KR101845609B1 - Nano-zeolite modified alkylenediamine, and preparation method thereof - Google Patents

Abstract

The present invention relates to alkylene diamine modified nano zeolites and their preparation. The nano-zeolite according to the present invention is modified with an alkylene diamine having 1 to 4 carbon atoms, and the average BET specific surface area and average pore volume of the zeolite are optimized in comparison with general zeolite, so that the zeolite has excellent adsorbability against pollutants such as carbon dioxide and heavy metals in the air But also can be separated and / or adsorbed with high selectivity, so that it can be usefully used in various fields requiring separation and / or removal of pollutants in the atmosphere and / or water.

Description

[0001] Nano-zeolite modified alkylenediamine, and preparation method thereof [

The present invention relates to alkylene diamine modified nano zeolites and their preparation.

In modern industrial society, demand for energy, water resources, land, and various resources increased sharply due to population growth, industrial development, and consumption increase. As a result, enormous amounts of pollutants such as soot, sewage, waste, toxic compounds, noise, vibration, and radioactive materials are emitted, and this spreads to a wide area, thereby causing environmental pollution. This phenomenon is further deepened by the economic development, destroying the natural ecology of the area, threatening the survival of the creature, and promoting depletion and deterioration of the natural resources, thereby threatening the human living environment.

On the other hand, adsorption refers to a phenomenon in which a specific substance sticks to the surface of a solid regardless of its state, and the solid in which a contaminant sticks is called an adsorbent. Generally, the adsorbent is excellent in adsorption efficiency because it has a large surface area per unit volume or per unit weight when the surface is rough or porous. Therefore, activated carbon, diatomaceous earth, zeolite, silica gel, starch, bentonite, alumina and the like have been widely used as adsorbents as materials having such a porous structure.

In recent years, researches have been actively conducted on adsorbing and separating and / or removing contaminants present in the atmosphere or water quality using an adsorbent, specifically, carbon dioxide present in the atmosphere or heavy metals present in water.

As an example thereof, Patent Document 1 discloses a carbon dioxide adsorbent containing chaebasite zeolite containing an alkali metal or an alkaline earth metal ion, and Patent Document 2 discloses a technique for removing heavy metals present in acidic wastewater by using zeolite .

However, the adsorbents developed so far have a low specific surface area, so that the efficiency and / or selectivity for adsorbing pollutants present in the air or water are low, or high energy is required when adsorbing contaminants, which limits the generation of additional contaminants.

Accordingly, the present invention provides a method of separating and / or removing contaminants without causing additional contaminants when adsorbed, as well as having high adsorptivity to contaminants, regardless of the condition in which contaminants exist, Development is urgently required.

Korea Patent Publication No. 2014-0111549 Korean Patent No. 10-1151772

Disclosure of the Invention An object of the present invention is to provide a method and apparatus for separating and / or removing contaminants such as carbon dioxide and heavy metals in the air without further pollutants being emitted during the separation and / or adsorption of pollutants such as carbon dioxide (CO ₂ ) Or adsorption, as well as a high selectivity for contaminants depending on processing conditions.

Another object of the present invention is to provide a method for producing the adsorbent material.

Accordingly, in one embodiment, the present invention provides a nano-zeolite modified with an alkylene diamine having 1 to 4 carbon atoms.

The present invention also provides, in one embodiment, 1 part by weight of nano-zeolite; And 10 to 50 parts by weight of an alkylenediamine having 1 to 4 carbon atoms, based on the total weight of the nano-zeolite modified with the alkylene diamine.

The nano-zeolite according to the present invention is modified with an alkylene diamine having 1 to 4 carbon atoms, and the average BET specific surface area and average pore volume of the pore are optimized in comparison with general zeolite, so that the adsorbent has excellent adsorption ability against pollutants such as carbon dioxide and heavy metals in the air As well as separating and / or adsorbing contaminants to high selectivity at low temperatures.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an image showing the bonding relationship between an alkylenediamine and a nano-zeolite.
FIG. 2 is a scanning electron microscope (SEM) image of nano-zeolite modified with (a) nano-zeolite and (b) alkylenediamine.
FIG. 3 is a graph showing an infrared spectroscopic (IR) analysis of nano-zeolite modified with an alkylenediamine.

The present invention relates to a nano zeolite usable for the separation and / or removal of contaminants present in the atmosphere and / or in water and to a process for the preparation thereof.

In modern industrial society, demand for energy, water resources, land, and various resources increased sharply due to population growth, industrial development, and consumption increase. As a result, enormous amounts of pollutants such as soot, sewage, waste, toxic compounds, noise, vibration, and radioactive materials are emitted, and this spreads to a wide area, thereby causing environmental pollution. This phenomenon is further deepened by the economic development, destroying the natural ecology of the area, threatening the survival of the creature, and promoting depletion and deterioration of the natural resources, thereby threatening the human living environment.

In recent years, researches have been actively conducted on adsorbing and separating and / or removing contaminants present in the atmosphere or water quality using an adsorbent, specifically, carbon dioxide present in the atmosphere or heavy metals present in water. However, the adsorbents developed to date have a low specific surface area and thus have a low efficiency of adsorbing contaminants present in the air or water, or require a high energy to adsorb contaminants, thereby generating additional contaminants.

Accordingly, the present invention provides a nano-zeolite modified with an alkylene diamine having 1 to 4 carbon atoms having a large specific surface area and an average volume of pores, and a process for producing the same.

The nano-zeolite according to the present invention is modified with an alkylene diamine having 1 to 4 carbon atoms, and the average BET specific surface area and average pore volume of the zeolite are optimized in comparison with general zeolite, so that the zeolite has excellent adsorbability against pollutants such as carbon dioxide and heavy metals in the air But also can separate and / or adsorb pollutants with high selectivity and thus can be usefully used in various fields requiring separation and / or removal of pollutants in the atmosphere and / or water.

Hereinafter, the present invention will be described in more detail.

The present invention provides, in one embodiment, a nano-zeolite modified with an alkylenediamine having from 1 to 4 carbon atoms.

The nano-zeolite according to the present invention has a structure in which silicon oxide (SiO ₄ ) and aluminum oxide (AlO ₄ ) three-dimensionally share an oxygen (O) atom and form a network. At this time, the nano-zeolite includes channels and pores at the level of several nanometers (nm) on the inside and the outside, and the surfaces of the pores and channels formed on the surface and inside and outside of the particle are modified with alkylene diamines having 1 to 4 carbon atoms .

Here, the reforming means that the nano zeolite and the alkylene diamine form a hydrogen bond as shown in Fig. Specifically, as shown in FIG. 1, the nitrogen (N) atom of the alkylene diamine forms a hydrogen bond with the hydrogen (H) atom bonded to the hydroxyl group (-OH) of the nano zeolite, or oxygen O) atom forms a hydrogen bond with the hydrogen (H) atom of the alkylenediamine.

The nano-zeolite according to the present invention has a shape in which pores and channels formed on the surface and inner and outer surfaces of the particles are modified with an alkylene diamine, so that the average BET specific surface area as well as the average volume of pores and channels are optimized, Can be adsorbed with high efficiency.

Here, the alkylene diamine having 1 to 4 carbon atoms is not particularly limited as long as it is an alkylene group-containing compound having an amine group at both ends thereof. However, as the chain length of the alkylene group becomes longer, the adsorbing ability to the contaminant decreases. Group is preferably used as the alkylene diamine. In one example, the alkylenediamine may be methylenediamine, ethylenediamine, propylenediamine, or butylenediamine. Specifically, the alkylenediamine may be any one of ethylenediamine and propylenediamine having high absorption efficiency against contaminants such as carbon dioxide have.

In addition, the alkylene diamine having 1 to 4 carbon atoms is modified with nano-zeolite so that any one of two amine groups present in the molecule forms a hydrogen bond with the nano zeolite to form a quaternary ammonium ion (-NH ₃ ⁺ ) form, And the other may be present as a primary amine group (-NH ₂ ). As an example, a case to perform infrared spectroscopic analysis on the modified nano-zeolite, and the peak representing the primary amine coupling can be found about 1600 ± 5㎝ ^-1 and at 2880 ± 10㎝ ^-1.

In addition, the alkylene diamine modified nano zeolites may be particles having an average particle size at the nanoscale level. The present invention can maximize the average BET specific surface area by controlling the average particle size of the modified zeolite to the nano level. Specifically, the average particle size of the modified nano zeolite may be 500 nm or less, more specifically 400 nm or less, 300 nm or less, 200 nm or less, more specifically 10 to 200 nm, 20 to 150 nm, 150 nm, 50 to 100 nm, 90 to 150 nm, 120 to 150 nm, 90 to 110 nm, 80 to 120 nm, 80 to 110 nm or 90 to 100 nm. In addition, the average particle size distribution of the particles can be about 90% of the total zeolite, with the zeolite having an average particle size of 80 to 110 nm of about 80% of the total zeolite and the average particle size of 90 to 100 nm.

The present invention can optimize the average BET surface area and the average volume of pores while preventing the degradation of crystallinity due to low particle size by adjusting the average particle size of the modified nano zeolite to the above range.

As an example, the average BET specific surface area of the modified nano zeolite may be greater than 700 m2 / g. More specifically, the average BET specific surface area may be 700 to 1200 m2 / g, 700 to 1000 m2 / g, 700 to 950 m2 / g, 700 to 800 m2 / g, or 700 to 750 m2 / g.

As another example, the average volume of pores formed in the modified nano zeolite may be from 0.1 to 2 cm 3 / g. More specifically, the average volume of the pores is from 0.1 to 1 cm 3 / g, from 0.3 to 1 cm 3 / g, from 0.37 to 1 cm 3 / g, from 0.4 to 1 cm 3 / g, from 0.4 to 0.8 cm 3 / g, Lt; / RTI >

In addition, the modified nano-zeolite particle form can be applied without particular limitation as long as the average BET surface area is wide. For example, the nano-zeolite may be in the form of a bead, a pellet, a cube, or a chip.

Further, the modified nano zeolite may contain 0.1 to 50 parts by weight of alkylenediamine relative to 100 parts by weight of nano-zeolite, specifically 0.1 to 40 parts by weight, 0.1 to 30 parts by weight, 0.5 to 20 parts by weight, 0.5 to 15 parts by weight, 1 to 15 parts by weight, 5 to 20 parts by weight, or 2 to 10 parts by weight.

The present invention also provides, in one embodiment, 1 part by weight of nano-zeolite; And 0.5 to 20 parts by weight of an alkylene diamine having 1 to 4 carbon atoms, based on the total weight of the alkylene diamine modified nano zeolite.

The preparation method according to the present invention includes a step of mixing a nano-zeolite and an alkylenediamine having 1 to 4 carbon atoms. The present invention relates to a process for preparing a nano-zeolite which comprises contacting nano-zeolite with an alkylene diamine by adding nano-zeolite to a solution in which alkylene diamine having 1 to 4 carbon atoms is dissolved and mixing to thereby modify the surface of the nano- .

Specifically, the step of mixing the nano-zeolite and the < RTI ID = 0.0 >

Mixing nano-zeolite with an alkylenediamine having 1 to 4 carbon atoms to hydrogen-bond an alkylenediamine and a nano-zeolite; And

And drying the alkylene diamine-hydrogen bonded nano zeolite.

Here, the kind of the nano zeolite is not particularly limited, but it may preferably be synthesized by a sol-gel method. Specifically, the nano-zeolite may be prepared by aging an aqueous solution in which NaOH and sodium aluminate are dissolved, adding silica sol to the aged aqueous solution by adding dropwise thereto, and then heat-treating the mixture at 160 to 200 ° C. The formed product is then separated and washed with distilled water Lt; RTI ID = 0.0 > +0.2. ≪ / RTI > The nano zeolite thus prepared has a high heat stability at a high temperature in a short time and is excellent in stability against heat.

The alkylene diamine having 1 to 4 carbon atoms is not particularly limited as long as it is an alkylene group-containing compound having an amine group at both ends thereof. However, as the chain length of the alkylene group becomes longer, the adsorbing ability to the contaminant decreases, Lt; / RTI > is an alkylene diamine containing an alkylene group of 1 to 4 carbon atoms. In one example, the alkylenediamine may be methylenediamine, ethylenediamine, propylenediamine, or butylenediamine. Specifically, the alkylenediamine may be any one of ethylenediamine and propylenediamine having high absorption efficiency against contaminants such as carbon dioxide have.

In addition, the alkylenediamine having 1 to 4 carbon atoms may be in a solution state dissolved in an alkyl alcohol having 1 to 6 carbon atoms. Examples of the alkyl alcohol include methanol, ethanol, propanol, and butanol, and preferably methanol or ethanol.

In addition, the alkylenediamine having 1 to 4 carbon atoms may be mixed in an amount of 0.5 to 20 parts by weight, specifically 0.5 to 15 parts by weight, 1 to 10 parts by weight, or 5 to 8 parts by weight based on 1 part by weight of the nano- Can be mixed. The present invention can easily control the amount of the alkylenediamine which modifies the nano-zeolite by mixing the alkylene diamine having 1 to 4 carbon atoms with the nano-zeolite in the above-mentioned amounts.

Further, the mixing of the nano-zeolite and the alkylenediamine can be carried out at a rate of 50 rpm to 500 rpm for 5 minutes to 200 minutes, more specifically, 50 rpm to 400 rpm, 50 rpm to 300 rpm, 50 rpm to 200 rpm, 200 rpm to 400 rpm, Or from 140 rpm to 160 rpm for 5 minutes to 100 minutes, or 30 minutes to 90 minutes.

Further, the drying of the alkylene diamine-hydrogen bonded nano zeolite can be carried out at 70 ° C to 150 ° C for 1 hour to 5 hours, more specifically 70 ° C to 100 ° C, 100 ° C to 150 ° C, 120 ° C or 90 ° C to 110 ° C for 1 hour to 4 hours, 2 hours to 4 hours, 1 hour to 3 hours, or 2 hours to 3 hours.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples.

However, the following Examples and Experimental Examples are merely illustrative of the present invention, and the present invention is not limited to the following Examples and Experimental Examples.

Example  1-3. With alkylenediamines Reformed  Preparation of nano-zeolite

A mixed solution prepared by dissolving NaOH (0.7 g) and sodium aluminate (NaAlO ₂ , 0.294 g) in distilled water (120 mL) was aged at 20 ± 3 ° C for 5 hours. Then silica sol (13.2 g) Lt; / RTI > for 12 hours. The homogenous mixture was then heated at 180 ° C for 24 hours, the solid product was centrifuged and washed with distilled water until the pH reached 5. The washed solid product was dried at 120 DEG C for 12 hours to obtain a nano-zeolite.

Ethylenediamine was dissolved in methanol to prepare a solution in which ethylenediamine was dissolved at a concentration of 30% by volume, and 2 g of the previously obtained nano zeolite was added to the prepared solution. Thereafter, the mixture was stirred at 22 ± 2 ° C. at 150 ± 10 rpm for 60 minutes, filtered, and the filtered solid was dried at 100 ± 5 ° C. for 3 hours to obtain an ethylene diamine modified nano zeolite. The amount of the ethylenediamine solution used and the content of ethylenediamine contained in the modified nano zeolite are shown in Table 1 below.

Amount of ethylene diamine solution used The content of the modified nano-zeolite
Content of ethylenediamine Example 1 5 ml 1 wt% Example 2 50 ml 10 wt% Example 3 75 ml 15 wt%

Comparative Example  1. Preparation of nano-zeolite

A mixed solution prepared by dissolving NaOH (0.7 g) and sodium aluminate (NaAlO ₂ , 0.294 g) in distilled water (120 mL) was aged at 20 ± 3 ° C for 5 hours. Then silica sol (13.2 g) Lt; / RTI > for 12 hours. The homogenous mixture was then heated at 180 ° C for 24 hours, the solid product was centrifuged and washed with distilled water until the pH reached 5. The washed solid product was dried at 120 DEG C for 12 hours to obtain a nano-zeolite.

Comparative Example  2. With alkylenediamines Reformed  Preparation of zeolite

The procedure of Example 1 was repeated except that zeolite having an average particle size of 2 1 탆 was used in place of the nano zeolite in Example 1 to obtain a zeolite modified with ethylenediamine.

Experimental Example  One.

In order to confirm the surface properties of the alkylene diamine modified nano zeolite according to the present invention, the following experiment was conducted.

First, the zeolite obtained in Examples 1 to 3 and Comparative Examples 1 to 3 was subjected to a scanning electron microscope (SEM, Hitachi S-4700, Japan) analysis to measure the average particle size of the nano-zeolite.

In addition, the stripping the zeolite at 100 ± 5 ℃, and nitrogen (N ₂₎ gas analyzers and BET mean of average BET specific surface area and porosity of the zeolite by using the (ASAP 2020, Micormeritics Instrument Co., Norcross, GA, USA) The volume was measured. The measured results are shown in Table 2 and FIG.

Average particle size Average BET specific surface area Average volume of pores Example 1 80 to 110 nm 701.24 ± 0.5 m 2 / g 0.332 ± 0.002 cm 3 / g Example 2 80 to 110 nm 736.85 ± 0.5 m 2 / g 0.293 + - 0.002 cm < 3 > / g Example 3 80 to 110 nm 776.18 ± 0.5 m 2 / g 0.198 + - 0.002 cm < 3 > / g Comparative Example 1 80 to 110 nm 698.19 占 0.5 m < 2 > / g 0.369 0.002 cm 3 / g Comparative Example 2 2 ± 1 μm 25.2 ± 0.5 m 2 / g 0.131 0.002 cm 3 / g

2, the nano zeolite of Example 2 modified with ethylenediamine according to the present invention has a hexahedron-like polyhedral particle shape and has an average particle size of 80 to 110 nm, specifically, 90 to 100 nm . Further, it was modified with an alkylenediamine and the surface was rough. On the other hand, the nano-zeolite of Production Example 1 has an average particle size and a particle shape similar to those of the nano-zeolite of Example 2, but the surface is smooth without being modified with an alkylenediamine.

Further, as shown in Table 2, it was confirmed that the average BET specific surface area of the nano-zeolite of the Example was increased as compared with the nano-zeolite of Comparative Example 1. [ This indicates that the average particle size of the alkylene diamine-modified nano zeolite is similar to that of the nano-zeolite not modified with the alkylene diamine, but the average BET specific surface area and the average volume of the pores are different.

Experimental Example  2.

The following experiment was conducted to confirm the binding state of the alkylenediamine contained in the nano zeolite according to the present invention.

Specifically, Fourier Example 2 was prepared in a KBr pellet nano zeolite obtained in the infrared region of 400 to 4500㎝ ^-1 with a resolution of 4㎝ ^-1 transform-infrared spectroscopy was conducted (FT-IR) analysis, and The results are shown in Fig.

Nano-zeolite of Example 2. Referring to Figure 3, is 510 ± 10㎝ ^-1 and 1000 ± 10㎝ ^-1 peak area that is the aluminum oxide and silicon oxide contained in the zeolite in the presence, and 1600 ± 10㎝ ^-1 and It can be confirmed that a peak identified in the primary amine group is present in the region of 2880 ± 10 cm ^-1 . In addition, the nano zeolite was found to have peaks indicating stretching and bending vibrations of OH groups in the regions of 1620 25 cm ^-1 and 3432 10 cm ^-1 including water.

From these results, it can be seen that the nano zeolite according to the present invention has a structure in which an alkylene diamine is bonded to the surface, and contains a small amount of water therein.

Experimental Example  3.

The following experiments were carried out to evaluate the carbon dioxide adsorption performance of the alkylene diamine-modified nano zeolite according to the present invention.

Specifically, the nano zeolite obtained in Example 2 was charged into a reactor (diameter: 3 cm, height: 40 cm), and a mixed gas of carbon dioxide (CO ₂ ) and nitrogen (N ₂ ) was supplied into the reactor for 30 minutes. (CO ₂ ) concentration of the mixed gas exiting the reactor through the nano-zeolite was measured using a gas chromatograph (Series 9610-Alphal Omega Instruments). At this time, the mixed gas is injected into the reactor at a rate of 0.4 ± 0.1 L / min so that the internal pressure of the reactor is maintained at 1 atm. The mixing ratio of carbon dioxide (CO ₂ ) and nitrogen (N ₂ ) Respectively. In addition, the temperature of the reactor was adjusted to 70 ± 2 ° C when the mixed gas was injected, and the carbon dioxide adsorption capacity per nano-zeolite unit mass was derived from the measured results.

In the same manner, the adsorption capacity of carbon dioxide per unit mass of the zeolite obtained in Comparative Examples 1 to 3 was evaluated. The results are shown in Table 3 below.

Carbon dioxide adsorption capacity Example 2 7.48 ± 0.05 mmol / g Comparative Example 1 2.86 ± 0.05 mmol / g Comparative Example 2 0.17 ± 0.05 mmol / g

As shown in Table 3, the alkylene diamine-modified nano zeolite according to the present invention showed excellent adsorption performance to carbon dioxide.

Specifically, the nano zeolite of Example 2 absorbed 7.48 ± 0.05 mmol of carbon dioxide per unit g at 70 ± 2 ° C. On the other hand, it was confirmed that the zeolite of Comparative Example 2 at the micrometer level, in which the nano-zeolite of Comparative Example 1 and the alkylene diamine, which had not been modified with alkylene diamine, had a remarkably low adsorption capacity for carbon dioxide.

In addition, in the case of Comparative Example 3 in which the nano-zeolite was modified with an alkylene diamine having a carbon number of 5 or more, it was confirmed that the adsorption performance to carbon dioxide was lower than that of the zeolite of Example 2 modified with an alkylenediamine having 2 carbon atoms.

From these results, it can be seen that the nano-zeolite modified with an alkylene diamine having 1 to 4 carbon atoms has excellent adsorption performance against carbon dioxide.

Experimental Example  4.

According to the present invention, the following experiment was carried out to evaluate the adsorption performance of heavy alkylene diamine-modified nano-zeolite in water.

1: 1: 1: 1) of nickel (II), copper (II), cadmium (II) and lead (II) was prepared by adding 0.5 g of the zeolite prepared in Example 2 and Comparative Examples 1 to 3, 1 (200 ml) was injected. Thereafter, the mixture was stirred at room temperature (24 占 占 폚) for 3 hours to bring the zeolite into contact with the heavy metals in the aqueous solution. At this time, the concentration of the heavy metal dissolved in the mixture was controlled to 300 ± 20 mg / L, and the pH of the mixture was adjusted to be 6. After stirring, zeolite was filtered and the content of each heavy metal in the filtrate was measured. Each time, the average adsorption capacity and heavy metal removal efficiency of zeolite were calculated for each heavy metal three times. The results are shown in Table 4 below.

Example 1 Comparative Example 1 Comparative Example 2 nickel Average adsorption capacity 129.7 ± 0.5 mg / g 103.2 ± 0.5 mg / g 8.87 ± 0.05 mg / g Removal efficiency 83 ± 2% 66 ± 2% 5.6 ± 0.2% Copper Average adsorption capacity 142.1 ± 0.5 mg / g 111.8 ± 0.5 mg / g 8.53 ± 0.05 mg / g Removal efficiency 85 ± 2% 67 ± 2% 5.1 ± 0.2% cadmium Average adsorption capacity 151.6 ± 0.5 mg / g 124.3 ± 0.5 mg / g 6.72 ± 0.05 mg / g Removal efficiency 89 ± 2% 73 ± 2% 3.9 ± 0.2% lead Average adsorption capacity 183.6 ± 0.5 mg / g 139.5 ± 0.5 mg / g 9.91 ± 0.05 mg / g Removal efficiency 91 ± 2% 69 ± 2% 4.9 ± 2%

As shown in Table 4, the alkylene diamine-modified nano zeolite according to the present invention exhibited excellent adsorption performance against heavy metals present in water.

Specifically, the nano-zeolite of Example 2 adsorbed nickel ions, copper ions, cadmium ions, and lead ions present in water in amounts of 129.7 ± 0.5 mg, 142.1 ± 0.5 mg, 151.6 ± 0.5 mg and 183.6 ± 0.5 mg, To remove heavy metal ions present in the water at an efficiency of about 80% or more. On the other hand, the zeolite of the micrometer-leveled Comparative Example 2 modified with the nano-zeolite of Comparative Example 1 which was not modified with an alkylene diamine and the alkylene diamine was found to remove heavy metal ions with a remarkably low efficiency of adsorption to heavy metal ions .

From these results, it can be seen that the nano-zeolite modified with an alkylene diamine having 1 to 4 carbon atoms has an excellent adsorption performance against a heavy metal present in water.

Claims (10)

As the nano-zeolite modified with an alkylene diamine having 1 to 4 carbon atoms,
The modified nano zeolite may be prepared,
And 0.5 to 20 parts by weight of an alkylenediamine based on 100 parts by weight of the modified nano zeolite,
An average BET specific surface area of 700 m < 2 > / g or more,
Wherein the average pore volume is 0.1 to 2 cm < 3 > / g.
The method according to claim 1,
The alkylenediamine is one kind selected from the group consisting of ethylenediamine and propylenediamine.
The method according to claim 1,
Wherein the alkylenediamine forms a hydrogen bond with the nano-zeolite.
The method according to claim 1,
Wherein the modified nano zeolite has an average particle size of 500 nm or less.
delete delete A process for producing an alkylenediamine-modified nano-zeolite according to claim 1, which comprises mixing nano-zeolite and an alkylenediamine having 1 to 4 carbon atoms.
8. The method of claim 7,
The step of mixing the nano-zeolite and the alkylenediamine,
Mixing nano-zeolite with an alkylenediamine having 1 to 4 carbon atoms to hydrogen-bond an alkylenediamine and a nano-zeolite; And
A process for producing an alkylene diamine modified nano zeolite comprising the step of drying an alkylene diamine-hydrogen bonded nano zeolite.
9. The method of claim 8,
Wherein the mixing of the nano-zeolite and the alkylenediamine is carried out at a speed of 50 rpm to 500 rpm for 5 minutes to 200 minutes.
9. The method of claim 8,
Wherein the drying is carried out at 70 DEG C to 150 DEG C for 1 hour to 5 hours.

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