CN101219795A - X type zeolite molecular sieve and method for producing the same - Google Patents
X type zeolite molecular sieve and method for producing the same Download PDFInfo
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- CN101219795A CN101219795A CNA2008100522523A CN200810052252A CN101219795A CN 101219795 A CN101219795 A CN 101219795A CN A2008100522523 A CNA2008100522523 A CN A2008100522523A CN 200810052252 A CN200810052252 A CN 200810052252A CN 101219795 A CN101219795 A CN 101219795A
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Abstract
The invention relates to an X-shaped zeolite molecular sieve and a method for preparing thereof, relating to a field of zeolite molecular sieve material; The X-shaped zeolite molecular sieve is a magnetic iron-doped X-shaped zeolite molecular sieve; magnetic ferroferric oxide is formed in the zeolite lattice, wherein, quality percentage of Fe occupying the molecular sieve is 1.89 percent to 3.48 percent. The preparing method comprises the steps that, iron-doped X-shaped zeolite molecular sieve is firstly compounded and then the magnetized magnetic iron-doped X-shaped zeolite molecular sieve is prepared through hydrogen reduction; the method results in a structure of Fe3O4 formed in frame of the iron-doped X-shaped zeolite molecular sieve. The magnetic iron-doped X-shaped zeolite molecular sieve has strong magnetism and magnetic stability, which not only solves the problem that the existing powdery zeolite molecular sieve is difficult to be recycled in reaction solution, and further improves absorption property of the sieve, but also enlarge application range of the zeolite molecular sieve, thereby allowing the zeolite molecular sieve to be applied to catalytic reaction in which iron acts as the catalyst.
Description
Technical field
Technical scheme of the present invention relates to the zeolite molecular sieve material field, particularly X type zeolite molecular sieve and preparation method thereof.
Background technology
The synthetic zeolite molecular sieve all is a powdery product at present.Though tiny zeolite molecular sieve crystal has good performance aspect selectivity, absorption, ion-exchange, thermostability and the catalytic applications, but the zeolite molecular sieve powdery product is difficult to separate with its handled solution, in industrial production, use extremely inconvenience, therefore it must be prepared into aggregate in actual applications with definite shape and size.At present the method for such aggregate preparation is to add 20%～60% binding agent in the zeolite molecular sieve powder, makes the particle with certain intensity and shape.The zeolite [molecular sieve that CN 85100759 zeolite [molecular sieves and preparation thereof are introduced is exactly the adding additives aftershaping.Yet the adding of binding agent has correspondingly reduced the various performances of zeolite powder molecular sieve, and this is the contradiction problem that exists during present zeolite molecular sieve is used.
In recent years, magnetic carrier method (hydrometallurgy, 2003,22 (2): 101) be widely used in biomass cells separation, wastewater treatment, coal desulfurization and mineral and process many technological processs.The essence of this method is that magnetic bodies is incorporated in weak magnetic or the non-magnetic particles increasing its susceptibility, and isolates these particulate matters by magnetic.The material that contains Fe, Co, Ni, Gr, Ba element at present has excellent magnetism and surfactivity, has a wide range of applications at the magnetic separation field.Given this, current preparation magnetic zeolite molecular sieve not only has important practical significance, and also has and has sufficient feasibility, the zeolite molecular sieve of the magnetic substance that promptly synthesizing mixes contains Fe, Co, Ni, Gr, Ba element.This class magnetic zeolite molecular sieve can keep the superperformance of powder shaped zeolite molecular sieve, can utilize magnetic separation technique that the powder shaped zeolite molecular sieve that reacts in the system of back is effectively separated again, thereby realizes the efficient recycling to zeolite molecular sieve.
The preparation method of a CN1256243 small-grain FeZSMS zeolite molecular sieve discloses at the Al that replaces as introducing Fe in the ZSM5 molecular sieve of catalyzer among original AlZSM5, to reach the purpose that effective pore radius, the increase controlling the solid acid degree, adjust zeolite are selected type, made its reactivity worth generation specific change, but with to make molecular sieve possess certain magnetic irrelevant, and this method needs the organic amine template, complex process, and the temperature of reaction height, the reaction times reaches 130 hours; CN1868876 discloses 4A type zeolite molecular sieve and preparation method thereof, and this method is a kind of magnetic substance load method, and it is that magnetic substance is carried on the zeolite molecular sieve surface; CN1868877 has disclosed 4A zeolite molecular sieve and preparation method thereof, and this method is a kind of magnetic core method, and it is to be magnetic nuclear with the magnetic substance, and zeolite molecular sieve is coated on its surface.The powder shaped zeolite molecular sieve product that these two kinds of methods make all has preferably magnetic and magnetic stability be easy to reclaim, but these two kinds of products are magnetic 4A type zeolite molecular sieve, magnetic ferroferric oxide does not enter in the lattice of zeolite, performance to zeolite itself is not improved, therefore its range of application is narrower, mainly is used in water treatment field.
Summary of the invention
Technical problem to be solved by this invention is: X type zeolite molecular sieve and preparation method thereof is provided, the X type zeolite molecular sieve that this method prepares is that Armco magnetic iron doping X type divides the stone molecular sieve, it has very strong magnetic and magnetic stability, both solved existing zeolite powder molecular sieve difficult problem that reclaims in reaction solution, and further improved its absorption property, zeolite molecular sieve is applied in the catalyzed reaction that with iron is catalyzer again and then enlarged the range of application of zeolite molecular sieve.
The present invention solves this technical problem the technical scheme that is adopted:
X type zeolite molecular sieve is a kind of Armco magnetic iron doping X type zeolite molecular sieve, forms magnetic ferroferric oxide in its zeolite lattice, and wherein to account for the mass percent of this molecular sieve integral body be 1.89%～3.48% to Fe.
The preparation method of above-mentioned X type zeolite molecular sieve, its preparation process is as follows:
The first step, iron doping X type zeolite molecular sieve synthetic
Get 0.5g～4g H
2C
2O
4, 0.5g～1.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and with this crystalline solid phase material of deionized water wash to neutral, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains;
In the implementation process of above step, the consumption of related material will be according to actual needs enlarges or dwindles according to above data are proportional;
Second step, the magnetization of iron doping X type zeolite molecular sieve
At pressure is 0.1Mpa; flow is under 60ml/ minute the environment of nitrogen protection; the iron doping X type zeolite molecular sieve that the first step obtains is put into tube furnace; be warmed up to 700 ℃; feeding pressure again is 0.1MPa; flow is 60ml/ minute a nitrogen 2 hours; to feed gas then, to be converted to pressure be 0.1MPa; flow is 40ml/ minute a hydrogen; logical this hydrogen is after 4 hours; conversion feeding pressure is 0.1MPa again; flow is 60ml/ minute a nitrogen 4 hours; cool to room temperature then; promptly make the Armco magnetic iron doping X type zeolite molecular sieve product that has magnetized; form magnetic ferroferric oxide in the zeolite lattice of this product, wherein to account for the mass percent of this molecular sieve integral body be 1.89%～3.48% to Fe.
The invention has the beneficial effects as follows:
1. the preparation method of X type zeolite molecular sieve of the present invention is earlier synthetic iron doping X type zeolite molecular sieve, prepares magnetized Armco magnetic iron doping X type zeolite molecular sieve by hydrogen reducing again, and this method causes forming Fe in iron doping X type zeolite molecular sieve skeleton
3O
4Structure.The Armco magnetic iron doping X type zeolite molecular sieve that makes so not only good crystalline, be evenly distributed, have very strong magnetic and magnetic stability simultaneously, and then the performance of zeolite itself there has been improvement, when keeping iron doping X distinctive adsorptivity of type zeolite molecular sieve and catalytic performance, also possessed ferromagnetism, therefore, the Armco magnetic iron doping X type zeolite molecular sieve that makes with the inventive method not only is applied in the general applied field of zeolite molecular sieve, also will be applied in the catalyzed reaction that with iron is catalyzer.
2. the prepared Armco magnetic iron doping of the preparation method X type zeolite molecular sieve of X type zeolite molecular sieve of the present invention is owing to possess certain magnetic, so product need not reshaping, just can use with Powdered, use the back can reclaim it easily with magnetic technique, thereby both solved the zeolite powder molecular sieve and in reaction solution, be difficult to the problem that reclaims, eradicated the disadvantage that adds the various performances of the corresponding reduction zeolite powder molecular sieve of affiliation of binding agent again, having overcome traditional zeolite molecular sieve fully needs moulding can not keep the contradictory problems of original performance again in application.
3. the preparation method of X type zeolite molecular sieve of the present invention adopts traditional hydrothermal method, and technology is simple, need not the organic amine template, and temperature of reaction is lower, the time is short and need not add tensio-active agent, and is pollution-free, helps producing in enormous quantities.
Above beneficial effect below the embodiment sample list of application and the explanation in fully proved.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
The X-ray diffraction spectrogram of the pure X type zeolite molecular sieve that Fig. 1 makes for embodiment 1, the iron doping X type zeolite molecular sieve that embodiment 2 makes and Armco magnetic iron doping X type zeolite molecular sieve.
The infrared spectrum of the pure X type zeolite molecular sieve that Fig. 2 makes for embodiment 1, the iron doping X type zeolite molecular sieve that embodiment 2 makes and Armco magnetic iron doping X type zeolite molecular sieve.
The sem photograph of the pure X type zeolite molecular sieve that Fig. 3 makes for embodiment 1.
The sem photograph of the iron doping X type zeolite molecular sieve that Fig. 4 makes for embodiment 2.
The sem photograph of the Armco magnetic iron doping zeolite molecular sieve that Fig. 5 makes for embodiment 2.
The magnetic hysteresis loop spectrogram of the Armco magnetic iron doping zeolite molecular sieve that Fig. 6 makes for embodiment 2 and embodiment 7.
Embodiment
Present embodiment is the comparative example, with the pure X type of hydro-thermal normal pressure synthesis zeolite molecular sieve.
Take by weighing 23g Na respectively
2SiO
39H
2O, 11.2g NaAlO
3, 15.5g NaOH and 10.8g KOH, being configured to mol ratio with the 92ml deionized water is 3.5Na
2O: K
2O: 0.7Al
2O
3: 0.9SiO
2: 62H
2The starting raw material of O, put into the there-necked flask of 500ml, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and with deionized water wash to neutral, at this crystalline solid phase material of 115 ℃ of oven dry of temperature, promptly obtain X type zeolite molecular sieve at last.
Curve I among Fig. 1 is the X-ray diffraction spectrogram of the pure X type of present embodiment synthetic zeolite molecular sieve, and it is consistent with the X-ray diffraction spectrogram of the pure X type of standard zeolite molecular sieve.Curve a among Fig. 2 is the infrared spectrum of the pure X type of present embodiment synthetic zeolite molecular sieve, and it is consistent with the infrared spectrum of the pure X type of existing bibliographical information zeolite molecular sieve.The analysis and characterization present embodiment synthetic material of Fig. 1 and Fig. 2 is pure X type zeolite molecular sieve.Fig. 3 is the sem photograph of the pure X type of present embodiment synthetic zeolite molecular sieve, and the pure X type of the visible present embodiment synthetic of this figure zeolite molecular sieve crystalline form is even.
Embodiment 2
The first step, iron doping X type zeolite molecular sieve synthetic
Get 2g H
2C
2O
4, 0.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.94%, its character sees Table 1.
Curve II-1 among Fig. 1 is the iron doping X type zeolite molecular sieve X-ray diffraction spectrogram that present embodiment makes, and the characteristic peak of this figure is consistent with the X-ray diffraction spectrogram of pure X type zeolite molecular sieve.This proof can be synthesized under the condition of complex compound of interpolation iron and obtains iron doping X type zeolite molecular sieve in synthetic X type zeolite molecular sieve process.Curve b among Fig. 2 is the infrared spectrum of this iron doping X type zeolite molecular sieve.The infrared spectrum of this figure and pure X type zeolite molecular sieve is contrasted as can be known, represent the characteristic peak of silicate to the direction that wave number reduces displacement to take place, wave number is 457cm simultaneously
-1, 560cm
-1, 663cm
-1Variation has also taken place in the power of characteristic peak, and this phenomenon has proved that iron mixes Already in the X type zeolite lattice.The iron doping X type zeolite molecular sieve sem photograph that Fig. 4 makes for present embodiment, this figure reflect that this iron doping X type zeolite molecular sieve crystalline form is complete, even.
Second step, the magnetization of iron doping X type zeolite molecular sieve
At pressure is 0.1Mpa; flow is under 60ml/ minute the environment of nitrogen protection; the iron doping X type zeolite molecular sieve that the first step obtains is put into tube furnace; be warmed up to 700 ℃; feeding pressure again is 0.1MPa; flow is 60ml/ minute a nitrogen two hours; to feed gas then, to be converted to pressure be 0.1MPa; flow is 40ml/ minute a hydrogen; logical this hydrogen is after four hours; conversion feeding pressure is 0.1MPa again; flow is 60ml/ minute a nitrogen 4 hours; cool to room temperature then; promptly make the Armco magnetic iron doping X type zeolite molecular sieve product that has magnetized; in the zeolite lattice of this product, form magnetic ferroferric oxide; recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.94%, and its character sees Table 1.
Curve II-2 among Fig. 1 is the Armco magnetic iron doping X type zeolite molecular sieve X-ray diffraction spectrogram that present embodiment makes, as can be seen from the figure, the position at its principal character peak does not change, and proves that iron doping X type zeolite molecular sieve still is X type zeolite molecules sieve structure behind hydrogen reducing.Curve c among Fig. 2 is the infrared spectrum of this Armco magnetic iron doping X type zeolite molecular sieve, and this figure has proved that iron doping X type zeolite molecular sieve still is iron doping X type zeolite molecules sieve structure behind hydrogen reducing.The sem photograph of the Armco magnetic iron doping zeolite molecular sieve that Fig. 5 makes for present embodiment, this figure reflects should Armco magnetic iron doping X type zeolite molecular sieve crystalline form is complete, even.Curve X among Fig. 6
2Be the magnetic hysteresis loop spectrogram of this Armco magnetic iron doping zeolite molecular sieve, the magnetic hysteresis loop of this product is roughly " S " type curve that overlaps, and demonstrates good superparamagnetism, and its saturation magnetization M is 0.5076emu/g.
Embodiment 3
The first step, iron doping X type zeolite molecular sieve synthetic
Get 0.5g H
2C
2O
4, 0.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.89%, its character sees Table 1.
Second step, the magnetization of iron doping X type zeolite molecular sieve
With embodiment 2.Recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.89%.
Embodiment 4
The first step, iron doping X type zeolite molecular sieve synthetic
Get 1g H
2C
2O
4, 0.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.90%, its character sees Table 1.
Second step, the magnetization of iron doping X type zeolite molecular sieve
With embodiment 2.Recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 1.90%.
The first step, iron doping X type zeolite molecular sieve synthetic
Get 4g H
2C
2O
4, 0.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 2.06%, its character sees Table 1.
Second step, the magnetization of iron doping X type zeolite molecular sieve
With embodiment 2.Recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 2.06%.
Embodiment 6
The first step, iron doping X type zeolite molecular sieve synthetic
Get 4g H
2C
2O
4, 0.8g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 2.98%, its character sees Table 1.
Second step, the magnetization of iron doping X type zeolite molecular sieve
With embodiment 2.Recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 2.98%.
Embodiment 7
The first step, iron doping X type zeolite molecular sieve synthetic
Get 4g H
2C
2O
4, 1.0g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, filtering separation obtains the crystalline solid phase material, and arrive neutral with this crystalline solid phase material of deionized water wash, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains, recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 3.48%, its character sees Table 1.
Second step, the magnetization of iron doping X type zeolite molecular sieve
With embodiment 2.Recording the mass percent that Fe wherein accounts for this molecular sieve integral body with chemical analysis is 3.48%.
Curve X7 among Fig. 6 is the magnetic hysteresis loop spectrogram of the Armco magnetic iron doping zeolite molecular sieve that makes of present embodiment.The magnetic hysteresis loop of this Armco magnetic iron doping zeolite molecular sieve is roughly " S " type curve that overlaps, and demonstrates good superparamagnetism, and its saturation magnetization M is 0.6608emu/g.
The pure X type of table 1. zeolite molecular sieve, iron doping X type zeolite molecular sieve and Armco magnetic iron doping X type zeolite molecular sieve
Ion-exchange absorption performance relatively
The measuring method of plumbous exchange capacity in the table 1: taking by weighing product that 0.01g the foregoing description makes respectively, to put into 40ml concentration be 5 * 10
-4Pb (the NO of mol/L
3)
2In the solution, normal temperature is 1 hour measured absorption property of reaction down.
Analytical table 1 data as can be known, the plumbous exchange capacity of iron doping X type zeolite molecular sieve is than pure X type zeolite molecular sieve height, and along with the wherein increase of Fe doping, absorption property is also increasing; The iron doping X type zeolite molecular sieve of comparing embodiment 2 and Armco magnetic iron doping X type zeolite molecular sieve as can be known, the Armco magnetic iron doping X type zeolite molecular sieve that obtains behind the hydrogen reducing, its plumbous exchange capacity has obtained further raising.In addition, comparing embodiment 2 Armco magnetic iron doping X type zeolite molecular sieves and embodiment 7 Armco magnetic iron doping X type zeolite molecular sieves as can be known, the saturation magnetization of Armco magnetic iron doping X type zeolite molecular sieve increases with the increase of Fe doping.
Claims (2)
1.X the type zeolite molecular sieve is characterized in that: it is a kind of Armco magnetic iron doping X type zeolite molecular sieve, forms magnetic ferroferric oxide in its zeolite lattice, and wherein to account for the mass percent of this molecular sieve integral body be 1.89%～3.48% to Fe.
2. the preparation method of the described X type of claim 1 zeolite molecular sieve is characterized in that its preparation process is as follows:
The first step, iron doping X type zeolite molecular sieve synthetic
Get 0.5g～4g H
2C
2O
4, 0.5g～1.5g Fe (NO
3)
3Be dissolved in the buffered soln that is configured to ironic oxalate in the 30ml deionized water, get 23g Na
2SiO
39H
2O is dissolved in and is configured to sodium silicate solution in the 50ml water, get the 11.2g sodium aluminate solution and in 40ml water, be configured to sodium aluminate solution , get 15.5g sodium hydroxide and 10.8g potassium hydroxide and be dissolved in the mixing solutions that is configured to two kinds of alkali in the 32ml water, solution slowly is added drop-wise among the solution , stir simultaneously, be added dropwise to solution and the mixed solution of solution again, stir simultaneously, even mixture after being mixed matter is put into a there-necked flask, stirred 3 hours in 70 ℃ of ageings of temperature, again 95 ℃ of crystallization of temperature 2 hours, separate after filtration and obtain the crystalline solid phase material, and with this crystalline solid phase material of deionized water wash to neutral, at last at this crystalline solid phase material of 115 ℃ of oven dry of temperature, the synthetic thus uniform iron doping of the crystalline form X type zeolite molecular sieve that obtains;
In the implementation process of above step, the consumption of related material will be according to actual needs enlarges or dwindles according to above data are proportional;
Second step, the magnetization of iron doping X type zeolite molecular sieve
At pressure is 0.1Mpa; flow is under 60ml/ minute the environment of nitrogen protection; the iron doping X type zeolite molecular sieve that the first step obtains is put into tube furnace; be warmed up to 700 ℃; feeding pressure again is 0.1MPa; flow is 60ml/ minute a nitrogen 2 hours; to feed gas then, to be converted to pressure be 0.1MPa; flow is 40ml/ minute a hydrogen; logical this hydrogen is after 4 hours; conversion feeding pressure is 0.1MPa again; flow is 60ml/ minute a nitrogen 4 hours; cool to room temperature then; promptly make the Armco magnetic iron doping X type zeolite molecular sieve product that has magnetized; form magnetic ferroferric oxide in the zeolite lattice of this product, wherein to account for the mass percent of this molecular sieve integral body be 1.89%～3.48% to Fe.
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| CN111453744A (en) * | 2020-04-03 | 2020-07-28 | 合肥工业大学 | Method for preparing magnetic zeolite by using iron-rich kaolin |
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2008
- 2008-02-02 CN CNB2008100522523A patent/CN100545090C/en not_active Expired - Fee Related
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| CN107285341A (en) * | 2017-07-19 | 2017-10-24 | 西安科技大学 | A kind of method that utilization gangue prepares magnetic p-type molecular sieve |
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| CN111170332A (en) * | 2020-01-02 | 2020-05-19 | 淮阴工学院 | Method for preparing magnetic ZSM-5 zeolite by using clay and red mud as raw materials as slightly soluble agent |
| CN111453744A (en) * | 2020-04-03 | 2020-07-28 | 合肥工业大学 | Method for preparing magnetic zeolite by using iron-rich kaolin |
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