JP2011212098A - Combination of polyphenol and activated carbon - Google Patents

Abstract

An object of the present invention is to obtain a combined body of polyphenols and activated carbon, in which polyphenols are not easily eluted even in water or in an alkaline aqueous solution, and have excellent deodorizing properties.
Non-epimeric catechins comprising (A) 60 to 98% by weight of non-polymer catechins, (B) polyphenols, (C) caffeine and (D) potassium and contained in non-polymer catechins And (C) / (D) = 0.05-2.0 green tea extract, and (1) benzene adsorption performance of 20% to 60% or more (2) The mode of the pore radius is in the range of 5 to 30 mm, and (3) the cumulative pore volume occupied by the pores having a pore radius of 30 mm or less and the pore volume having a pore radius of 50 mm or less. Activated carbon having a volume of 80% or more and (4) a cumulative pore volume occupied by pores having a pore radius of 8 to 20 mm is in a range of 50% to 90% of a cumulative pore volume occupied by pores having a pore radius of 50 mm or less The problem is solved by combining and combining.
[Selection figure] None

Description

  The present invention relates to a combination of polyphenols and activated carbon having excellent deodorizing properties.

  Activated carbon consists mainly of porous carbon that has been subjected to chemical or physical treatment (activation, activation) to increase adsorption efficiency for the purpose of selectively separating, removing, and purifying specific substances. It has been widely used for the purpose of adsorbing and decoloring specific odors. Activated carbon has a high selective adsorptivity to non-polar molecules, and it has been experienced that it cannot exert sufficient effects on the adsorption of malodorous substances that are polar molecules such as ammonia, especially deodorizing effect on ammonia in water There is almost no.

On the other hand, polyphenols represented by catechins contained in green tea extract have antibacterial and bactericidal effects, and have a deodorizing function, but it is difficult to exert those functions in a solid state. , Its range of use and applications were limited.
In order to solve these problems, a composition comprising activated carbon and a plant polyphenol (see, for example, Patent Document 1), a deodorizing agent, and a deodorizing tool (for example, see Patent Document 2) have been proposed. However, screening of activated carbon and polyphenols is not sufficient, and there is a low adsorption performance of polyphenols on activated carbon, and elution of polyphenols from activated carbon, so that the use is limited and a sufficient function cannot be exhibited.

Japanese Patent Application No. 10-116614 Japanese Patent Application No. 7-124469

Until now, activated carbon has been used in the process of producing tea extracts, but most of the liquid phase activated carbon is used, and the purpose of removing impurities and odors other than polyphenols in aqueous solution is the purpose. It was the Lord.
In these steps, a small amount of polyphenols are also adsorbed on the activated carbon. When the activated carbon is dried and then added again to water in an appropriate amount, the polyphenols adsorbed on the activated carbon are eluted. Further, the elution of polyphenols is remarkable in the alkaline aqueous solution.
When trying to use activated carbon and polyphenols with excellent functionality, elution of polyphenols becomes a problem when added to water in anticipation of antibacterial properties simply by mixing ordinary polyphenols and activated carbon. Even when used in a solid form as well as in water, elution of polyphenols from activated carbon becomes a problem due to moisture in the air. Even in industrial application, for example, when adhering to a non-woven fabric, it is dispersed in a solvent such as water and adhering using an adhesive or the like. In addition, with only activated carbon, the effect is not sufficiently observed for some volatile organic compounds and ammonia.
Therefore, the present invention provides a combined product of polyphenols and activated carbon having an excellent deodorizing effect in which polyphenols having excellent functionality and activated carbon are combined, and the polyphenols are not eluted even in water or in an alkaline aqueous solution. The task is to do.

As a result of examining the composition of polyphenols and non-polymer catechins and various activated carbons, the present inventors have found that the following components (A), (B), (C) and (D),
(A) Non-polymer catechins (B) Polyphenols (C) Caffeine (D) Potassium and the components (A), (B), (C) and (D) are the following (A), (B) and (c),
(A) (A) / (B) = 0.61 to 0.99
(B) (C) / (B) = 0.0001 to 0.1
(C) (D) / (B) = 0.0001 to 0.03
The ratio of non-epimeric catechins (E) and epimeric catechins (F) contained in the non-polymer catechins is (E) / (F) = 0.05 to 2.0, A tea extract having a concentration of polymerized catechins of 60.0 to 98.0% by weight; (1) a benzene adsorption performance of 20% to 60% or more; and (2) a mode value of the pore radius of 5%. (3) The cumulative pore volume occupied by pores having a pore radius of 30 mm or less is 80% or more of the cumulative pore volume occupied by pores having a pore radius of 50 mm or less, (4) Polyphenols comprising activated carbon having a cumulative pore volume occupied by pores having a pore radius of 8 to 20 mm and a range of 50% to 90% of a cumulative pore volume occupied by pores having a pore radius of 50 mm or less It has been found that an activated carbon conjugate solves the above problems.

  The combined body of the polyphenols and activated carbon of the present invention is excellent in the deodorizing effect in the polyphenols activated carbon mixture so far, since the polyphenols eluted in water and the alkaline aqueous solution are not eluted from the activated carbon.

Hereinafter, the present invention will be described in detail.
The polyphenols in the present invention are contained in most of the plants that carry out photosynthesis, and are not particularly limited, but flavonoids such as flavones, flavonols, flavanones, isoflavones, anthocyanins, flavanols, other non-flavonoids, And derivatives and polymers thereof.
Specific examples of polyphenols include catechin, epicatechin, gallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate, epigallocatechin gallate, epigallocatechin, tannic acid, gallotannin, ellagitannin, caffeic acid, dihydrocaffeic acid, chlorogen Acid, isochlorogenic acid, gentisic acid, homogentisic acid, gallic acid, ellagic acid, rosmarinic acid, rutin, quercetin, quercetagine, quercetagetin, gosipetin, anthocyanin, leucoanthocyanin, proanthocyanidin, enocyanin, and derivatives, polymers, three-dimensional Examples thereof include one or a mixture of two or more selected from isomers.

  As polyphenols obtained from tea, (+)-catechin, (−)-gallocatechin, (−)-gallocatechin gallate, (−)-epicatechin, (−)-epicatechin gallate, (−)-epigallo There are catechin, (−)-epigallocatechin gallate, free theaflavin, theaflavin monogallate A, theaflavin monogallate B, theaflavin digallate, etc., one or two selected from these derivatives, polymers, and stereoisomers The above mixture is mentioned.

Non-polymer catechins include non-epimeric catechins such as catechin, gallocatechin, catechin gallate and gallocatechin gallate, and epicatechins such as epicatechin, epigallocatechin, epicatechin gallate and epigallocatechin gallate. And is included in polyphenols.
The tea extract in the present invention refers to tea leaves ( Camelia sinensis var. Sinensis , Camellia sinensis var . Assamica , or hybrids thereof) directly or from tea leaves (for example, sencha, Non-fermented tea such as Gyokuro, kabusecha, bancha, roasted green tea, flower tea such as jasmine tea that has been transferred to non-fermented tea, weakly fermented tea such as white tea, semi-fermented tea such as oolong tea, fermented tea, etc. Extracts from hot tea or water-soluble organic solvents extracted from hot tea or water-soluble organic solvents are concentrated and / or dried, and in particular, extracted from unfermented teas such as green tea with hot water or water-soluble solvents The extracted liquid is desirable. Polyphenol-containing materials such as commercially available sunphenon (manufactured by Taiyo Kagaku Co., Ltd.), theafuran (manufactured by ITO EN Co., Ltd.), and polyphenon (manufactured by Mitsui Norin Co., Ltd.) can also be used.

The concentration of the non-polymer catechins in the tea extract used as the raw material for the polyphenol activated carbon conjugate of the present invention is preferably 60.0 to 98.0% by weight, more preferably 70.0 to 95.0% by weight is preferable, and 75.0-90.0% by weight is particularly preferable.
Furthermore, the ratio of (A) non-polymer catechins to (B) polyphenols is preferably (A) / (B) = 0.61 to 0.99, more preferably (A) / (B) = From the viewpoint of the deodorizing effect, (A) / (B) = 0.80 to 0.95 is most preferable.

The ratio of (C) caffeine to (B) polyphenols in the tea extract used as the raw material of the polyphenols activated carbon conjugate of the present invention is (C) / (B) from the viewpoint of the ability of catechins to bind to activated carbon. = 0 to 0.1 is preferable, and (C) / (B) = 0 to 0.08 is more preferable. Furthermore, the ratio of (D) potassium to (B) polyphenols is preferably (D) / (B) = 0 to 0.03, more preferably (D) / from the viewpoint of the binding properties of catechins to activated carbon. (B) = 0 to 0.01.
In order to efficiently bind polyphenols to activated carbon, the ratio of the non-epimeric catechins (E) and the epimeric catechins (F) of the non-polymer catechins is (E) / (F) = 0.05- 2.0 is preferable, more preferably (E) / (F) = 0.05 to 1.0, and most preferably (E) / (F) = 0.05 to 0.8. Range.

The activated carbon used in the present invention is not particularly limited in shape, but may be granular, powdery, slurryy, fibrous, etc., but granular is preferred in terms of handling and binding properties with polyphenols.
The main application of the activated carbon used is not particularly limited to liquid phase or gas phase, but from the standpoint of the binding properties of polyphenols, it is generally used for gas phase such as bad odor gas, odor removal, air purification, etc. Those used as are preferred.
A known method may be used as a method for measuring the benzene adsorption performance of activated carbon. For example, about 10 g of a sample dried at 110 to 120 ° C. for 3 hours and allowed to cool in a desiccator is precisely weighed in a U-shaped tube, and the 20 ° C. In a thermostat, dry air was fed into benzene at 20 ° C at a rate of 180 ml / min. After the weight increase was completed through benzene (partial pressure 7 mmHg) diluted with dry air 10 times, benzene adsorption performance was Is calculated. Benzene adsorption performance (%) = {(Increased weight) / (Sample weight)} × 100 (%).

  The benzene adsorption performance of (1) activated carbon used in the present invention is preferably 20% to 60%, more preferably 30 to 40%. If it is less than 20%, the binding force of the polyphenols to the activated carbon becomes weak, and the polyphenols may be eluted in an alkaline aqueous solution, which is not preferable. If it is 60% or more, the binding force between polyphenols and activated carbon becomes weak. This is because the benzene adsorption performance is an index representing the adsorption performance of the activated carbon and also an index representing the hydrophobicity inside the pores of the activated carbon. Therefore, it is considered that when the benzene adsorption performance of activated carbon is 60% or more, the affinity between the polyphenols and the activated carbon is lowered, and the binding amount of the polyphenols is reduced.

As a method for measuring the pore radius, its mode, and cumulative pore volume, a known method may be used. For example, the pore radius is defined based on a pore distribution curve created by a water vapor adsorption method, and from the obtained pore distribution curve. The pore radius, its mode value, and cumulative pore volume can be determined. The cumulative pore volume occupied by pores having a pore radius of 30 mm or less (hereinafter referred to as V _0-30 ) is obtained, and the cumulative pore volume occupied by pores having a pore radius of 50 mm or less (hereinafter referred to as V ₅₀ ) is obtained. The ratio (%) of V _{0-30 to} V _50, which is the requirement (3) of the activated carbon, can be determined from the values obtained by the following equation. (V _0-30 / V ₅₀ ) × 100. Similarly yield a cumulative pore volume occupied by pores of radius 8～20A (and hereafter _{V 8-20), V 50} from the value of _{V 8-20} and _{V 50,} which is activated carbon requirement (4) The ratio (%) of _V8-20 to can be obtained by the following equation. _{(V 8-20 / V 50) ×} 100.

The activated carbon used in the present invention has the requirements described in (1) to (4), that is, the benzene adsorption performance is 20% to 60%, and the mode value of the pore radius of the activated carbon (hereinafter referred to as R _MAX ) is 5 to The range is 30%, (V _0-30 / V ₅₀ ) × 100 is 80% or more, and (V _8-20 / V ₅₀ ) × 100 is preferably in the range of 50% to 90%, more preferably 60 It is necessary to have all the characteristics (1) to (4) that are in the range of ˜80%. By having these four requirements, the ability to bind to polyphenols is enhanced, the elution of polyphenols from the activated carbon conjugate of polyphenols in an alkaline aqueous solution is extremely reduced, and the ability to deodorize odorous substances, etc. Becomes higher.

Among the activated carbons having the above requirements (1) to (4), (1) benzene adsorption performance is 25% to 40%, and (2) the mode value of the pore radius is in the range of 5 to 25%. And (3) (V _0-30 / V ₅₀ ) × 100 is 85%, and (4) activated carbon whose (V _8-20 / V ₅₀ ) × 100 is in the range of 50% to 85% is polyphenols. This is preferable because the elution of polyphenols is extremely small even in alkaline aqueous solutions, various solvents, and acidic aqueous solutions.
The raw material of the activated carbon is not particularly limited, such as coconut husk, coal, charcoal, etc., but coconut husk is preferable from the viewpoint of the binding power of polyphenols.

Unlike the conventional polyphenols activated carbon mixture, the polyphenols activated carbon conjugate in the present invention refers to those in which the polyphenols are not easily eluted even when the polyphenols activated carbon conjugate is impregnated in an alkaline aqueous solution.
Although it does not specifically limit in order to confirm whether polyphenols elute from activated carbon, it mix | blends so that it may become a density | concentration of 1 weight% in 0.2N sodium hydroxide aqueous solution for 10 minutes. After stirring, the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid is 0.05% by weight or less, preferably 0.01% by weight or less, more preferably 0.005% by weight or less. Can be confirmed.

In the present invention, the treatment for obtaining the combined body of polyphenols and activated carbon is performed by adding polyphenols to water in an amount of 0.1% to 20%, more preferably 1% to 10%, and adjusting the pH of the polyphenols solution to acidic. It is preferable to prepare it. The pH value to be prepared is preferably from 1.0 to 4.0, more preferably from 1.8 to 3.0 from the viewpoint of the reactivity between polyphenols and activated carbon. Although it does not specifically limit about the acid agent used for pH adjustment, Hydrochloric acid is preferable. Thereafter, the same amount of activated carbon as the blended polyphenols is added. Stir or allow to react for several hours.
Thereafter, the conjugate is separated from the mixed solution by a method such as centrifugation, filtration, and sieving, washed and dried.

The drying method may be any known method such as vacuum drying, natural drying, rotary evaporator, drum rotation type, and drying with a rotary coil dryer, and is not particularly limited. What is necessary is just to determine drying time etc. suitably according to the method to be used.
The obtained combined body of polyphenols and activated carbon may be granular, powdered, fibrous or slurry, and the granular combined body may be pulverized into powder.
Examples of the pulverizing method include impact friction pulverizer, centrifugal pulverizer, ball mill (tube mill, compound mill, conical ball mill, rod mill), vibration mill, colloid mill, friction disk mill, jet mill, etc. The pulverizer is preferably used.
As a pulverization method, a ball mill is generally used. However, when a ball mill is used, the balls and the pulverization container are preferably made of non-metal such as alumina or agate in order to avoid mixing metal powder.
The content of polyphenols contained in the polyphenol activated carbon conjugate is in the range of 10 to 30%. Since the content of polyphenols contained in the polyphenol activated carbon conjugate cannot be directly measured, when the polyphenol solution and activated carbon are reacted as described above, the amount of polyphenols contained in the solution before and after the reaction is determined. It can be measured and the content of polyphenols contained in the polyphenol activated carbon conjugate can be determined from the difference in the amount of polyphenols in the solution before and after the reaction as in the following formula. Content (%) of polyphenols contained in the polyphenol activated carbon conjugate = {(TP1−TP2) × V / 100} / [AC + {(TP1−TP2) × V / 100}] × 100
Polyphenol content before reaction (%); TP1
Polyphenol content after reaction (%); TP2
Liquid volume at the time of reaction (ml); V
Activated carbon amount (g); AC
Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

The method for measuring the non-polymer catechins and polyphenols in the tea extract used in this example was as follows.
<Measurement of non-polymer catechins>
The sample was diluted to an appropriate concentration, and the solution was filtered with a filter (0.45 μm). A high-performance liquid chromatograph (model SCL-10AVP) manufactured by Shimadzu Corporation was used, and a Cep-pak C18 column (4.6 mm × 10 mm: Shiseido) was installed and analyzed at a column temperature of 40 ° C. The mobile phase was methanol / water / phosphoric acid = 17/83 / 0.5 solution, the sample injection volume was 10 μL, and the UV detector wavelength was 280 nm.
(+)-Catechin, (−)-epicatechin, (−)-gallocatechin, (−)-catechin gallate, (−)-epicatechin gallate, (−)-gallocatechin gallate, (−) detected here -Content of non-polymer components such as epigallocatechin gallate and (-)-epigallocatechin was added to obtain a non-polymer catechin content.
<Measurement of polyphenols>
The polyphenols content is measured by the iron tartrate method, using ethyl gallate as the standard solution, and calculated as the converted amount of ethyl gallate (existing additive third edition polyphenol content measurement method in tea extract). Dilute the sample to an appropriate concentration, develop 5 mL of the solution with 5 mL of iron tartrate standard solution (100 mg of ferrous sulfate heptahydrate, and 500 mg of sodium and potassium tartrate with distilled water) and use phosphate buffer. Liquid (1 / 15M disodium hydrogen phosphate solution and 1 / 15M sodium dihydrogen phosphate solution adjusted to pH 7.5) was adjusted to pH 25 mL, the absorbance was measured at 540 nm, and ethyl gallate The polyphenol content was determined from the calibration curve obtained by the above method.

Example 1
10 g of green tea extract A having the analytical values described in Table 1 was added to 80 g of ion-exchanged water at 50 ° C. and dissolved by stirring. Then, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon A having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, the product was dried by a rotary coil dryer to obtain 15 g of the polyphenol activated carbon conjugate A of the present invention.
The obtained Conjugate A was blended in a 0.2N aqueous sodium hydroxide solution to a concentration of 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. It was 002% by weight, confirming that it was a conjugate.

Example 2
10 g of the green tea extract B having the analytical values described in Table 1 was added to 80 g of ion-exchanged water at 50 ° C. and dissolved by stirring. Then, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon B having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, the product was dried by a rotary coil dryer to obtain 15 g of the activated carbon conjugate B of polyphenols according to the present invention.
The obtained conjugate B was blended in a 0.2N sodium hydroxide aqueous solution so as to be 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. It was 003 wt%, and it was confirmed to be a conjugate.

Example 3
After adding 10 g of the green tea extract C having the analytical values described in Table 1 to 80 g of ion-exchanged water at 50 ° C. and dissolving by stirring, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon C having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, the product was dried by a rotary coil dryer to obtain 15 g of the activated carbon conjugate C of polyphenols according to the present invention.
The obtained Conjugate C was added to a 0.2N sodium hydroxide aqueous solution so as to be 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. It was 004% by weight, confirming that it was a conjugate.

Comparative Example 1
10 g of the green tea extract a having the analytical values described in Table 1 was added to 80 g of ion-exchanged water at 50 ° C. and dissolved by stirring. Then, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon a having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, it was dried by a rotary coil dryer, and about 15 g of a mixture a of a comparative polyphenol and activated carbon was obtained.
The obtained mixture a was mixed in a 0.2N sodium hydroxide aqueous solution so as to be 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. It was 08% by weight, and elution of polyphenols was confirmed, confirming that it was not a conjugate but a mixture.

Comparative Example 2
10 g of the green tea extract b having the analytical values described in Table 1 was added to 80 g of ion-exchanged water at 50 ° C. and dissolved by stirring, and then the pH was adjusted to 2.0 with 1N hydrochloric acid. 9.8 g of the activated carbon b having the analysis value described was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, it was dried by a rotary coil dryer, and about 15 g of a mixture b of polyphenols and activated carbon as a comparative product was obtained.
The obtained mixture b was mixed in a 0.2N sodium hydroxide aqueous solution so as to be 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. It was 09% by weight, elution of polyphenols was confirmed, and it was confirmed that the mixture was not a conjugate but a mixture.

Comparative Example 3
After adding 10 g of the green tea extract c having the analytical values described in Table 1 to 80 g of ion-exchanged water at 50 ° C. and stirring to dissolve, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon c having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, it was dried by a rotary coil dryer, and about 15 g of a mixture c of polyphenols and activated carbon as a comparative product was obtained.
The obtained mixture c was blended in a 0.2N aqueous sodium hydroxide solution to a concentration of 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. 10% by weight, elution of polyphenols was confirmed, and it was confirmed that the mixture was not a conjugate but a mixture.

Comparative Example 4
After adding 10 g of the green tea extract d having the analytical values described in Table 1 to 80 g of ion-exchanged water at 50 ° C. and stirring to dissolve, the pH was adjusted to 2.0 with 1N hydrochloric acid, and Table 2 was added while stirring. 9.8 g of the activated carbon d having the described analytical value was added and held for 24 hours with stirring. Thereafter, the mixture was sieved and the supernatant was removed. Thereafter, it was dried by a rotary coil dryer, and about 15 g of a mixture d of a comparative polyphenol and activated carbon was obtained.
The obtained mixture d was mixed in a 0.2N sodium hydroxide aqueous solution so as to be 1% by weight and stirred for 10 minutes, and then the content of polyphenols contained in the aqueous solution adjusted to pH 3 with 1N hydrochloric acid was 0.00. 10% by weight, elution of polyphenols was confirmed, and it was confirmed that the mixture was not a conjugate but a mixture.

  The details of the tea extract and activated carbon used in Examples 1 to 3 and Comparative Examples 1 to 4 are shown in Tables 1 and 2.

Test example 1
The present invention product, the comparative product, and the activated carbon single product obtained above were subjected to the deodorization test described below, and the results are shown in Table 3.

<Deodorization test 1: Ammonia deodorization test>
After 2.6 L of air and 50 ml of ammonia gas were put into the sachet and the initial concentration was measured, there were combined A and combined B, combined C, mixed a, mixed b, mixed c, mixed d, 1 g of activated carbon a is added and left at room temperature for 30 minutes. Thereafter, the amount of ammonia in the odor bag was measured using a gas tube detector manufactured by Gastec Corporation. As a result, the initial concentration was 100, and the concentration after 30 minutes was relatively shown. The lower the value, the higher the deodorizing effect.

<Deodorization test 2: Trimethylamine deodorization test>
After 2.6 L of air and 5 ml of trimethylamine gas were measured in the sachet, the initial concentration was measured, and then there were combined A and B, combined C, mixed a, mixed b, mixed c, mixed d, 1 g of activated carbon a is added and left at room temperature for 30 minutes. Thereafter, the amount of trimethylamine in the odor bag was measured using a gas tube detector manufactured by Gastec Corporation. As a result, the initial concentration was 100, and the concentration after 30 minutes was relatively shown. The lower the value, the higher the deodorizing effect.

<Deodorization test 3: Methyl mercaptan deodorization test>
After 2.6 L of air and 0.5 ml of methyl mercaptan gas are measured in the sachet, the initial concentration is measured, and then there are combined A and combined B, combined C, mixed a, mixed b, mixed c and mixed. 1 g of body d and activated carbon a are added and left at room temperature for 30 minutes. Thereafter, the amount of methyl mercaptan in the odor bag was measured using a gas tube detector manufactured by Gastec Corporation. As a result, the initial concentration was 100, and the concentration after 30 minutes was relatively shown. The lower the value, the higher the deodorizing effect.

<Deodorization test 4: Formaldehyde deodorization test>
After 2.6 L of air and 50 ml of formaldehyde gas were placed in the sachet and the initial concentration was measured, there were combined A and B, combined C, mixed a, mixed b, mixed c, mixed d, 1 g of activated carbon a is added and left at room temperature for 30 minutes. Thereafter, the amount of formaldehyde in the odor bag was measured using a gas tube detector manufactured by Gastec Corporation. As a result, the initial concentration was 100, and the concentration after 30 minutes was relatively shown. The lower the value, the higher the deodorizing effect.

<Deodorization test 5: Sensory test>
After 2.6 L of air and 5 ml of trimethylamine gas were measured in the sachet, the initial concentration was measured, and then there were combined A and B, combined C, mixed a, mixed b, mixed c, mixed d, 1 g of activated carbon a is added and left at room temperature for 30 minutes. Ten trained panelists sniffed the odors in the odor bags, digitized according to the following criteria, and evaluated the odor intensity by the average value.
0 point: odorless. There is no odor at all.
1 point: I finally feel odor. I can't tell what odor is.
2 points: Odor is felt. It is possible to determine what odor is.
3 points: It smells quite a bit.
4 points: Strongly smells.
5 points: It smells violently. Strong odor that cannot be tolerated.

  From the results shown in Table 3, it is clear that the combined product of the present invention has a high detergency compared with the mixture of the comparative product and the activated carbon used as the raw material.

  ADVANTAGE OF THE INVENTION According to this invention, in addition to the function which activated carbon has, the conjugate | bonded_body provided with the outstanding deodorizing function which polyphenols have was provided. Since these polyphenols do not elute from activated carbon even in water or alkaline aqueous solution, they have a wide range of applications and an excellent deodorizing effect. Therefore, the present invention can be expected to be used in various fields and greatly contributes to the industry.

Claims (3)

The following components (A), (B), (C) and (D),
(A) Non-polymer catechins (B) Polyphenols (C) Caffeine (D) Potassium and the components (A), (B), (C) and (D) are the following (A), (B) and (c),
(A) (A) / (B) = 0.61 to 0.99
(B) (C) / (B) = 0.0001 to 0.1
(C) (D) / (B) = 0.0001 to 0.03
The ratio of non-epimeric catechins (E) and epimeric catechins (F) contained in the non-polymer catechins is (E) / (F) = 0.05 to 2.0, A tea extract having a concentration of polymerized catechins of 60.0 to 98.0% by weight; (1) a benzene adsorption performance of 20% to 60% or more; and (2) a mode value of the pore radius of 5%. (3) The cumulative pore volume occupied by pores having a pore radius of 30 mm or less is 80% or more of the cumulative pore volume occupied by pores having a pore radius of 50 mm or less, (4) Polyphenols comprising activated carbon having a cumulative pore volume occupied by pores having a pore radius of 8 to 20 mm and a range of 50% to 90% of a cumulative pore volume occupied by pores having a pore radius of 50 mm or less Activated carbon conjugate.   The polyphenol-type activated carbon conjugate according to claim 1 is mixed in a 0.2N aqueous sodium hydroxide solution to a concentration of 1% by weight and stirred for 10 minutes, and then contained in an aqueous solution adjusted to pH 3 with 1N hydrochloric acid. A polyphenols activated carbon conjugate, wherein the content of polyphenols is 0.05% by weight or less.   The tea extract according to claim 1, wherein the tea extract is a green tea extract.