KR20030095913A - A catalyst for removing injuriousness matterial in cigarette smoke and the catalyst - Google Patents

Abstract

PURPOSE: Provided are a method for producing a catalyst for removing noxious substance, which can minimize a content of noxious substances such as dioxin, nicotine, and tar, and thus promotes health of smoker and indirect-smoker, and a catalyst produced by the method. CONSTITUTION: The method comprises the steps of (i) dissolving at least one materials selected from metal compounds comprising platinum, silver, titanium, iron, zinc, vanadium, cerium, manganese, or molybdenum respectively to form an impregnant solution; (ii) repeatedly immersing a refractory carrier in the impregnant solution and drying the coated carrier several times; and (iii) heating the coated carrier. The metal compounds have forms of organometallic compounds, metal halide, metal nitrate, or metal acetate.

Description

A method for preparing a catalyst for removing harmful substances of cigarette smoke and a catalyst produced by the method of manufacturing the same {A catalyst for removing injuriousness matterial in cigarette smoke and the catalyst}

The present invention relates to a catalyst included in cigarettes to remove harmful substances of tobacco smoke, and more particularly, harmful substances such as nicotine, tar, dioxins, endocrine disruptors, etc. contained in the mainstream smoke and side smoke of tobacco during smoking. The present invention relates to a method for preparing a catalyst for removing harmful substances of tobacco smoke and a catalyst prepared by the method for oxidizing and removing oxidatively to remove the harmful substances.

In general, tobacco smoke may be classified into mainstream smoke which is sucked into the smoker's body by inhalation and discharged to the outside, and side smoke which is not sucked into the smoker's body. Therefore, mainstream smoke has a great effect on the health of smokers, and sidestream smoke has a great effect on the health of second-hand smokers.

Tobacco smoke is an extremely complex mixture of more than 4000 gas and particulate forms, of which about 60 compounds are known to be carcinogens that cause cancer in humans and animals. In particular, tobacco smoke contains toxic dioxins, harmful organic pollutants such as Benzo [α] pyrene, Dimethylnitrosamine, and N'-nitroso-N-nicotine, and heavy metals such as cadmium, mercury, and lead.

As a result of analyzing the dioxin concentration of tobacco, dioxins of 1 × 10 ^-12 g TEQ (Toxic Equivalents) were detected in mainstream smoke per cigarette, and 2 × 10 ^-12 g TEQ in side smoke. have.

In addition, 20 to 40 µg of Benzo [α] pyrene was detected in mainstream smoke and 68 to 136 µg of Benzo [α] pyrene was detected in side cigarette smoke, indicating a 3.4 times greater risk of indirect smoking. . Endocrine toxicity of Benzo [α] pyrene is known to be the infertility of the next generation upon exposure to gestation in animal studies.

In addition, organic pollutants and heavy metals are known to be endocrine disruptors that disrupt the function of the endocrine system and cause side effects such as decreased sperm count, genital alteration and deterioration, decreased implantation rate, and increased lactic acid rate.

As mentioned above, although the harmfulness of cigarettes is already widely known, the demand is steadily increasing because the tobacco is very addictive and it is very difficult to reduce or break it. There has been much research to reduce the toxicity of tobacco.

As a technique for reducing the toxicity of tobacco, U.S. Pat. Nos. 4,878,507, 4,915,118, 5,220,930 and 5,271,419 disclose techniques for adding chemicals to tobacco cigarette paper, improving the packaging method of paper and reducing air permeation.

U.S. Patent Nos. 4,915,117, 5,105,838 and 5,159,940 disclose techniques for embedding porous ceramics in tobacco tobacco or covering thin film ceramics on filter sections instead of paper as devices for minimizing pollution emissions of cigarette sidestream smoke. .

In addition, U.S. Patent Nos. 3,693,632, 4,182,348, 5,386,838, EP 107471, and EP 658320 disclose that organic compounds are generated from mainstream smoke and sidestream smoke by embedding the catalyst in cigarette paper or in the interior of the cigarette and filter. It discloses a technique to minimize the.

However, the above-mentioned techniques have achieved the desired results in minimizing the amount of certain components, but this is extremely insignificant considering the type and content of the harmful substances contained in tobacco smoke, and therefore it is contained in tobacco smoke. Much research and improvement has to be done to minimize the substance and its content.

Accordingly, the present invention provides a catalyst for removing harmful substances of tobacco smoke, which can help to maintain the health of smokers and second-hand smokers by minimizing the content of harmful substances such as dioxins, nicotine, tars, etc. An object thereof is to provide a production method and a catalyst prepared by the production method.

Another object of the present invention is to provide a method for producing tobacco containing a catalyst capable of minimizing the content of harmful substances in tobacco smoke using the catalyst prepared above, and a cigarette produced by the method.

In order to achieve the above object, the present invention provides a method of preparing a refractory material in an impregnation solution obtained by dissolving at least one or more substances selected from the respective metal compounds including platinum, silver, titanium, iron, zinc, vanadium, cerium, manganese or molybdenum. It provides a method for producing a catalyst for removing harmful substances of tobacco smoke, characterized in that the process of repeatedly depositing the carrier phase and drying several times.

In addition, the present invention is produced by the above-described method, wherein at least one or more substances selected from platinum, silver, titanium oxide, iron oxide, zinc oxide, vanadium oxide, cerium oxide, manganese oxide or molybdenum oxide are formed on the refractory carrier. It provides a catalyst for removing harmful substances of tobacco smoke, characterized in that the coating.

In another aspect, the present invention provides a method for producing a cigarette containing a catalyst, characterized in that the catalyst is mixed with an organic binder and spray coating the tobacco leaf and cigarette paper.

In another aspect, the present invention provides a cigarette containing a catalyst, characterized in that produced by the method for producing a cigarette.

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

In the present invention, the carrier phase of the refractory material is dipped in an impregnation solution obtained by dissolving at least one or more substances selected from the respective metal compounds including platinum, silver, titanium, iron, zinc, vanadium, cerium, manganese or molybdenum, and then drying them. Provided is a method for preparing a catalyst for removing harmful substances of tobacco smoke, which is repeated several times.

The metal compound may be in the form of organic metal compounds, metal halides, metal nitrates or metal acetates.

An impregnation solution is prepared by selecting an appropriate solvent according to the type and amount of the metal compound selected from the above metal compounds, and dissolving at least one or more of the above-described metal compounds to prepare an impregnation solution. In this case, the concentration of the metal or the metal oxide coated on the carrier can be controlled by repeatedly performing the deposition and drying processes described below several times, so that the concentration of the solution is not necessarily limited.

Although the carrier phase of the refractory material is dipped in the solution prepared as described above and dried, a conventional one can be used as the carrier phase of the refractory material. In the present invention, a carrier selected from activated alumina, titania, zeolite or cordierite was used as a carrier of the refractory.

By repeatedly depositing the carrier phase in the impregnating solution and then drying it several times, it is possible to control the concentration of the metal or metal oxide coated on the carrier, and the drying may be performed in various ways including room temperature or heat drying. .

This drying produces a catalyst for removing harmful substances contained in tobacco smoke according to the present invention. That is, a catalyst coated with at least one material selected from platinum, silver, titanium oxide, iron oxide, zinc oxide, vanadium oxide, cerium oxide, manganese oxide or molybdenum oxide on a refractory carrier is obtained.

When the catalyst is applied to tobacco, high-efficiency oxidation and removal are possible at the same time with respect to dioxins and environmental hormone substances contained in mainstream smoke and secondary smoke of tobacco, tar made of various hydrocarbons, nicotine causing tobacco poisoning, and the like.

In general, the reaction mechanism of the oxidation and removal of tar and nicotine and trace amounts of harmful organic compounds contained in mainstream smoke and sidestream smoke at high temperatures during smoking is shown in the following scheme.

C _x H _y O _z + catalyst --------> xCO ₂ + (y / 2) H ₂ O

In the above reaction mechanism, C _x H _y O _z is a general expression of all organic compounds including nicotine and tar. Organic compounds such as tar and nicotine are trapped in the pores while passing through the porous carrier, wherein the catalyst helps the organic compounds such as tar and nicotine to be easily oxidized at a relatively low temperature.

Therefore, it is important to make a coating on the cigarette by making a catalyst that decomposes tar and nicotine best at the temperature when burning the cigarette. In order to more efficiently remove the harmful substances of tobacco smoke, the present invention provides a catalyst in which a metal oxide coating layer is first formed on a carrier and a silver or platinum layer is formed on a surface thereof.

The catalyst having such a structure is first deposited on an impregnation solution obtained by dissolving at least one or more substances selected from the respective metal compounds including titanium, iron, zinc, vanadium, cerium, manganese or molybdenum in the carrier phase of the refractory. The carrier phase coated with the metal oxide is obtained by coprecipitation, and the obtained carrier phase can be obtained by impregnating the impregnation solution obtained by dissolving silver or platinum secondly, drying and heat-treating at 500 to 600 ° C.

As described above, when the metal oxide coating layer is first formed on the carrier and the silver or platinum layer is formed secondly, the selective oxidative decomposition effect of the organic compounds at a relatively high temperature by the metal oxide layer and the low temperature by the silver or platinum layer Excellent decomposition effect of volatile organic compounds can be obtained. This is better in terms of tar removal than coating only one of metal oxides or precious metals (silver, platinum) on the carrier.

In particular, dioxin and environmental hormone substances contained in the mainstream smoke and secondary smoke of tobacco, tar made of various hydrocarbons, nicotine that causes tobacco poisoning and the like can be oxidized and removed at the same time.

In the present invention, when the catalyst obtained as described above is applied to tobacco, the catalyst prepared in order to maximize the effect of removing harmful substances in tobacco smoke is mixed with an organic binder, and the tobacco containing the catalyst containing the spray coating on tobacco leaf and cigarette paper. It provides a manufacturing method.

The catalyst is preferably used that the particle is 100㎛ or less to facilitate the removal of harmful substances contained in the mainstream smoke and sidestream smoke during smoking, the particle size can be adjusted by finely pulverizing the prepared catalyst, in the process of preparing the catalyst It can be easily adjusted by using a particle size of 100 µm or less on the carrier of the refractory material.

The organic binder may be selected from those that are harmless when contained in the mainstream smoke and sidestream smoke when smoking, and the content of the catalyst is preferably 20 to 50 parts by weight based on 100 parts by weight of the spray liquid. This is to ensure that the spray is evenly coated on the cigarette while the catalyst is evenly dispersed in the spray.

Organic binders that can be used are particularly preferred alcohols which easily coat the catalyst on tobacco leaves and are harmless to the human body, and ethanol is even more preferred in alcohols. The alcohol used is sprayed onto the tobacco leaf with the catalyst, leaving only a constant strength between the tobacco leaf and the catalyst, which is then volatilized and removed.

When the coating is carried out as described above, a cigarette containing a catalyst for removing harmful substances of tobacco smoke according to the present invention can be manufactured, and the cigarette is made of dioxins and environmental hormone substances contained in mainstream smoke and side smoke during burning, and various hydrocarbons. The tar and nicotine that causes tobacco poisoning are oxidized and removed. Therefore, the cigarette according to the present invention can effectively reduce the amount of harmful substances generated in the smoking process can help to maintain the health of smokers.

Hereinafter, the present invention will be described in detail with reference to the following examples, which are only presented to aid the understanding of the present invention, but the present invention is not limited thereto.

<Example 1>

After 100 g of activated alumina, which was a carrier, was dried at 100 ± 5 ° C. for 6 hours, 0.2 mol of Titanium (IV) isopropoxide was added to a solution of 1 L of ethanol, followed by sufficient stirring. 29.5 g of diluted hydrochloric acid was slowly added dropwise to the solution, followed by stirring at room temperature for 6 hours. The precipitate formed was filtered and washed with distilled water, and dried in a drying furnace maintained at 100 ± 5 ° C. for 24 hours to use as a catalyst.

<Example 2>

50 g of the catalyst of Example 1 was impregnated with an aqueous solution of silver nitrate (AgNO ₃ ), sufficiently dried in a constant temperature drying furnace at 105 ± 5 ° C., and calcined at 500 ° C. for 4 hours to prepare a catalyst containing silver (Ag, silver oxide). It was.

Experimental Example

30 g of the catalysts prepared in Examples 1 and 2 were added to 100 mL of ethanol, respectively, to prepare a spray solution, and spray the spray solution to include tobacco leaf and tobacco paper in an amount as shown in Table 1 below, followed by drying at 40 ° C. Dried for 1 h. While burning dried tobacco, the mainstream smoke was collected in methanol and analyzed by GC / MS. Based on the results, the nicotine and tar removal rates of the tobacco containing no metal oxide catalyst and the metal oxide catalyst were shown in Table 1 below. Indicated.

Kind of cigarette Nicotine removal rate (%) Tar removal rate (%) A non-catalyst 0 0 Example 1 0.05g 86.8 60.6 0.02 g 81.7 47.3 0.005g 63.2 45.2 0.001g 53.6 38.9 Example 2 0.05g 99.4 67.3 0.02 g 97.3 51.3 0.005g 87.3 87.5 0.001g 81.4 53.6

As shown in Table 1, in Example 1 and Example 2 prepared according to the present invention, it can be seen that the catalyst content is increased as the catalyst content increases. In particular, the catalyst of Example 2 subjected to the secondary coating is It can be seen that the removal efficiency of nicotine and tar is very high when 0.05g per cigarette cigarette is included.

Based on the results of Table 1, the catalyst according to the present invention can be confirmed that it can help the health of smokers and second-hand smokers by effectively removing harmful substances such as nicotine or tar contained in cigarette smoke.

As described above, the present invention can minimize the amount of toxic substances such as dioxins, nicotine, tar, etc. contained in the mainstream smoke and sidestream smoke of tobacco to help maintain the health of smokers and second-hand smoke smokers It is a useful invention to provide a method for preparing a catalyst for removing harmful substances and a catalyst prepared by the method.

In addition, the present invention is a useful invention that provides a method for producing tobacco containing a catalyst capable of minimizing the content of harmful substances in tobacco smoke using the prepared catalyst and the tobacco produced by the production method.

Claims (9)

The process of drying the refractory carrier phase in the impregnating solution obtained by dissolving at least one material selected from the respective metal compounds including platinum, silver, titanium, iron, zinc, vanadium, cerium, manganese or molybdenum is carried out. Method for producing a catalyst for removing harmful substances of tobacco smoke, characterized in that the heat treatment repeated several times. The method of claim 1, wherein the carrier phase of the refractory is first deposited in an impregnation solution obtained by dissolving at least one or more substances selected from the respective metal compounds including titanium, iron, zinc, vanadium, cerium, manganese or molybdenum. A metal oxide-coated carrier phase is obtained by coprecipitation, and the obtained carrier phase is impregnated in an impregnation solution obtained by dissolving silver or platinum secondly, followed by drying and heat treatment at 500 to 600 ° C. Method for preparing a catalyst for removal. The harmfulness of tobacco smoke according to claim 1 or 2, wherein the metal compound is in the form of an organometallic compound, a metal halide, a metal nitrate, or a metal acetate. Method for preparing a catalyst for removing substances. The method according to claim 3, wherein the carrier phase of the refractory is selected from activated alumina, titania, zeolite or cordierite. Prepared by the manufacturing method of claim 1, wherein at least one material selected from platinum, silver, titanium oxide, iron oxide, zinc oxide, vanadium oxide, cerium oxide, manganese oxide or molybdenum oxide is coated on the refractory carrier. Catalyst for removing harmful substances of tobacco smoke. A method for producing tobacco containing a catalyst, characterized in that the catalyst prepared by the method of claim 1 is mixed with an organic binder and spray-coated on the tobacco leaf and cigarette paper. The method of claim 6, wherein the organic binder is ethanol. The method according to claim 6 or 7, wherein the catalyst is 20 to 50 parts by weight based on 100 parts by weight of the spray liquid, characterized in that the catalyst containing tobacco production method. Cigarette containing a catalyst, characterized in that prepared by the manufacturing method of claim 6.