystallizings 4 days, the TS-1 molecular sieve.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 6
Implementation process except for the following differences, all the other are all with embodiment 1:
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: TPAOH: H
2O is 1: 0.05: 3, preparating mixture;
The 3rd step hydrothermal crystallizing
In 200 ℃ of hydrothermal crystallizings 3 days, the TS-1 molecular sieve.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 7
Implementation process except for the following differences, all the other are all with embodiment 1:
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: TPAOH: H
2O is 1: 0.2: 40, preparating mixture;
The 3rd step hydrothermal crystallizing
In 130 ℃ of hydrothermal crystallizings 6 days, the TS-1 molecular sieve.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 8
Implementation process except for the following differences, all the other are all with embodiment 1:
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: TPAOH: TPABr: H
2O is 1: 0.18: 0.04: 10, and the preparation reaction mixture.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Embodiment 9
Implementation process except for the following differences, all the other are all with embodiment 1:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
In 250 ℃ of roastings 24 hours.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Implementation process except for the following differences, all the other are all with embodiment 1:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
In 550 ℃ of roastings 24 hours.
XRD spectra and Fig. 1 of TS-1 molecular sieve are similar, and IR spectrogram and Fig. 2 are similar.
Claims (3)
1. the synthetic method of a TS-1 molecular sieve is characterized in that, with solid silicone, Ti (SO
4)
2, organic bases template and water is raw material, through solid silicone and Ti (SO
4)
2The preparation of mixture, the preparation of reaction mixture and three steps of hydrothermal crystallizing, through filtration, washing, drying, the roasting of routine, make the TS-1 molecular sieve again, solid silicone and Ti (SO
4)
2Ti (SO in the mixture
4)
2Be individual layer on the solid silicone surface and disperse operation steps:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: (0.005～0.15), preparating mixture is earlier with Ti (SO
4)
2Be dissolved in certain water, stir and to add solid silicone down, form mixture, what of the water yield can be soaked fully with solid silicone and are as the criterion, then with mixture after 100～110 ℃ of dryings, in 150～600 ℃ of roastings 12～48 hours, form Ti (SO
4)
2Be individual layer dispersive mixture on the solid silicone surface;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: organic bases template: H
2O is 1: (0.05～0.5): (3～40), and the preparation reaction mixture mixes organic bases template and water earlier, under agitation adds the mixture of going up the step preparation, stirs, and forms reaction mixture;
The 3rd step hydrothermal crystallizing
The reaction mixture of last step preparation was transferred in the autoclave, in 130～200 ℃ of hydrothermal crystallizings 1～6 day, the good reaction mixture of crystallization after the filtration of routine, washing, drying, roasting product, the TS-1 molecular sieve.
2. the synthetic method of TS-1 molecular sieve according to claim 1 is characterized in that, operation steps:
The first step solid silicone and Ti (SO
4)
2The preparation of mixture
SiO in the solid silicone in molar ratio
2: Ti (SO
4)
2In TiO
2Be 1: (0.01～0.1), the preparation reaction mixture was in 350～450 ℃ of roastings 24～36 hours;
The preparation of the second step reaction mixture
Go up the SiO in the mixture that goes on foot preparation in molar ratio
2+ TiO
2: organic bases template: H
2O is 1: (0.1～0.2): (5～10), preparation reaction mixture;
The 3rd step hydrothermal crystallizing
In 160～180 ℃ of hydrothermal crystallizings 3～5 days.
3. the synthetic method of TS-1 molecular sieve according to claim 1 and 2 is characterized in that, contains TPABr in the organic bases template.
Priority Applications (1)
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|---|---|---|---|
| CN 03141681 CN1187266C (en) | 2003-07-18 | 2003-07-18 | Synthesis of titania-silica molecular sieve |
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|---|---|---|---|
| CN 03141681 CN1187266C (en) | 2003-07-18 | 2003-07-18 | Synthesis of titania-silica molecular sieve |
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| CN1187266C true CN1187266C (en) | 2005-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962042A (en) * | 2012-11-28 | 2013-03-13 | 上海大学 | Preparation method of porous TiO2 nano optical catalysis material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101190792B (en) * | 2006-11-30 | 2013-03-06 | 中国石油化工股份有限公司 | Method for synthesizing titanium-silicon molecular screen |
| CN101205075B (en) * | 2006-12-22 | 2011-11-02 | 中国石油化工股份有限公司 | Method for synthesizing titanium-containing molecular sieve material |
| CN102502690A (en) | 2011-10-31 | 2012-06-20 | 大连理工大学 | Method for modifying TS (Titanium silicalite)-1 based on mixed liquor of quaternary ammonium salt and inorganic base |
| CN102583427B (en) * | 2012-03-12 | 2013-08-28 | 华东师范大学 | Preparation method of TS-1 |
| WO2018127414A1 (en) | 2017-01-09 | 2018-07-12 | Evonik Degussa Gmbh | Method for producing metal oxides by means of spray pyrolysis |
| EP3495321A1 (en) | 2017-12-07 | 2019-06-12 | Evonik Degussa GmbH | Preparation of powdery, porous crystalline metal silicates by means of flame spray pyrolysis |
| EP3628642A1 (en) | 2018-09-25 | 2020-04-01 | Evonik Operations GmbH | Process for the manufacture of pulverulent, porous crystalline metal silicates employing flame spray pyrolysis |
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2003
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962042A (en) * | 2012-11-28 | 2013-03-13 | 上海大学 | Preparation method of porous TiO2 nano optical catalysis material |
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