WO2009044965A1

WO2009044965A1 - Lipophilic silicate functioning to remove foul smells and volatile organic compounds and method of preparing the same

Info

Publication number: WO2009044965A1
Application number: PCT/KR2008/000834
Authority: WO
Inventors: Dong Han Bae; Kyoung Tai No; Jung Sup Kim; Hee Sang Park; Oh Young Kwon
Original assignee: Chirolite Inc.
Priority date: 2007-10-04
Filing date: 2008-02-13
Publication date: 2009-04-09
Also published as: KR20090034506A

Abstract

Disclosed herein is a lipophilic silicate, having a function of removing foul smells and VOCs, including a low-polarity silicate bonded with an organic modifier composed of an alkyl compound, and a method of preparing the lipophilic silicate. The lipophilic silicate is advantageous in that foul smells and VOCs can be easily removed by the lipophilic silicate bonded with an organic modifier without using harmful materials, in that, since the physical properties of the lipophilic silicate do not change even when it is mixed with resins and repeatedly used, the physical properties of the final resin are maintained and the functionality of the lipophilic silicate is prevented from deteriorating, and in that the lipophilic silicate has various uses, such as storage containers for petroleum products and volatile liquid materials, adsorbents for materials discharged from synthetic organic chemical manufacturing equipment or paint manufacturing equipment, paint, wallpaper, glass, finishing materials, interior materials, and the like.

Description

LIPOPHILIC SILICATE FUNCTIONING TO REMOVE FOUL

SMELLS AND VOLATILE ORGANIC COMPOUNDS AND

METHOD OF PREPARING THE SAME

Technical Field

[1] The present invention relates to a lipophilic silicate having a function of removing foul smells and volatile organic compounds and a method of preparing the lipophilic silicate, and, more particularly, to a lipophilic silicate having a function of removing foul smells and volatile organic compounds, which is a low-polarity silicate, formed by treating a silicate with an organic modifier, and which is uniformly dispersed and easily intercalated when the lipophilic silicate is mixed with a synthetic resin, which is a lipophilic resin, thus removing foul smells and volatile organic smells, and a method of preparing the lipophilic silicate. Background Art

[2] Generally, most synthetic resins have lipophilicity, and emit harmful gases, causing sick car syndrome. Therefore, efforts to develop new synthetic resins and impart a function of removing smells thereto have been continuously and simultaneously made. Further, in the case of synthetic resins used as interior and exterior materials for cars and electric and electronic products, continuous efforts to redice fuel consumption and improve productivity by decreasing the weight of cars have been made.

[3] Various technologies for using a silicate as an agent for removing foul smells and redicing weight have been continuously developed. Silicate has a long chain structure or a two-dmensional sheet structure, and aluminosilicate, in which silicon is substituted with aluminum, has a three-dimensional framework structure. These silicates have very polar hydrophilicity because of charge balancing cations, which are introduced in order to counterbalance anions that are necessarily included therein due to the covalent bond between silicon and oxygen, the covalent therebetween being a basic backbone of silicate, and hydroxy (-OH) groups placed at the ends thereof. Therefore, silicate is problematic in that, when it is mixed with synthetic resins, most of which are lipophilic, it is not easily dispersed or intercalated therein, thus worsening the surface of molded products or remarkably deteriorating the physical properties of resin.

[4] Recently, as represented by sick house syndrome and sick car syndrome, environmental pollution problems, caused by harmful materials, svch as formaldehyde, etc., dscharged from house-buildng materials, have rapidly become serious. Furthermore, in addition to formaldehyde, persistent volatile organic compounds having an aromatic ring, such as xylene, methyl mercaptan, hydrogen sulfide, phenol, trimethyl amine, etc., have also been regulated by environmental guidelines for indoor air.

[5] Here, the term "VOCs (volatile organic compounds)" refers to petrochemicals selected from among hydrocarbons having a Reid vapor pressure of 10.3 kPa (1.5 psia), and is defined as materials, sirh as organic solvents, etc., set forth by the Minister of the Environment after consultation with the representative of the related central administrative agency (Sub-Section 1 of Section 39 of Enforcement Ordnance of the Atmospheric Environment Preservation Law). Meanwhile, in the U.S. Environmental Protection Agency (USEPA), the term "VOCs (volatile organic compounds)" is defined as organic compounds that increase the concentration of o»ne present at the surface of the earth by the photochemical oxidation reaction with nitrogen oxides (NOx) using solar light, thereby causing a smog phenomenon.

[6] As typical harmful effects of VOCs, the VOCs drectly harm the human body, and cause acute symptoms, sirh as anesthesia (inhibition of central nervous system), dzziness, paralysis, death, and the like when the human body is exposed to highly- concentrated VOCs.

[7] Since the 1980' s, Korean industry has rapidly developed, and thus attempts to improve national welfare and increase national income have been made. As a result, foul smells and pollutants, sirh as VOCs, have been dscharged from various raw materials and wastes, which are industrial by-prodcts. In the Yeochun petrochemical complex in 1996, there was civil unrest when VOCs, dscharged in the processes of refining oil and producing petrochemicals, harmed residents living near this petrochemical complex. Further, most civil protests occurring in the Sihwa industrial complex in 1997 were in response to the dscharge of VOCs.

[8] Methods of treating such VOCs may include a method of collecting and then reusing the VOCs and a method of decomposing the VOCs. When VOCs are dscharged through only one outlet at a relatively high concentration and are economically useful, it is preferred that a VOCs collection system be provided. In the method of collecting and then reusing the VOCs, technologies of adsorption using active carbon, washing and low-temperature condensation can be used when the VOCs can be collected. In contrast, when VOCs are composed of blends of materials, rather than a single kind of material, are harmful materials, or are not worth collecting, it is preferred that a VOC decomposition system, rather than the VOC collection system, be provided. In the method of decomposing the VOCs, technologies of thermal incineration, catalytic incineration and bio-filtration can be used when the VOCs can be decomposed.

[9] Meanwhile, as prior patents related to deodorant, Korean Registered Patent No.

32511 discloses a deodorant produced by mixing rice bran with yeast, adding zeolite to the mixture, kneadng and fermenting the mixture, adding iron sulfate to the mixture and then drying the mixture, and Korean Registered Patent No. 139559 discloses an activated and carbonized fiber and an activated and carbonized non- woven fabric, and a method of prodtring the same. Further, Korean Patent Publication No. 1990-009130 discloses a method of prodtcing a carbon dioxide adsorbent using a natural zeolite, comprising the steps of heat-treating a mordenite-based natural zeolite at a temperature of 200 ~ 35O⁰C, acidizing the zeolite using a 0.8 N or lower hydrochloric acid solution, and ion-exchanging the zeolite using a 0.7 N or lower calcium chloride solution.

[10] However, sirh conventional methods of treating foul smells and VOCs are problematic in that the foul smell removal efficiency is very low, initial costs are high, secondary waste is generated, and operational costs are also uneconomical, and thus the usability of the methods is very low when the methods are applied in the field, and particularly, when the methods are used in an incineration system, operational costs increase due to additional fuel costs, residence time decreases due to the increase in gas flow rate, fuel gases burn incompletely when they do not mix easily, and thus the methods are unsuitable for use when the change in gas flow rate is great, and in that, when gas flow rate increases, the temperature of a combustion chamber decreases, so that the treatment efficiency of foul smells and VOCs decreases, with the result that low-concentration VOCs cannot be effectively treated. Disclosure of Invention Technical Problem

[11] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a lipophilic silicate having a function of removing foul smells and volatile organic compounds, which is easily dispersed and intercalated when the lipophilic silicate is mixed with a lipophilic synthetic resin.

[12] The above object of the present invention can be accomplished by forming a lipophilic silicate including a low-polarity silicate bonded with an organic modifier composed of an alkyl compound.

[13] Another object of the present invention is to provide a method of preparing a lipophilic silicate, by which foul smell removal efficiency is increased, initial costs and operational costs are reduced, and secondary waste is not produced, so that the method can be used even when the change of flow rate is great, and low-concentration VOCs can also be effectively treated.

[14] The above object of the present invention can be accomplished by providing a method of preparing a lipophilic silicate, including: dispersing a silicate in water; mixing an alkyl compound, serving as an organic modifier, with the dispersed silicate to form a mixture; intercalating ions of the alkyl compound into crystal spaces of the silicate by reacting the mixture at atmospheric pressure at 20 ~ 100⁰C to decrease the polarity of the silicate; and drying the intercalated mixture. Technical Solution

[15] The present invention provides a lipophilic silicate, having a function for removing foul smells and VOCs, including a low-polarity silicate bonded with an organic modifier composed of an alkyl compound.

[16] In particular, the present invention provides a lipophilic silicate, which can maintain physical properties constant by minimizing the absorption of water, improve the quality of the surface of a molded product, and function to remove foul smells from the molded product and to decrease the weight of the molded product, when the lipophilic silicate is used in a final resin as a functional additive.

[17] Zeolite is an aluminum silicate mineral including alkali metals, sirh as sodum, potassium, etc., alkali earth metals, sirh as calcium, etc., and crystal water. There are many kinds of zeolite, but two kinds of zeolite, clinoptilolite and mordenite, are chiefly distributed. Research on the synthesis of zeolite, which has begun to analyze the formation conditions and environment of natural zeolite by mineralogists, has been enthusiastically conducted since a series of zeolite synthesis tests successfully conducted for the purpose of the industrial application of zeolite by Union Carbide Corp. in the 1940' s. Generally, the synthesis of zeolite is conducted at a temperature of 200⁰C or lower using a hydrothermal synthesis method.

[18] The synthesis of zeolite of the present invention is conducted using aluminosilicate as a raw material. Generally, in the synthesis of zeolite, no particular pressure conditions are required, and reactions are conducted at low temperature.

[19] Unlike general structured water, the crystal water included in zeolite is referred to as

'zeolitic water" because it exists in the form of a water molecule. Even when zeolite is dehydrated through a heating process, the structure of the crystal water included in the zeolite is not changed, so that the places at which water molecules remain have the form of pores or sponges and then the original state is recovered by adsorbing gas or moisture thereon. Therefore, the use of the crystal water included in zeolite becomes more widespread because it has adsorptivity, hygroscopiάty, cation exchange, and other desirable properties.

[20] Specifically, the present invention provides a lipophilic silicate, which exhibits low polarity and high lipophiliάty because silicate is treated with organic compounds of 10 to 70 carbon atoms, which can efficiently remove foul smells and volatile organic compounds (VOCs), sirh as formaldehyde, methylmercaptan, hydrogen sulfide, phenol, xylene, trimethylamine, etc. because the lipophilic silicate is added to a resin and is then stably dispersed in the resin, and which can prevent the infiltration of water, so that physical properties thereof are maintained, with the result that final resin, produced using the lipophilic silicate, can be used as interior material, such as wallpaper, chairs, furniture, etc., or upholstery for cars, vehicles, ships, airplanes, etc.

[21] The lipophilic silicate may include 1 ~ 1000 parts by weight of the silicate and 0.1 ~

20 parts by weight of the organic modifier. When the composition of the lipophilic silicate is within this range, the lipophilic silicate exhibits a function of preventing the infiltration of water. In contrast, when the composition thereof departs from this range, the lipophilidty of the lipophilic silicate is decreased.

[22] The silicate may be a spherical silicate, a powdered silicate, a dsc-shaped silicate, a supported silicate, or an amorphous silicate. The lipophilic silicate using the spherical silicate may be used for paint, glass, finishing materials, etc., which are uniformly dispersed and thickly coated, the lipophilic silicate using the powdered silicate may be used for coating agents, finishing materials, etc., which are uniformly dispersed and thinly coated, the lipophilic silicate using the dsc-shaped silicate may be used for putty, interior material, etc., which are very thickly coated, the lipophilic silicate using the supported silicate may be used for finishing materials that use a special resin containing metal, etc., and the lipophilic silicate using the amorphous silicate may be used for mortar, interior material, etc., but the use of the lipophilic silicate of the present invention is not limited thereto.

[23] In particular, the silicate may be a spherical aluminosilicate, a powdered alumino- silicate, or soda-lime silicate.

[24] The lipophilic silicate using the spherical aluminosilicate may be used for heat insulating paints, putties, glass, finishing materials, etc., the lipophilic silicate using the powdered aluminosilicate may be used for coating agents for thin film, wallpaper, finishing materials, etc., and the lipophilic silicate using the soda- lime silicate may be used for plate glass, interior materials, etc., but the use of the lipophilic silicate of the present invention is not limited thereto.

[25] Further, the organic modifier may include alkyl ammonium of 10 to 70 carbon atoms. The organic modifier, which is a macromolecule, serves to redtce the polarity of the silicate through the ion-exchange reaction between charge balance cations of the silicate and the organic modifier.

[26] Here, the organic modifier may include one or more selected from among cet- rimonium chloride, steartrimonium chloride, benzethonium chloride, behentrimonium chloride, dstearyldmonium chloride, stearalkonium chloride, lauryldmethylben- zylammonium chloride, and lecithin.

[27] In this case, the organic modfier is a kind of alkylammonium chloride, but is not limited thereto.

[28] The organic modfier may be used independently or in combination dependng on the use of the lipophilic silicate.

[29] The lipophilic silicate has a function of removing foul smells and VOCs. Here, the function of removing foul smells and VOCs is a unique property of silicate. However, when the physical properties of the silicate are stabilized and maintained by lipo- philization of the silicate, the unique property of the silicate is doubled, and thus foul smells and VOCs can be more easily removed.

[30] Tests for evaluating the ability to remove foul smells and VOCs in the lipophilic silicate were conducted by the method of evaluating the ability to remove foul smells and VOCs.

[31] In the method of evaluating the ability to remove foul smells and VOCs, synthesized lipophilic silicate is put into a white transparent box, gas for deodarization is injected into the white transparent box sirh that the concentration of the gas in the box is constant, a constant amount of the gas is extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the gas remaining in the box is measured using a detector tube, and then the measured concentration is compared with that of a blank, thus calculating the ability (%) to remove foul smells and VOCs in the lipophilic silicate.

[32] Examples of the gas for deodarization may include formaldehyde, phenol, methylmercaptan, hydrogen sulfide, trimethylamine, styrene, and the like.

[33] Further, as described above, the lipophilic silicate may be used for paint, coating agents, putties, mortar, wallpaper, glass, storage containers, adsorbents, thermal insulators, finishing materials, and interior materials, but the use of the lipophilic silicate is not limited thereto.

[34] Further, the present invention provides a method of preparing a lipophilic silicate, including the steps of dispersing a silicate in water; mixing an alkyl compound, serving as an organic modifier, with the dispersed silicate to form a mixture; intercalating ions of the alkyl compound into crystal spaces of the silicate by reacting the mixture at atmospheric pressure at 20 ~ 100⁰C to decrease the polarity of the silicate; and drying the intercalated mixture.

[35] In the method of preparing a lipophilic silicate, the silicate is dispersed in water using a stirrer, and the dispersed silicate is mixed with an alkyl compound using the stirrer to condtct a cation exchange reaction between the silicate and the alkyl compound. Subsequently, the mixture is heated at atmospheric pressure, thus enabling caions of the alkyl compound to be intercalated into the crystal spaces of the silicate, and simultaneously causing the alkyl compound to be stably bonded with the silicate. Finally, the intercalated silicate is dried, thereby preparing a lipophilic silicate.

[36] The prepared lipophilic silicate may have a long chain stricture, a two-dimensional sheet stricture, or a three-dimensional framework stricture. The structure of the prepared lipophilic silicate depends on the shape of the lipophilic silicate bonded with the organic modifier.

[37] In the step of decreasing the polarity of the silicate, an ion-exchange reaction between charge balancing cations of the silicate and the organic modifier may be performed. The organic modifier and the silicate are intercalated to each other through an ion-exchange reaction, thus decreasing the polarity of the silicate. The hydroxy (OH-) groups placed at the end of the silicate exhibit polarity, but the polarity of the hydroxy (OH-) groups is weakened somewhat due to the intercalation of the organic modifier and the silicate, thus obtaining a lipophilic silicate.

[38] FIG. 1 is a photograph showing the lipophilicity of the lipophilic silicate prepared the above method. As shown in FIG. 1, the lipophilic silicate is not mixed with water, and is separated from water. Further, since the apparent specific gravity of the lipophilic silicate is lower than that of water, the lipophilic silicate is located on top of the water.

Advantageous Effects

[39] As described above, the lipophilic silicate having a function for removing foul smells and VOCs and the preparation method thereof is advantageous in that foul smells and VOCs can be easily removed by the lipophilic silicate bonded with an organic modifier without using harmful materials, in that, since the physical properties of the lipophilic silicate do not change even when it is mixed with resins and repeatedly used, the physical properties of the final resin are maintained, and the function deterioration of the lipophilic silicate is prevented, and in that the lipophilic silicate has various uses, sirh as storage containers for petroleum products and volatile liquid materials, adsorbents for materials discharged from synthetic organic chemical manufacturing equipment or paint manufacturing equipment, paint, wallpaper, glass, finishing materials, interior materials, and the like. Brief Description of the Drawings

[40] FIG. 1 is a photograph showing the lipophilicity of the lipophilic silicate prepared according to the present invention;

[41] FIG. 2 is a scanning electron micrograph (SEM) (X 2000) of the lipophilic silicate prepared according to Example 2 of the present invention, and FIG. 3 is a scanning electron micrograph (SEM) (X 8000) of the lipophilic silicate prepared according to Example 2 of the present invention; and

[42] FIG. 4 is a scanning electron micrograph (SEM) (X 2000) of the lipophilic silicate prepared according to Example 8 of the present invention, and FIG. 5 is a scanning electron micrograph (SEM) (X 8000) of the lipophilic silicate prepared according to Example 8 of the present invention. Mode for the Invention

[43] Hereinafter, the present invention will be described in detail with reference to

Examples.

[44] A better understanding of the present invention may be obtained through the following examples which are set forth to illustrate, but are not to be construed as the limit of the present invention.

[45]

[46] Example 1

[47] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of cetrimonium chloride (Ci₉H₄₂NCl), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 49 g of lipophilic aluminosilicate.

[48] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 1.

[49] Table 1 [Table 1] [Table ]

[50] From Table 1, it can be seen that the lipophilic aluminosilicate synthesized in Example 1 was white powder, and had a pH of 9.8, a particle size of 4.01 μm, an apparent specific gravity, which was apparently determined by the volume of porous or powdered materials, of 0.53, a water content of 3.2% and a moisture absorption rate of 4.5%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 1 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipophilicity.

[51] [52] Example 2 [53] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of steartrimonium chloride (C₂iH₄₆NCl), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 50 g of lipophilic aluminosilicate.

[54] FIGS. 2 and 3 show scanning electron micrographs (SEMs) of the lipophilic aluminosilicate obtained in Example 2. [55] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 2. [56] Table 2 [Table 2] [Table ]

[57] From Table 2, it can be seen that the lipophilic aluminosilicate synthesized in Example 2 was white powder, and had a pH of 10.8, a particle size of 3.35 μm, an apparent specific gravity of 0.49, a water content of 2.8% and a moisture absorption rate of 4.2%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 2 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[58] [59] Example 3 [60] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of benzethonium chloride (C₂₇H₄₂NClO₂), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 48 g of lipophilic aluminosilicate.

[61] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 3. [62] Table 3 [Table 3] [Table ]

[63] From Table 3, it can be seen that the lipophilic aluminosilicate synthesized in Example 3 was white powder, and had a pH of 10.0, a particle size of 3.51 /M, an apparent specific gravity of 0.45, a water content of 3.1% and a moisture absorption rate of 3.9%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 3 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[64] [65] Example 4 [66] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of behentrimonium chloride (C₂₅H₅₄NCI), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 49 g of lipophilic aluminosilicate.

[67] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 4.

[68] Table 4 [Table 4] [Table ]

[69] From Table 4, it can be seen that the lipophilic aluminosilicate synthesized in

Example 4 was white powder, and had a pH of 11.8, a particle size of 3.71 μm, an apparent specific gravity of 0.45, a water content of 3.6% and a moisture absorption rate of 4.5%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 4 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[70]

[71] Example 5

[72] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of dstearyldmonium chloride (C ₃₇H_8ONC1), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 48 g of lipophilic aluminosilicate.

[73] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 5.

[74] Table 5

[Table 5] [Table ]

[75] From Table 5, it can be seen that the lipophilic aluminosilicate synthesized in Example 5 was white powder, and had a pH of 10.3, a particle size of 3.51 μm, an apparent specific gravity of 0.51, a water content of 4.3% and a moisture absorption rate of 4.5%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 5 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[76] [77] Example 6 [78] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of stearalkonium chloride (C₂₇H₅₀NCl), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 47 g of lipophilic aluminosilicate.

[79] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 6.

[80] Table 6 [Table 6] [Table ]

[81] From Table 6, it can be seen that the lipophilic aluminosilicate synthesized in Example 6 was white powder, and had a pH of 10.5, a particle size of 3.65 μm, an apparent specific gravity of 0.41, a water content of 2.5% and a moisture absorption rate of 3.9%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 6 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[82] [83] Example 7 [84] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of lauryldmethylbenzylammonium chloride (C₂iH₃₈ NCl), which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 50 g of lipophilic aluminosilicate.

[85] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 7. [86] Table 7 [Table 7] [Table ]

[87] From Table 7, it can be seen that the lipophilic aluminosilicate synthesized in Example 7 was white powder, and had a pH of 10.2, a particle size of 3.57 μm, an apparent specific gravity of 0.39, a water content of 4.8% and a moisture absorption rate of 3.9%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 7 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[88] [89] Example 8 [90] 50 g of aluminosilicate was put in 1Of of water, and was then dispersed therein at room temperature. Thereafter, 1 g of lecithin, which is a quaternary ammonium salt, was added thereto and then dissolved to form a reaction solution. Subsequently, this reaction solution was stirred at a stirring speed of 350 rpm at a temperature of 8O⁰C for 20 hours, filtered, and then dried at a temperature of 8O⁰C to obtain 50 g of lipophilic aluminosilicate.

[91] FIGS. 4 and 5 show scanning electron micrographs (SEMs) of the lipophilic aluminosilicate obtained in Example 8. [92] The result of component analysis of the synthesized lipophilic aluminosilicate is given in Table 8. [93] Table 8 [Table 8] [Table ]

[94] From Table 8, it can be seen that the lipophilic aluminosilicate synthesized in

Example 8 was white powder, and had a pH of 11.2, a particle size of 3.41 μm, an apparent specific gravity of 0.39, a water content of 3.9% and a moisture absorption rate of 5.0%, and that heavy metals were not detected therein. Further, it was found that the lipophilic aluminosilicate synthesized in Example 8 contained a very small amount of water and had a low moisture adsorption rate, and thus exhibited lipo- philidty.

[95]

[96] Test Example: deodorization performance test

[97] 1. Formaldehyde deodarization rate

[98] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 51 white transparent box, formaldehyde gas was injected into the white transparent box such that the concentration of the formaldehyde gas in the box was 50 ppm, a constant amount (lOOm-6) of the formaldehyde gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the formaldehyde gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a formaldehyde deodarization rate (%).

[99] 2. Phenol deodarization rate

[100] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 51 white transparent box, phenol gas was injected into the white transparent box such that the concentration of the phenol gas in the box was 50 ppm, a constant amount (lOOm-6) of the phenol gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the phenol gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a phenol deodarization rate (%).

[101] 3. Methylmercaptan deodarization rate

[102] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 51 white transparent box, methylmercaptan gas was injected into the white transparent box sirh that the concentration of the methylmercaptan gas in the box was 50 ppm, a constant amount (lOOm-6) of the methylmercaptan gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the methylmercaptan gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a methylmercaptan deocbrization rate (%).

[103] 4. Hydrogen sulfide deodarization rate

[104] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 5£ white transparent box, hydrogen sulfide gas was injected into the white transparent box sirh that the concentration of the hydrogen sulfide gas in the box was 50 ppm, a constant amount (100m#) of the hydrogen sulfide gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the hydrogen sulfide gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a hydrogen sulfide deodarization rate (%).

[105] 5. Trimethylamine deodarization rate

[105] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 5£ white transparent box, trimethylamine gas was injected into the white transparent box sirh that the concentration of the trimethylamine gas in the box was 50 ppm, a constant amount (100m#) of the trimethylamine gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the trimethylamine gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a trimethylamine deodarization rate (%).

[107] 6. Styrene deodarization rate

[108] Based on the method of evaluating the ability to remove foul smells and VOCs, 100 g of the synthesized lipophilic aluminosilicate was put into a 51 white transparent box, styrene gas was injected into the white transparent box sirh that the concentration of the styrene gas in the box was 50 ppm, a constant amount (lOOm-6) of the styrene gas was extracted from the box after 0, 30, 60, 90 and 120 minutes, the concentration of the styrene gas remaining in the box was measured using a detector tube, and then the measured concentration was compared with that of a blank, thus calculating a styrene deodarization rate (%).

[109] The results of testing the deodarization rates of the lipophilic aluminosilicate synthesized in Example 2 are given in Table 9.

[110] Table 9 [Table 9] [Table ]

[111] From Table 9, it can be seen that the rates of deodarization of hydrogen sulfide and methylmercaptan are very high, the rates of deodarization of formaldehyde, phenol and styrene are high, and the rate of deodarization of trimethylamine is ordinary.

[112] The results of testing the deodarization rates of the lipophilic aluminosilicate synthesized in Example 8 are given in Table 10. [113] Table 10 [Table 10] [Table ]

[114] From Table 10, it can be seen that the rates of deodarization of trimethylamine and formaldehyde are very high, the rates of deodarization of phenol and styrene are high, and the rate of deodarization of hydrogen sulfide is low.

[115] [116] Comparative Test Example [117] The results of testing the deodarization rates of pure aluminosilicate, which was not treated with an organic modifier, are given in Table 11.

[118] Table 11 [Table 11] [Table ]

[119] From Table 11, it can be seen that the rates of deodarization of all of formaldehyde, phenol, methylmercaptan, hydrogen sulfide, styrene and trimethylamine are very low. Industrial Applicability

[120] According to the lipophilic silicate having a function for removing foul smells and VOCs and the preparation method thereof, the lipophilic silicate is light and environment-friendly, and can be highly efficiently prepared at low cost, thereby greatly contributing to the related industries.

Claims

[1] A lipophilic silicate comprising a low-polarity silicate bonded with an organic modifier composed of an alkyl compound. [2] The lipophilic silicate according to claim 1, wherein the lipophilic silicate comprises 1 ~ 1000 parts by weight of the silicate and 0.1 ~ 20 parts by weight of the organic modifier. [3] The lipophilic silicate according to claim 1, wherein the silicate is a spherical silicate, a powdered silicate, a dsc-shaped silicate, a supported silicate, or an amorphous silicate. [4] The lipophilic silicate according to claim 3, wherein the silicate is a spherical aluminosilicate, a powdered aluminosilicate, or a soda-lime silicate. [5] The lipophilic silicate according to claim 1, wherein the organic modifier comprises an alkyl ammonium of 10 to 70 carbon atoms. [6] The lipophilic silicate according to claim 5, wherein the organic modifier comprises one or more selected from among cetrimonium chloride, ste- artrimonium chloride, benzethonium chloride, behentrimonium chloride, dste- aryldmonium chloride, stearalkonium chloride, lauryldmethylbenzylammonium chloride, and lecithin. [7] The lipophilic silicate accordng to claim 1, wherein the lipophilic silicate has a function of removing foul smells and volatile organic compounds (VOCs). [8] The lipophilic silicate accordng to claim 1, wherein the lipophilic silicate is used for paint, coating agents, putty, mortar, wallpaper, glass, storage containers, adsorbents, thermal insulators, finishing materials, and interior materials. [9] A method of preparing a lipophilic silicate, comprising: dspersing a silicate in water; mixing an alkyl compound, serving as an organic modfier, with the dspersed silicate to form a mixture; intercalating ions of the alkyl compound into crystal spaces of the silicate by reacting the mixture at atmospheric pressure at 20 ~ 100⁰C to decrease a polarity of the silicate; and drying the intercalated mixture. [10] The method accordng to claim 9, wherein the prepared lipophilic silicate has a long chain structure, a two-dmensional sheet structure, or a three-dmensional framework structure. [11] The method according to claim 9, wherein the reducing of the polarity of the silicate includes: performing an ion-exchange reaction between charge balance cations of the silicate and the organic modifier.