Deodorant containing alum-polyphenol composite, deodorizing method using said deodorant, and method for producing said composite

Abstract

To provide a deodorant containing an alum-polyphenol composite material obtained by reacting an alum component and a polyphenol component included in tea or coffee, and, to provide a deodorizing method using the deodorant and to provide a manufacturing method of the composite material.SOLUTION: A deodorant is provided, containing 0.1 to 20 mass% of an alum component (A) and 30 to 95 mass% of a polyphenol source (B) in an alum-polyphenol composite material, or a deodorant is provided in which the composite material is a composition obtained by reacting the alum component (A) and the polyphenol source (B). A deodorizing method is provided in which the deodorant is added into or contacted with a liquid, a solid or powder.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a deodorizer containing an alum-polyphenol composite, a deodorizing method using the deodorizer, and a method for producing the composite. [Background technology]

[0002] Commercially available deodorizers include those that dissolve deodorizing ingredients in liquid, those that use physical adsorption onto surfaces such as activated carbon, or those that combine both to achieve a long-lasting deodorizing effect. However, taking into consideration the environmental impact, there is a demand for products that use natural materials and can be used repeatedly.

[0003] Polyphenolic components such as flavonoids contained in tea and coffee have antioxidant properties and the ability to break down malodorous substances such as ammonia through the hydroxyl groups they contain, and examples of their use as deodorizing agents have been reported (Patent Documents 1 and 2, etc.).

[0004] Meanwhile, conventionally known inorganic substances with deodorizing effects include metals such as iron and copper, and metal compounds such as titanium oxide and alum (double salts of monovalent and trivalent metal sulfates, such as potassium aluminum sulfate). Alum in particular is used as a deodorant or antiperspirant to prevent the proliferation of alkophilic bacteria, which cause bad odors, by taking advantage of the fact that its aqueous solution is acidic (Patent Documents 3 and 4, etc.).

[0005] In recent years, iron-polyphenol materials have been developed by combining the polyphenols contained in tea and coffee with inorganic divalent iron (Patent Documents 2 and 5, etc.). These materials are expected to be used as disinfectants and preservatives with low environmental impact in the agriculture and food industries, as well as materials for decomposing pollutants in wastewater. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-13475 [Patent Document 2] Japanese Patent Publication No. 2020-156792 [Patent Document 3] Japanese Patent Publication No. 2020-180085 [Patent Document 4] Japanese Patent Application Laid-Open No. 2014-105186 [Patent Document 5] Japanese Patent Application Publication No. 2020-158448 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to provide a deodorizer containing an alum-polyphenol composite obtained by reacting an alum component with a polyphenol component contained in tea, coffee, or the like, to provide a deodorizing method using the deodorizer, and to provide a method for producing the composite. [Means for solving the problem]

[0008] The present invention was achieved as a result of extensive research aimed at solving the above problems, and is summarized as follows.

[0009] 1. Alum-polyphenol composite material, 0.1 to 20 mass% of an alum component (A), A deodorant containing 30 to 95 mass % of a polyphenol source (B).

[0010] 2. A deodorant, wherein the composite material is a composition obtained by reacting an alum component (A) with a polyphenol source (B).

[0011] 3. A deodorant in which the alum component (A) is a double salt or hydrate of a sulfate containing aluminum, iron, potassium, sodium or ammonium.

[0012] 4. A deodorizer wherein the polyphenol source (B) is tea or coffee.

[0013] 5. A deodorizing method comprising adding the deodorizer to or contacting it with a liquid, solid or powder.

[0014] 6. A deodorizing method using the deodorizer to eliminate malodorous components such as acetic acid, butyric acid, ammonia, acetaldehyde, trimethylamine, or methyl mercaptan.

[0015] 7. A step (X) of contacting an aqueous solution or dispersion (A1) of the alum component (A) with a polyphenol source (B) at 20°C to 150°C to obtain a reaction product (P); and A method for producing an alum-polyphenol composite material, comprising: a step (Y) of heating the reaction product (P) to 50°C or higher and drying it to a moisture content of 20% or less within 60 hours.

[0016] 8. The method for producing the alum-polyphenol composite material, wherein the concentration of the alum component (A) in the aqueous solution or dispersion (A1) is 1 to 30 mass %.

[0017] 9. A method for producing an alum-polyphenol composite material, in which step (X) is carried out in a range where the mass ratio of (A1):(B) is 0.1:1 to 10:1.

[0018] 10. A method for producing an alum-polyphenol composite, comprising maintaining the moisture content at 1 to 70% and carrying out step (X).

[0019] 11. A method for producing an alum-polyphenol composite, wherein the contact in step (X) is carried out by spraying the aqueous solution or dispersion (A1) onto the polyphenol source (B). [Effects of the Invention]

[0020] The deodorant of the present invention uses a composite material containing an alum-polyphenol as an active ingredient and has a deodorizing effect against malodors caused by ammonia, trimethylamine, acetaldehyde, methyl mercaptan, acetic acid, butyric acid, etc. Furthermore, a deodorizing method using the deodorant of the present invention can remove malodorous components from gas. Furthermore, the manufacturing method of the present invention allows the alum-polyphenol composite material to be manufactured simply and efficiently. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the preferred embodiments. However, the present invention is not limited to the following embodiments and can be embodied in various forms within the scope of the present invention.

[0022] The "alum-polyphenol composite" in the deodorant of the present invention will now be described. In the present invention, the alum-polyphenol composite is a general term for a composition obtained by mixing alum with polyphenols contained in tea, coffee, etc., or a compound obtained by reacting them.

[0023] [Alum component (A)] The "alum component (A)" in the "alum-polyphenol composite material" of the present invention will be explained. "Alum (alum or alum)" refers to aluminum ions (Al 3+ ), iron ions (Fe 3+ ), chromium (Cr 3+ ) and sodium ions (Na + ), potassium ions (K + ), rubidium (Rb + ) and monovalent metal(I) ions such as ammonium ions (NH4 +) is a general term for double salts with sulfate, including potassium aluminum sulfate dodecahydrate (potassium alum, AlK(SO4)2·12H2O), anhydrous potassium aluminum sulfate (calcined alum, AlK(SO4)2), ammonium aluminum sulfate dodecahydrate (AlNH4(SO4)2·12H2O), sodium aluminum sulfate dodecahydrate (sodium alum, NaAl(SO4)2 / 12H2O), potassium iron(III) sulfate (potassium iron alum, KFe(SO4)2), ammonium iron(III) sulfate (ammonium iron alum, NH4Fe(SO4)2·12H2O), and potassium chromium sulfate dodecahydrate (chrome alum, CrK(SO4)2·12H2O). In the deodorant of the present invention, the alum component is preferably a double salt or hydrate of a sulfate containing aluminum, iron, potassium, sodium or ammonium, and more preferably a hydrate of a double salt of a sulfate containing aluminum or potassium.

[0024] [Polyphenol source (B)] The "polyphenol source (B)" in the "alum-polyphenol composite" of the present invention will now be described. Specific examples of "polyphenols" include flavonoids such as tannins, anthocyanins, catechins, proanthyanidins, isoflavones, and rutin; phenolic acids such as chlorogenic acid; ellagic acid; sesamin, lignans; curcumin; and coumarin. These polyphenol components are found in large amounts in edible plants such as coffee, tea (tea leaves), apples, buckwheat, soybeans, wine, blueberries, grapes, persimmons, bananas, kudzu, strawberries, sesame, turmeric, citrus fruits, woody materials, herbaceous materials, malt, barley, wheat, and hops. In the present invention, raw materials containing these polyphenol components are defined as polyphenol sources. In the deodorant of the present invention, the polyphenol components are preferably those contained in tea or coffee; that is, tea or coffee is preferably the polyphenol source.

[0025] Examples of tea include raw tea leaves, dried tea leaves, fermented tea leaves, extracts obtained by steeping these in water (e.g., green tea, black tea, oolong tea, etc., for drinking), dried powdered extracts, and used tea leaves. Examples of coffee include raw coffee beans, dried coffee beans, roasted coffee beans, roasted and ground coffee beans, extracts obtained by steeping these in water (e.g., coffee for drinking), dried powdered extracts, and coffee grounds. It is highly likely that the polyphenol content of coffee grounds and used tea leaves after consumption has been reduced by extraction. Furthermore, to prevent spoilage during storage, they may require processing (e.g., drying) to control the moisture content within an acceptable range before use in the method of the present invention. Furthermore, the tea leaves and coffee may be non-standard products not intended for consumption.

[0026] The "alum-polyphenol" of the present invention is obtained by reacting the alum or a raw material containing alum with a raw material containing polyphenols (polyphenol source). Specifically, the alum or a raw material containing alum is preferably one that decomposes in water into metal ions such as aluminum and potassium, and sulfate ions, and is dissolved in water to form a solution in which the metal ions can easily come into contact with the polyphenol components. Suitable polyphenol components are those derived from tea or coffee, which may be used or unused, or used tea leaves or coffee grounds from which components have been extracted for beverages and from which a certain amount of polyphenol components have been eluted.

[0027] The present invention demonstrates that an "alum-polyphenol composite" containing 0.1 to 20% by mass of an alum component (A) and 30 to 95% by mass of a polyphenol source (B) can be used as a deodorant. The composite is characterized by being a composition obtained by reacting the alum component (A) with the polyphenol source (B). The present invention also includes a method for producing the composite.

[0028] A deodorizing method using the deodorizer of the present invention will now be described in detail. The deodorizer of the present invention is obtained in the form of a powder of tea, coffee, or the like containing an alum-polyphenol composite as an active ingredient, and can be treated as a normal, safe powder. This powder can be placed in a space where a malodor is occurring or is likely to occur, i.e., by contacting the deodorizer with gas containing malodorous components, deodorizing or preventing the generation of malodor can be achieved. Contact with gas containing malodorous components can be achieved by placing a plate containing the alum-polyphenol composite powder in the space where the gas is present, placing a container with holes containing the powder, or simply placing the powder in a mesh bag. Alternatively, the powder can be scattered in the space, sprinkled on the floor or ground.

[0029] The alum-polyphenol composite of the present invention can optimally exhibit the deodorizing function of alum within the composite. Although the details of the deodorizing function of the alum-polyphenol composite are not yet fully understood, it is speculated that in raw materials containing polyphenols, such as tea or coffee, the alum component, due to the presence of a moderate concentration of surrounding water molecules and polyphenol components, can exhibit an acidic state that allows the alum component to exhibit a deodorizing effect for a longer period of time than conventional alum alone. It is also speculated that the water used during the production of the alum-polyphenol composite may remain even after drying and function as a deodorizing agent. As a result, it is speculated that the acidic environment surrounding the alum prevents the interaction between the substances from impairing the antibacterial effect due to the antioxidant function traditionally possessed by polyphenols such as tea, thereby enabling the alum to exhibit a high deodorizing effect.

[0030] The alum-polyphenol composite of the present invention can be used as a deodorizer by adding the composite to or contacting it with a liquid (e.g., water). The composite has a porous shape that allows it to easily absorb moisture (high humidity) from gas, allowing it to easily absorb moisture. A specific deodorizing method involves, for example, placing the liquid of the present invention in a container such as a dish and impregnating it with an amount of alum-polyphenol composite powder that protrudes above the water surface, preventing the powder from scattering. Alternatively, the alum-polyphenol composite powder may be dispersed in water, applied to a flat surface such as a wall, and then brought into contact with gas containing a malodorous odor. Alternatively, the composite dispersion may be sprayed or dispersed into the gas using a spray or the like.

[0031] Deodorizing methods using the alum-polyphenol composite of the present invention by adding it to other solids or powders include compounding it with a solid or mixing it with a powder. Specifically, methods include drilling a hole in an existing deodorizer such as charcoal and placing the alum-polyphenol composite powder therein, or mixing powdered charcoal with the alum-polyphenol composite powder. It can also be mixed with soil and used with bonsai trees. It can be spread in gardens, fields, or rice paddies to suppress the generation of unpleasant odors in the surrounding area. It can also be compounded with resin or stone to form a plate or other shape, exposing the alum-polyphenol composite components on the surface and contacting it with gases containing unpleasant odor components.

[0032] Specific examples of malodorous components that can be deodorized using the deodorant of the present invention include hydrocarbons such as acetic acid, ethyl acetate, isobutanol, methyl isobutyl ketone, toluene, styrene, and xylene; nitrogen compounds such as ammonia and trimethylamine; aldehydes such as acetaldehyde, propionaldehyde, n-butylaldehyde, isobutyraldehyde, n-valeraldehyde, and isovaleraldehyde; sulfur compounds such as hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide; and fatty acids such as propionic acid, butyric acid, n-valeric acid, and isovaleric acid. The deodorizing method of the present invention has the effect of reducing the concentration of malodorous components in a gas by contacting the alum-polyphenol composite material with an atmosphere in which these malodorous components, either alone or in combination, exist in a vaporized gas or liquid state.

[0033] A specific example of the method for producing the alum-polyphenol composite material of the present invention is shown below. The production conditions, such as temperature and heating time, are appropriately selected depending on the amounts of raw materials, etc. Among the double salts or hydrates of sulfates containing aluminum, iron, potassium, sodium, ammonium, etc., potassium aluminum sulfate dodecahydrate (potassium alum) is used as a specific example of the alum component (A), and tea is used as a specific example of the polyphenol source (B). Potassium alum and water are mixed at an appropriate temperature to prepare an aqueous solution (or dispersion), and tea powder is added to the solution. The mixture is heated to an appropriate temperature, specifically 50°C or higher, preferably 95°C to 110°C, for at least one hour to cause a reaction. This causes the aluminum ions, potassium ions, sulfate ions, or water molecules in the alum to bond with the polyphenols through ionic bonds or van der Waals forces, forming a complex (or complex). If the alum contains trivalent iron, it is reduced to stable divalent iron.

[0034] Depending on the type of alum and the type of polyphenol source, there are various types of atoms and molecular structures of polyphenols. The bonding ratio of alum and polyphenol suitable for a deodorant varies depending on the combination, so the optimal composition ratio and molecular structure of alum-polyphenol are not limited. In the method for producing an alum-polyphenol composite material of the present invention, the composition ratio of the alum component (A) and the polyphenol source (B) when mixed can be set appropriately. For example, the alum component (A) can be mixed in a range of 0.1 to 20% by mass with respect to the polyphenol source (B) contained in dried tea or the like.

[0035] The method for producing an alum-polyphenol composite material of the present invention includes: a step (X) of contacting an aqueous solution or dispersion (A1) of an alum component (A) with a polyphenol source (B) at 20°C to 150°C to obtain a reaction product (P); and a step (Y) of heating the reaction product (P) to 50°C or higher and drying it to a moisture content of 20% or less (mass % of moisture in the entire composite material) within 60 hours. By using an aqueous solution or dispersion (A1) of the alum component (A), the labor required for handling powder can be reduced, and the preparation can be carried out simply and in a short time with less energy.

[0036] [Aqueous solution or dispersion (A1)] The aqueous solution or dispersion (A1) used in the method for producing an alum-polyphenol composite material of the present invention (hereinafter simply referred to as the "production method") will now be described. In the present invention, the alum component (A) is prepared as an aqueous solution or dispersion (A1). The alum component (A) is water-soluble, but its solubility in water varies with temperature. Therefore, a dispersion in which an insoluble alum component (A) is dispersed in a solvent (water) may also be used. The insoluble component can be dissolved in water upon heating during contact with the polyphenol source (B). The aqueous solution or dispersion (A1) is usually prepared by adding the alum component (A) to water or by adding water to the alum component (A) and stirring until homogeneous. If necessary, an auxiliary agent such as a surfactant may be added.

[0037] In the production method of the present invention, the concentration of the alum component (A) in the aqueous solution or dispersion (A1) is not particularly limited, but is preferably 1 to 30 mass %, more preferably 3 to 20 mass %, and even more preferably 5 to 15 mass %.

[0038] The water used in the production method of the present invention is not particularly limited and may be ordinary water, such as well water, river or lake water, seawater, tap water, agricultural water, industrial water, deionized water, distilled water, etc. As long as it does not interfere with the advantageous effects of the present invention, the water may contain pH buffers, salts (NaCl, KCl, etc.), alcohols (ethanol, etc.), sugars, acids, alkalis, etc.

[0039] In the production method of the present invention, the method for mixing the alum component (A) with water is not particularly limited, and may be a conventional mixing method, for example, using a manual or automatic mixer, stirring tank, vortex, shaker, etc. The temperature during mixing may be within a temperature range in which water is in a liquid state (e.g., 1 to 100°C), or may be around room temperature (e.g., 10 to 40°C).

[0040] [Process X] In the production method of the present invention, the aqueous solution or dispersion (A1) can be contacted with the polyphenol source (B) by conventional means. For example, the polyphenol source (B) can be added to the aqueous solution or dispersion (A1), or the aqueous solution or dispersion (A1) can be poured onto the polyphenol source (B). Taking advantage of the liquid nature of the aqueous solution or dispersion (A1), the contact in step (X) can be carried out by sprinkling or spraying the aqueous solution or dispersion (A1) onto the polyphenol source (B). Spraying the aqueous solution or dispersion (A1) onto the polyphenol source (B) is preferred because it allows for a more compact apparatus and reduces the amount of water used.

[0041] In the production method of the present invention, known apparatuses can be used to produce the alum-polyphenol composite material. The vessel is not limited as long as it can uniformly mix and stir the alum raw material, polyphenol source, and water. The reaction vessel may be made of glass, iron, or resin, but heat resistance for heating and drying is preferred. Resistance to acidic and basic solutions is also preferred. Examples of apparatuses for heating the raw materials and reaction product (P) during reaction and drying include dryers with temperature control, and those with a hot air circulation function, rotation mechanism, and forced exhaust mechanism for uniform drying. The dryer may be a batch-type dryer in which the product is added and removed as needed, or a continuous-type dryer in which the product passes through the dryer for a predetermined period of time.

[0042] In the production method of the present invention, the mass ratio of the aqueous solution or dispersion (A1) to the polyphenol source (B), i.e., the mass ratio of (A1):(B), is preferably 0.1:1 to 10:1, more preferably 0.2:1 to 7:1, and even more preferably 0.5:1 to 5:1.

[0043] In step (X) of the production method of the present invention, it is important to uniformly mix the alum compound (A) and the polyphenol source (B) and allow the particles or molecules of each component to come into contact or react uniformly. Therefore, it is preferable to maintain a certain moisture content or higher during step (X). The moisture content is preferably in the range of 1 to 70%, more preferably 3% or higher, and even more preferably 5% or higher. It is also more preferably 60% or lower, and even more preferably 50% or lower. To maintain moisture, the system may be sealed or sealed, or moisture lost during the reaction may be replenished as needed. Maintaining a certain moisture content has the effect of preventing powder scattering. Furthermore, leaving a certain concentration of moisture in the alum-polyphenol complex after production is important for maintaining the acidic properties of alum in aqueous solution on the particle surface of the complex and maintaining and improving the deodorizing effect.

[0044] In step (X) of the production method of the present invention, the temperature at which the alum compound (A) and the polyphenol source (B) are brought into contact with each other is in the range of 20° C. to 150° C., preferably 50° C. to 120° C., and more preferably 80° C. to 110° C. The temperature may be constant throughout step (X) or may be changed over time.

[0045] [Reaction product (P)] The reaction product (P) obtained by the above step (X) is a composite material containing the alum component (A) and the polyphenol component (B) at a certain concentration or more. This can be confirmed by subjecting the product to a pH stability test.

[0046] [Process (Y)] In the production method of the present invention, step (Y) is a step of drying the reaction product (P). Step (Y) may be carried out consecutively to step (X), i.e., in this production method, the reaction product (P) is not isolated but is instead transferred from step (X) to step (Y). Step (Y) may also be carried out in parallel with step (X), for example, in this production method, drying is carried out simultaneously with the progress of the reaction by precisely controlling the moisture and temperature.

[0047] In step (Y) of the production method of the present invention, the temperature at which the reaction product (P) is dried is 50° C. or higher, preferably 80° C. or higher, and more preferably 90° C. or higher. The drying temperature is preferably 200° C. or lower, and more preferably 120° C. or lower. The drying temperature is not limited as long as it can remove moisture to a certain concentration, and natural drying at room temperature is also acceptable.

[0048] In step (Y) of the production method of the present invention, the time required to dry the reaction product (P) to a moisture content of 20% or less is within 60 hours. The drying time is preferably within 48 hours, and more preferably within 24 hours. The shortest drying time is the time required to reduce the moisture content of the reaction product (P) to 20% or less, and varies depending on various factors such as the amount of the reaction product (P), the initial moisture content, and the capacity of the drying means. The moisture content can be easily measured using a commercially available moisture meter. Alternatively, if the majority of the volatile components are water, it can be easily measured by weighing the product before and after drying. The moisture content of the alum-polyphenol composite after drying is preferably 1 to 15% in order to exert its deodorant effect, and a lower moisture content is preferable for storage, with 1 to 10% being more preferred.

[0049] In the manufacturing method of the present invention, the alum-polyphenol composite sample after the drying step (Y) may be subjected to purification, pulverization, sieving, support treatment on a carrier such as silica sand, tableting, etc. using known devices and methods, and other post-treatments may also be performed, including but not limited to these.

[0050] The polyphenol content of the alum-polyphenol composite material of the present invention can be analyzed by known methods, such as the Folin-Denis method. The polyphenol source used in the production can also be analyzed to determine changes in the polyphenol content before and after production. The polyphenol content of the alum-polyphenol composite material of the present invention is preferably 0.1 to 20% by mass.

[0051] The polyphenol content of tea and other polyphenol sources is a constant percentage of the total raw tea sample. Therefore, the alum-polyphenol composite of the present invention is obtained in the form of a composite containing the "alum-polyphenol composite" and components derived from other polyphenol sources (e.g., tea). For example, if 5% by mass of the alum-tea polyphenol composite produced is alum-tea polyphenols, the remaining 95% may be components other than tea-derived polyphenols. The composite of the present invention exhibits a deodorizing effect superior to that of conventional products due to the combined effects of alum, polyphenol components, alum-polyphenol composite components, and components of polyphenol sources that do not contain large amounts of polyphenols. Deodorizers containing the alum-polyphenol composite of the present invention can contain other components mixed in as long as their effectiveness as a deodorizer is not affected. Therefore, they may be mixed with a carrier such as silica sand, soil, or wood chips in a post-production process.

[0052] The alum-polyphenol composite material of the present invention can be used for various purposes, not only as a deodorizer, but also by utilizing and developing its effect of sterilizing malodorous components. Specifically, by processing it into powder, granules, concentrated liquid, or other forms commonly used in the agricultural and horticultural fields, it can be used as a long-term preservative for plant cultivation, a water preservative, an anti-pollution agent, an agent for preventing contaminated soil, etc. [Example]

[0053] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples.

[0054] [Production Example 1] The alum-polyphenol complex samples were produced as follows: The moisture content (mass%) of each sample was measured using a moisture meter (Kett Electric Laboratory, infrared moisture meter, model FD-220).

[0055] <Alum-Tea Manufacturing> A stainless steel tray was filled with 100 g of ion-exchanged water, and 6 g of potassium aluminum sulfate·12-water (AlK(SO4)2·12H2O) (potassium alum) (Fujifilm Wako Pure Chemical Industries, Ltd.) was added and dissolved. 50 g of tea (Dried Green Tea, Ichibishi Tea Co., Ltd., Product Name: "Tokujo Sencha Densho Cha Meisui," Leaf Length: 1-7 mm, Moisture Content: 3.9%) was added as a polyphenol source to the solution. The solution was then stirred, the tray was covered with an aluminum foil lid, and the mixture was heated for 1 hour in a dryer (AS ONE Corporation, Constant Temperature Dryer, Model: DOV-300) at 100°C. After heating, the aluminum foil lid was removed and the mixture was dried for 1 hour in the dryer at 100°C. The dried mixture was then allowed to cool to room temperature, resulting in the "Alum-Tea" sample. Table 1 shows the mixing ratio of the raw materials for each sample, the moisture content before heating (calculated), and the moisture content (mass%) of the alum-tea sample after drying, measured with a moisture meter.

[0056] [Production Example 2] <Alum-Coffee Manufacturing> An alum-polyphenol complex was produced in the same manner as in Production Example 1, except that tea as the polyphenol source in Production Example 1 was replaced with coffee (ground coffee beans (manufactured by Ajinomoto AGF Inc., particle size: 0.5 to 3 mm, moisture content: 5.2%) before use). This was designated as the "alum-coffee" sample. The results are shown in Table 1.

[0057] [Polyphenol content measurement by the Folin-Denis method] The amount of polyphenols contained in the alum-polyphenol composites obtained in Production Examples 1 and 2 (polyphenol concentration (mass%) in the entire composite) was analyzed by the Folin-Denis method described below. The results are summarized in Table 1. The polyphenol concentrations in tea and coffee, which are the polyphenol sources of the raw materials, were as follows: Tea: 10.6%, coffee: 8.0%. (1) Reagents Folin-Denis Reagent: 25g sodium tungstate, 5g phosphomolybdic acid, 12.5mL phosphoric acid, 1L water Mix 88 mL and boil for 2 hours, then add water to make 1000 mL. Sodium carbonate solution: Dissolve 10 g of sodium carbonate in 100 mL of water. (2) Sample preparation Add 90 mL of hot water (around 95°C) to 1 g of the measurement sample and stir for 1 hour to extract. Transfer to a 100 mL volumetric flask and add water to the volume. This solution will be used for color development. (3) Preparation of a calibration curve The standard solution used is ethyl gallate for tea and chlorogenic acid for coffee. Place 0, 0.4, 0.8, 1.2, and 1.6 mL of the 100 ppm standard solution into five 20 mL volumetric flasks, and add 5 mL of Folin-Denis reagent to each. After three minutes, add 5 mL of sodium carbonate solution. Dilute to a final volume of 20 mL with pure water. After 60 minutes, remove the supernatant and measure the absorbance at 700 nm. (4)Analysis operations Place an arbitrary amount of sample (e.g., 0.1 mL) into a 20 mL volumetric flask. Add 5 mL of Folin-Denis reagent. After 3 minutes, add 5 mL of sodium carbonate solution. Dilute to a final volume of 20 mL with pure water. After 60 minutes, remove the supernatant and measure the absorbance at 700 nm.

[0058] [Table 1]

[0059] [Example 1-1, Example 1-2, Comparative Examples 1-1 to 1-4, Reference Example 1] To confirm the deodorizing effect of alum-tea and alum-coffee on malodorous components, deodorizing tests were conducted on various malodorous components using the alum-polyphenol composites produced using tea or coffee, as produced in Production Example 1 or Production Example 2. As comparative examples, deodorizing tests were also conducted using the following tea and coffee. Furthermore, as Reference Example 1, a deodorizing test was conducted on an iron-polyphenol composite (polyphenol source: coffee) (produced by the method of Patent Document 5) (hereinafter abbreviated as "iron-coffee") in the same manner as in the Examples. The experimental procedure is as follows. Petri dishes and test containers (5L Tedlar® Bags (Tedlar®: registered trademark of DuPont), manufactured by AS ONE Corporation) for the number of samples listed below were prepared, and the samples listed below were each placed in a Petri dish (made of glass, outer diameter 90 mm x height 15 mm), which was then placed inside the test container and sealed. (Sample in test container) Example 1-1: Alum-tea composite 1g Example 1-2: Alum-coffee composite 1g Comparative Example 1-1: No sample (nothing placed in the test container) Comparative Example 1-2: Tea (same as the raw material for tea in Production Example 1, before use) 1 g Comparative Example 1-3: Coffee (same as the raw material for coffee in Production Example 2, before use) 1g Comparative Example 1-4: Potassium alum (same as that used as a raw material in Production Example 1) 1 g Example 1: Iron - Coffee 1g (The same method as in [Example 5] described in paragraphs

[0046] to

[0049] of Patent Document 5 was used.) Using 354g of iron(III) chloride, 2700g of coffee and 7000g of water as ingredients, Heated at 100℃ for 24 hours and dried at 95℃ for 48 hours (moisture content: 6.7%, polyphenol content: 5.2%).

[0060] Five mL of ammonia gas was drawn into a 50 mL syringe from a reagent container filled with ammonia gas (human urine odor) (manufactured by Kanto Chemical Co., Inc.) as a malodor component, and injected into each of the above test containers through a tube connected to a resin pipe. Furthermore, 100 mL of air drawn into a 100 mL syringe was injected into each test container six times (total of 600 mL), and the tube was folded and sealed with a clip. The test containers of the above Examples 1-1, 1-2, and Comparative Examples 1-1 to 1-4 were filled with the same concentration of malodor component gas. The time when the malodorous components and air were injected was set as test time 0, and the gas concentration of each sample at time 0 was set as the value of Comparative Example 1-1 (no sample). The change in the concentration of the malodorous component (ammonia) over time (0 to 60 minutes) in each test container was measured using a detector tube gas measuring device (Gastec Corporation, gas sampler (model: GV-100 type), gas detector tube (model: ammonia 3M)). The results are summarized in Table 2.

[0061] [Table 2]

[0062] [Example 2-1, Example 2-2, Comparative Examples 2-1 to 2-4, Reference Example 2] The deodorizing effect on each of the following malodorous components was tested in the same manner as in Examples 1-1 and 1-2, except that the ammonia in Example 1 was replaced with acetic acid (vinegar, sweat odor) (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) as the malodorous component, and the acetic acid concentration was measured using a gas detector tube (model: Acetic Acid 81). The results are summarized in Table 3. (Sample in test container) Example 2-1: Alum-tea composite 1g Example 2-2: Alum-coffee composite 1g Comparative Example 2-1: No sample (nothing placed in the test container) Comparative Example 2-2: Tea (same as the raw material for tea in Production Example 1, before use) 1 g Comparative Example 2-3: Coffee (same as the raw material for coffee in Production Example 2, before use) 1g Comparative Example 2-4: Potassium alum (same as Comparative Example 1-4) 1g Reference Example 2: Iron - Coffee (same as Reference Example 1) 1g

[0063] [Table 3]

[0064] [Example 3-1, Example 3-2, Comparative Examples 3-1 to 3-4, Reference Example 3] The deodorizing effect on each of the following malodorous components was tested in the same manner as in Examples 1-1 and 1-2, except that the ammonia in Example 1 was replaced with acetaldehyde (which has a pungent, grassy smell) (manufactured by Kanto Chemical Co., Ltd.) as the malodorous component, and the acetaldehyde concentration was measured using a gas detector tube (type: Acetaldehyde 92). The results are summarized in Table 4. (Sample in test container) Example 3-1: Alum-tea composite 1g Example 3-2: Alum-coffee composite 1g Comparative Example 3-1: No sample (nothing placed in the test container) Comparative Example 3-2: Dried tea (same as the tea raw material in Production Example 1, before use) 1g Comparative Example 3-3: Coffee (same as the coffee raw material in Production Example 2, before use) 1g Comparative Example 3-4: Potassium alum (potassium aluminum sulfate 12-hydrate) 1g Reference Example 3: Iron - Coffee (same as Reference Example 1) 1g

[0065] [Table 4]

[0066] The above results confirmed that the alum-polyphenol composite produced using tea or coffee as a polyphenol source reduced the concentration of malodorous components over time, demonstrating its deodorizing effect. It was confirmed that the alum-polyphenol composite of the present invention had the same or better deodorizing effect as tea or coffee alone. It was also confirmed that the alum-polyphenol composite had the same or better deodorizing effect as the same amount of alum. As a reference example, it was confirmed that the alum-polyphenol composite had the same or better deodorizing effect as a deodorizer using a conventional iron-polyphenol (coffee) composite. This suggests that an even better deodorizer can be obtained by combining an alum-polyphenol composite with an iron-polyphenol composite. [Industrial Applicability]

[0067] The deodorizer containing the alum-polyphenol composite of the present invention has an excellent deodorizing effect against malodorous components, and by using the deodorizer of the present invention, a deodorizing method can be provided that can effectively remove malodorous components from gas. Furthermore, the method for producing the alum-polyphenol composite of the present invention makes it possible to efficiently produce composite materials with bactericidal properties. Furthermore, the alum-polyphenol composite of the present invention can be used in horticulture, as a preservative for cultivated plants, as an agent for preventing water pollution, and as an agent for preventing polluted soil.

Claims

1. Alum-polyphenol composite material, 0.1 to 20 mass% of an alum component (A); A deodorant comprising: 30 to 95% by mass of a polyphenol source (B); the composite material is a composition obtained by reacting an alum component (A) with a polyphenol source (B), The alum component (A) is potassium aluminum sulfate·12-hydrate (AlK(SO 4 ) 2 ·12H 2 O) (potassium alum), the polyphenol source (B) is tea having a tea leaf length of 1 to 7 mm or coffee having a particle size of 0.5 to 3 mm; The polyphenol content of the tea or coffee in the composite material is 0.1 to 20% by mass, as measured by the Folin-Denis method using ethyl gallate or chlorogenic acid as a standard solution; The deodorizer is a composite material containing, as the polyphenol source (B), a component derived from tea or coffee containing a polyphenol component and a component of tea leaves or coffee grounds containing no polyphenols from which the polyphenol component has been eluted.

2. A method for deodorizing, which comprises adding the deodorant according to claim 1 to or contacting it with a liquid, solid or powder.

3. The deodorizing method according to claim 2, wherein the deodorizer is used to deodorize malodorous components such as acetic acid, ammonia, or acetaldehyde.

4. A step (X) of contacting an aqueous solution or dispersion (A1) of the alum component (A) with a polyphenol source (B) at 100°C to 150°C to obtain a reaction product (P); and 2. The method for producing an alum-polyphenol composite material according to claim 1, further comprising a step (Y) of heating the reaction product (P) to 90° C. or higher and drying it to a moisture content of 20% or less within 60 hours.

5. 5. The method for producing an alum-polyphenol composite material according to claim 4, wherein the concentration of the alum component (A) in the aqueous solution or dispersion (A1) is 1 to 30% by mass.

6. 5. The method for producing an alum-polyphenol composite material according to claim 4, wherein step (X) is carried out in a range of a mass ratio of (A1):(B) of 0.1:1 to 10:

1.

7. 5. The method for producing an alum-polyphenol composite material according to claim 4, wherein the water content is maintained at 1 to 70% while the step (X) is carried out.

8. 5. The method for producing an alum-polyphenol composite material according to claim 4, wherein the contact in step (X) is carried out by spraying the aqueous solution or dispersion (A1) onto the polyphenol source (B).

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