Deodorant

Abstract

To provide a chemical agent that rapidly captures aldehydes and carboxylic acids even in the neutral range near pH = 7.SOLUTION: The problem is solved by using a deodorant agent that contains carboxy group-containing O-substituted monohydroxylamine or chemically acceptable salt and amine thereof for the aldehydes and the carboxylic acids.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a deodorant. [Background technology]

[0002] Aldehydes, such as acetaldehyde and formaldehyde, are typical odorants in the living environment. Because their odor threshold is extremely low, even low concentrations can cause unpleasant odors. These aldehydes are generated indoors and in automobiles from synthetic resins, plywood, cigarette smoke, and other sources, and are known to cause sick building syndrome and sick car syndrome. These aldehydes are also suspected of being carcinogenic, posing a health risk to humans if they are exposed to them on a daily basis. Therefore, the Ministry of Health, Labour and Welfare has set indoor concentration guidelines of 0.03 ppm or less for acetaldehyde and 0.08 ppm or less for formaldehyde. Therefore, a means of rapidly and sustainably removing aldehydes is needed.

[0003] Lower aldehydes such as acetaldehyde and formaldehyde have low boiling points, and therefore cannot be captured efficiently by inorganic porous materials such as silica gel and activated carbon, which are commonly used as deodorants. Therefore, methods for capturing aldehydes by chemically reacting the aldehydes with deodorants made of hydrazine derivatives, amines, amino acids, urea derivatives, or the like have been disclosed (see, for example, Patent Documents 1 to 3).

[0004] However, the methods described in these patent documents have problems such as insufficient capture efficiency, the deodorizer itself becoming an odor source, or re-releasing aldehydes over time even after capturing them once. Furthermore, when the deodorizers described in these patent documents are used in homes or automobiles for the purpose of preventing sick house syndrome or sick car syndrome, these places become hot in the summer, etc., and this causes a problem in that their performance deteriorates.

[0005] Furthermore, when deodorants are used in automobile interior materials, the acidity or basicity of the deodorant can cause problems such as corrosion of metals used in the product or manufacturing process.

[0006] Furthermore, aldehydes are easily oxidized to carboxylic acids in the air, and factory exhaust gases containing aldehydes may also contain carboxylic acids produced by the oxidation of aldehydes. In such cases, since carboxylic acids are also strong odorants, they must be deodorized together with the aldehydes. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 4-358536 [Patent Document 2] Japanese Patent Application Publication No. 11-4879 [Patent Document 3] JP 2012-120708 A Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in view of the above-mentioned background art, and an object of the present invention is to provide a deodorant that quickly captures aldehydes and carboxylic acids even in a neutral range around pH=7. [Means for solving the problem]

[0009] As a result of extensive research to solve the above problems, the present inventors have found that a deodorant containing a specific carboxyl group-containing O-substituted monohydroxylamine or a chemically acceptable salt thereof, and an amine, can quickly capture aldehydes and carboxylic acids even in a neutral range around pH 7, thereby completing the present invention.

[0010] That is, the present invention has the following gist.

[0011] [1] A deodorant characterized by comprising a carboxyl group-containing O-substituted monohydroxylamine or a chemically acceptable salt thereof, and an amine.

[0012] [2] The deodorant according to the above [1], wherein the carboxyl group-containing O-substituted monohydroxylamine is a compound represented by the following general formula (1):

[0013] [ka]

[0014] (In the formula, R represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, or an arylalkyl group having 7 to 15 carbon atoms. n represents an integer of 1 to 6. Multiple Rs may be the same or different.) [3] The deodorant according to the above [2], characterized in that in general formula (1), R is any one of a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a benzyl group, and a phenyl group.

[0015] [4] The deodorant according to any one of [1] to [3] above, wherein the amine is one or more selected from the group consisting of polyethyleneimine, diethanolamine, triethanolamine, trishydroxymethylaminomethane, ethylenediamine-N,N,N',N'-tetraethanol, piperazine, 1,4-piperazinediethanol, 1-(2,3-dihydroxypropyl)piperazine, and 2-hydroxymethyltriethylenediamine.

[0016] [5] The deodorant according to any one of [1] to [4] above, further comprising a solvent, the pH of which is in the range of 5 to 9.

[0017] [6] A deodorizing method using the deodorizer described in any one of [1] to [5] above to remove odorous substances.

[0018] [7] The deodorizing method according to [6] above, wherein the odorous substance is an aldehyde.

[0019] [8] The deodorizing method according to [6] above, wherein the odorous substance is a carboxylic acid. [Effects of the Invention]

[0020] The deodorant of the present invention quickly and continuously captures aldehydes and carboxylic acids, thereby reducing odors caused by aldehydes and carboxylic acids and improving the human living environment. DETAILED DESCRIPTION OF THE INVENTION

[0021] The deodorant of the present invention is characterized by containing a carboxyl group-containing O-substituted monohydroxylamine or a chemically acceptable salt thereof, and an amine.

[0022] In the carboxyl group-containing O-substituted monohydroxylamine represented by the general formula (1), R represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, or an arylalkyl group having 7 to 15 carbon atoms. n represents an integer of 1 to 6. Multiple Rs may be the same or different.

[0023] The alkyl group having 1 to 18 carbon atoms may be a linear, branched, or cyclic alkyl group, and is not particularly limited. Examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group (cetyl group), a heptadecyl group, an octadecyl group (stearyl group), an oleyl group, an elaidyl group, an isopropyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a 3-methylbutyl group, a 2,2-dimethylpropyl group, a 1,1-dimethylpropyl group, a 2-ethylhexyl group, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclononyl group, and a cyclodecyl group.

[0024] The aryl group having 6 to 14 carbon atoms is not particularly limited, but examples thereof include a phenyl group, a naphthyl group, an anthryl group, a tolyl group, a xylyl group, a cumenyl group, a vinylphenyl group, a biphenylyl group, and a phenanthryl group.

[0025] The arylalkyl group having 7 to 15 carbon atoms is not particularly limited, but examples thereof include a benzyl group, a phenylethyl group, a phenylpropyl group, a naphthylmethyl group, an anthrylmethyl group, a tolylmethyl group, a xylylmethyl group, a cumenylmethyl group, a vinylphenylmethyl group, a biphenylylmethyl group, and a phenanthrylmethyl group.

[0026] Among these, carboxyl group-containing O-substituted monohydroxylamines in which R in general formula (1) is any one of a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a benzyl group, and a phenyl group are particularly preferred.

[0027] The hydroxylamino groups of the carboxyl group-containing O-substituted monohydroxylamine may be partially or entirely in the form of a chemically acceptable salt with an inorganic or organic acid. The type of salt is not particularly limited, but examples include inorganic acid salts such as hydrochloride, hydrobromide, perchlorate, silicate, tetrafluoroborate, hexafluorophosphate, sulfate, nitrate, and phosphate, and organic acid salts such as acetate, citrate, fumarate, maleate, trifluoromethanesulfonate, trifluoroacetate, benzoate, and tosylate. Inorganic acid salts are preferred because they are inexpensive, and hydrochloride is more preferred.

[0028] The carboxy group of the above carboxy group-containing O-substituted monohydroxylamine may form an intramolecular salt with the hydroxylamino group in the molecule.

[0029] The amine contained in the deodorant of the present invention is not particularly limited, but examples thereof include polyethyleneimine, ethanolamine, diethanolamine, triethanolamine, trishydroxymethylaminomethane, ethylenediamine, diethylenetriamine, triethylenediamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, ethylenediamine-N,N,N',N'-tetraethanol, 1,4-piperazinediethanol, 1-(2,3-dihydroxypropyl)piperazine, 2-hydroxymethyltriethylenediamine, piperazine, and N-(2-aminoethyl)piperazine.

[0030] From the viewpoint that it is preferable that the deodorant itself has a low odor, among the above-mentioned amines, high-boiling amines such as polyamines such as polyethyleneimine, and hydroxy group-containing amines such as diethanolamine, triethanolamine, trishydroxymethylaminomethane, ethylenediamine-N,N,N',N'-tetraethanol, 1,4-piperazinediethanol, 1-(2,3-dihydroxypropyl)piperazine, and 2-hydroxymethyltriethylenediamine are particularly preferred.

[0031] Polyethyleneimine has a tendency to have a lower odor and be less harmful to the human body as the molecular weight increases, so polyethyleneimine with a molecular weight of 10,000 or more is preferred.

[0032] The deodorant of the present invention can be used in any form depending on the purpose and application. For example, the carboxyl group-containing O-substituted monohydroxylamine or its chemically acceptable salt and amine (hereinafter referred to as "carboxyl group-containing O-substituted monohydroxylamine and amine") can be dissolved in any solvent and used as a liquid deodorant, or the carboxyl group-containing O-substituted monohydroxylamine and amine or the liquid deodorant can be supported on any carrier and used as a solid deodorant.

[0033] The amount of the carboxyl group-containing O-substituted monohydroxylamine and the amine dissolved in the solvent when preparing the liquid deodorant of the present invention can be adjusted as desired depending on the purpose and is not particularly limited, but is preferably in the range of 0.01 to 30% by weight, more preferably in the range of 0.1 to 10% by weight.

[0034] The solvent for dissolving the carboxyl group-containing O-substituted monohydroxylamine and the amine when preparing the liquid deodorant of the present invention is not particularly limited, and examples thereof include water, methanol, ethanol, toluene, etc. Among these, water is particularly preferred because it is inexpensive and harmless to the human body.

[0035] The pH of the liquid deodorant is preferably in the range of 5 to 9 in order to avoid corrosion of the products in which it is used and the metals used in the manufacturing process thereof.

[0036] The weight ratio of the carboxyl group-containing O-substituted monohydroxylamine to the amine in the deodorant of the present invention is preferably such that the pH of the liquid deodorant falls within the range of 5 to 9. For example, when the carboxyl group-containing O-substituted monohydroxylamine is aminooxyacetic acid and the amine is polyethyleneimine (amine value = 18 mmol / g), the weight ratio of polyethyleneimine to 100 parts by weight of aminooxyacetic acid is generally within the range of 30 to 170 parts by weight.

[0037] When preparing the solid deodorant of the present invention, the carrier for supporting the carboxyl group-containing O-substituted monohydroxylamine and amine can be used without any particular limitation as long as it is insoluble in water. For example, polymeric carriers include styrene polymers such as polystyrene and cross-linked polystyrene, polyolefins such as polyethylene and polypropylene, poly(halogenated olefins) such as polyvinyl chloride and polytetrafluoroethylene, nitrile polymers such as polyacrylonitrile, (meth)acrylic polymers such as polymethyl methacrylate and polyethyl acrylate, and high-molecular-weight polysaccharides such as cellulose, agarose, and dextran. Inorganic carriers include activated carbon, silica gel, diatomaceous earth, hydroxyapatite, alumina, titanium oxide, magnesia, and polysiloxane.

[0038] Here, the cross-linked polystyrene is a compound mainly composed of a cross-linked copolymer of a monovinyl aromatic compound such as styrene, vinyltoluene, vinylxylene, or vinylnaphthalene with a polyvinyl aromatic compound such as divinylbenzene, divinyltoluene, divinylxylene, divinylnaphthalene, trivinylbenzene, bisvinyldiphenyl, or bisvinylphenylethane, and these copolymers may be copolymerized with a methacrylic acid ester such as glycerol methacrylate or ethylene glycol dimethacrylate.

[0039] The shape of the carrier used in preparing the solid deodorant of the present invention is not particularly limited, and for example, shapes generally used as separation substrates such as spherical (e.g., spherical particles), granular, fibrous, granular, monolith column, hollow fiber, membrane (e.g., flat membrane), etc. can be used, and among these, spherical, membrane, granular, granular, or fibrous shapes are preferred. Spherical, granular, or granular carriers are particularly preferably used because the volume used can be freely set when used in a column method or a batch method.

[0040] The particle size of the spherical, granular, or particulate carrier is usually in the range of 1 μm to 10 mm in average particle size, preferably in the range of 2 μm to 1 mm.

[0041] The carrier used in preparing the solid deodorant of the present invention may be porous or non-porous. The average pore size of the porous carrier is usually 1 nm to 1 μm, but is preferably in the range of 1 nm to 300 nm in terms of deodorizing speed.

[0042] The method for preparing the solid deodorant of the present invention is not particularly limited, but examples thereof include a method in which the liquid deodorant of the present invention or the carboxy group-containing O-substituted monohydroxylamine and the amine are physically adsorbed onto a carrier to be immobilized.

[0043] The method for immobilizing the carboxyl group-containing O-substituted monohydroxylamine and the amine by physical adsorption is not particularly limited, but examples thereof include a method in which the carboxyl group-containing O-substituted monohydroxylamine and the amine are dissolved in a solvent such as water, the above-mentioned carrier is then added, the carrier is impregnated with the carboxyl group-containing O-substituted monohydroxylamine and the amine, and the solvent is then distilled off.

[0044] The amount of the carboxyl group-containing O-substituted monohydroxylamine and amine supported on the carrier can be adjusted as desired depending on the purpose and is not particularly limited, but is preferably in the range of 0.01 to 30% by weight, more preferably in the range of 0.1 to 10% by weight. [Example]

[0045] The present invention will be specifically described below, but it should not be construed that the present invention is limited to these examples.

[0046] The polyethyleneimine used was Epomin P-1000 (manufactured by Nippon Shokubai, molecular weight 70,000).

[0047] The following abbreviations are used for aldehydes:

[0048] Formaldehyde = FA, Acetaldehyde = AA, Propionaldehyde = PA, Butyraldehyde = BA, Valeraldehyde = VA, Isovaleraldehyde = i-VA Reference example 1 The urethane foam (10 × 10 × 4 cm) was sealed in a Tedlar bag and degassed under reduced pressure, followed by the injection of 5 L of nitrogen gas. After standing at 65°C for 2 hours, the gas in the Tedlar bag was adsorbed onto a cartridge (product name: Presep-C DNPH, manufactured by Wako Pure Chemical Industries, Ltd.) loaded with 2,4-dinitrophenylhydrazine (DNPH). The DNPH-aldehyde condensate was eluted from the cartridge (eluent: acetonitrile). The DNPH-aldehyde condensate in the eluate was quantified using a liquid chromatograph (instrument name: Agilent 1220 Infinity LC, manufactured by Agilent Technologies) to calculate the released AA concentration, which was found to be 0.29 mg / m. 3 It was.

[0049] <Testing for capturing aldehydes derived from urethane foam using liquid deodorant> Example 1 An aqueous solution (pH = 7) containing 3% by weight of aminooxyacetic acid and 3% by weight of polyethyleneimine was prepared as a liquid deodorant. This liquid deodorant was applied to each side of a urethane foam (10 cm x 10 cm x 4 cm) at a rate of 20 g / m. 2 The urethane foam was then sealed in a Tedlar bag and degassed under reduced pressure, after which 5 L of nitrogen gas was injected. After standing at 65°C for 2 hours, the aldehyde concentration in the Tedlar bag was quantified in the same manner as in Reference Example 1. Furthermore, the AA capture rate was calculated based on the AA release concentration in Reference Example 1 (0.29 mg / m 3 ) was calculated using the following formula.

[0050] Capture rate [%]={(0.29-residual concentration])÷0.29}×100.

[0051] Example 2 The same procedure as in Example 1 was carried out, except that an aqueous solution (pH=5) containing 3% by weight of aminooxyacetic acid and 2% by weight of polyethyleneimine was used as the liquid deodorant.

[0052] Example 3 The same procedures as in Example 1 were carried out, except that an aqueous solution (pH=7) containing 3% by weight of aminooxyacetic acid and 4% by weight of trishydroxymethylaminomethane was used as the liquid deodorant.

[0053] Comparative Example 1 The same procedure as in Example 1 was carried out, except that an aqueous solution (pH=8) containing 5% by weight of adipic acid dihydrazide was used as the liquid deodorant.

[0054] Comparative Example 2 The same procedure as in Example 1 was carried out, except that an aqueous solution (pH=10) containing 3% by weight of polyethyleneimine was used as the liquid deodorant.

[0055] Comparative Example 3 The same procedures as in Example 1 were carried out, except that an aqueous solution (pH=7) containing 3% by weight of aminooxyacetic acid and 0.6% by weight of sodium hydroxide was used as the liquid deodorant.

[0056] Comparative Example 4 The same procedure as in Example 1 was carried out, except that an aqueous solution (pH=7) containing 3% by weight of polyethyleneimine and 0.2% by weight of hydrogen chloride was used as the liquid deodorant.

[0057] The results of Examples 1 to 3 and Comparative Examples 1 to 4 are shown in Table 1. As is clear from Table 1, the deodorants of the present invention exhibited higher aldehyde scavenging performance than existing deodorants. Furthermore, when aminooxyacetic acid or polyethyleneimine was simply neutralized with hydrochloric acid or sodium hydroxide, the aldehyde scavenging performance was low.

[0058] [Table 1]

[0059] <Aldehyde capture test using solid deodorant> Example 4 0.2 g of the liquid deodorant prepared in Example 1 was dropped onto a 10 × 10 cm sheet of bleached paper and then dried at 60°C for 1 hour to prepare a solid deodorant. This solid deodorant was sealed in a Tedlar bag and degassed under reduced pressure, and then mixed with aldehyde gas (component concentration: FA = 70 mg / m 3 , AA=96mg / m 3 , PA=92mg / m 3 , BA=84mg / m 3 , VA=86mg / m 3 , i-VA=90mg / m 3 ) was poured into the bag. After leaving it at room temperature for 2 hours, the aldehyde concentration in the Tedlar bag was quantified in the same manner as in the Reference Example. Furthermore, the aldehyde capture rate was calculated using the following formula.

[0060] Capture rate [%] = {(initial concentration - residual concentration) ÷ initial concentration} x 100.

[0061] Example 5 The solid deodorant was prepared in the same manner as in Example 4, except that the liquid deodorant prepared in Example 3 was used.

[0062] Example 6 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH=7) containing 3 wt % aminooxyacetic acid and 5 wt % triethanolamine was used as the liquid deodorant.

[0063] Example 7 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH = 7) containing 3 wt% aminooxyacetic acid and 4 wt% ethylenediamine-N,N,N',N'-tetraethanol was used as the liquid deodorant.

[0064] Example 8 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH=7) containing 3% by weight of aminooxyacetic acid and 6% by weight of 1,4-piperazinediethanol was used as the liquid deodorant.

[0065] Example 9 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH = 7) containing 3 wt% aminooxyacetic acid and 5 wt% 1-(2,3-dihydroxypropyl)piperazine was used as the liquid deodorant.

[0066] Example 10 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH = 7) containing 3 wt% aminooxyacetic acid and 4 wt% 2-hydroxymethyltriethylenediamine was used as the liquid deodorant.

[0067] Example 11 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution (pH=7) containing 3 wt % aminooxyacetic acid and 3 wt % piperazine was used as the liquid deodorant.

[0068] Comparative Example 5 The solid deodorant was prepared in the same manner as in Example 4, except that no liquid deodorant was used.

[0069] Comparative Example 6 The solid deodorant was prepared in the same manner as in Example 4, except that the liquid deodorant prepared in Comparative Example 1 was used.

[0070] Comparative Example 7 The solid deodorant was prepared in the same manner as in Example 4, except that an aqueous solution containing 3 wt % aminooxyacetic acid (adjusted to pH 7 by adding sodium bicarbonate) was used as the liquid deodorant.

[0071] The results of Examples 4 to 11 and Comparative Examples 5 to 7 are shown in Table 2. As is clear from Table 2, the deodorant of the present invention exhibited higher aldehyde capturing performance than existing deodorants.

[0072] [Table 2]

[0073] <Carboxylic acid capture test using solid deodorant> Example 12 The solid deodorant prepared in Example 4 was sealed in a Tedlar bag and degassed under reduced pressure, and then the concentration was 25 mg / m 3 1 L of acetic acid gas was injected. After leaving it at room temperature for 30 minutes, the acetic acid concentration in the Tedlar bag was quantified using a gas detector tube (Gastec). Furthermore, the acetic acid capture rate was calculated using the following formula.

[0074] Capture rate [%] = {(initial concentration - residual concentration) ÷ initial concentration} x 100.

[0075] Example 13 The same procedures as in Example 12 were carried out, except that the liquid deodorant prepared in Example 2 and a solid deodorant obtained in the same manner as in Example 4 were used.

[0076] Comparative Example 8 The solid deodorant was prepared in the same manner as in Example 12, except that an aqueous solution (pH=3) containing 3% by weight of aminooxyacetic acid was used as the liquid deodorant.

[0077] The results of Examples 12 to 13 and Comparative Example 8 are shown in Table 3. As is clear from Table 3, the deodorant of the present invention exhibited higher carboxylic acid capturing performance than existing deodorants.

[0078] [Table 3]

[0079] Example 14 Three aluminum test pieces (alloy number = A1050, 30 × 20 × 2 mm) were immersed in 500 mL of the liquid deodorant prepared in Example 1 at room temperature for one week, then washed with water and brushed, and the corrosion rate was calculated from the change in weight before and after immersion (average value of the three test pieces).

[0080] Example 15 The same procedure as in Example 14 was carried out except that a brass test piece (alloy number = C3604) was used instead of the aluminum test piece.

[0081] Comparative Example 9 The same procedures as in Example 14 were carried out except that an aqueous solution (pH=3) containing 3% by weight of aminooxyacetic acid was used as the liquid deodorant.

[0082] Comparative Example 10 The same procedure as in Example 15 was carried out, except that an aqueous solution (pH=3) containing 3% by weight of aminooxyacetic acid was used as the liquid deodorant.

[0083] The results of Examples 14 and 15 and Comparative Examples 9 and 10 are shown in Table 4. As is clear from Table 4, the deodorants of the present invention were less corrosive to metals than existing deodorants.

[0084] [Table 4] [Industrial Applicability]

[0085] The deodorant of the present invention quickly captures aldehydes and carboxylic acids, thereby reducing odors caused by aldehydes and carboxylic acids and improving the human living environment.

Claims

1. The following general formula (1) 【Chemical 1】 (In the formula, R represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, or an arylalkyl group having 7 to 15 carbon atoms. n represents an integer of 1 to 6. Multiple Rs may be the same or different.) or a chemically acceptable salt thereof, and one or more amines selected from the group consisting of polyethyleneimine, diethanolamine, triethanolamine, trishydroxymethylaminomethane, ethylenediamine-N,N,N',N'-tetraethanol, 1,4-piperazinediethanol, piperazine, 1-(2,3-dihydroxypropyl)piperazine, and 2-hydroxymethyltriethylenediamine, and water, and the deodorant that captures aldehydes and carboxylic acids is characterized by having a pH range of 5 to 9.

2. The deodorant according to claim 1, wherein in general formula (1), R is any one of a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a benzyl group, and a phenyl group.

3. A deodorizing method comprising removing aldehydes and carboxylic acids by using the deodorizer according to claim 1 or 2.

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