Deodorant solution

Abstract

The present invention provides a deodorant, which can efficiently remove multiple malodor components at the same time, has a high effect on complex malodors generated in factories, business premises or general households, and is safe and easy to use in general households. The deodorant of the present invention is a deodorant solution, characterized in that an iodine compound is dissolved in an aqueous solvent. As iodine compounds, there can be mentioned: iodine oxides such as iodine pentoxide; iodic acid, periodic acid, iodous acid, hypoiodous acid and other iodine oxygen acids; iodine oxygen acid salts such as iodates, periodates, iodites, hypoiodites and other iodine. The deodorant solution of the present invention can be applied to the deodorization of thiol-based odors, ammonia / amine-based odors, aldehyde-based odors and the like.

Description

Technical Field

[0001] The present invention relates to a deodorant solution, and more particularly to a deodorant having an excellent deodorizing effect on a wide range of malodors originating from sulfur compounds, nitrogen compounds, aldehyde compounds, and the like. Background Art

[0002] There are many types of foul odors and their sources are also diverse. There are foul odors from sewage and sludge in sewage treatment plants; foul odors from exhaust smoke, waste liquid, and drainage in various factories; foul odors from kitchens in public / public facilities; foul odors caused by smoking, garbage, etc.; foul odors from feces and urine facilities; foul odors caused by asphalt or oil during road repairs; etc. There are also various odor substances. In addition, in homes or nursing facilities, unpleasant odors from kitchens, toilets, bathrooms, pets, smoking, wet garbage, etc. accompany daily life.

[0003] Solving the problem of bad odor is essential to maintaining a hygienic and comfortable living environment. Many deodorants have been proposed to remove bad odors in the atmosphere and reduce the concentration of bad odors.

[0004] For example, Patent Document 1 discloses a deodorant for sulfur-based malodorous substances, which uses a peroxide in combination with at least one compound selected from hydroxybenzoic acid esters, halogen acids, alkali metal salts of halogen acids, tannic acid, salicylaldehyde, and p-chloroacetophenone, and can suppress the generation of sulfur-based malodorous substances such as hydrogen sulfide and methyl mercaptan generated from sludge, etc. for a long time.

[0005] Patent Document 2 discloses a sulfur-based gas deodorant which is an amorphous complex of at least one metal salt selected from copper, zinc, manganese, cobalt, and nickel and a silicate, and has a pore volume of 0.3 to 0.5 ml / g.

[0006] Patent Document 3 discloses a deodorant soap characterized by containing chlorophyll and persimmon tannin, and describes that alkaline chlorophyll exerts a strong effect on acidic gases such as methyl mercaptan and hydrogen sulfide.

[0007] Patent document 4 discloses a deodorant containing a composite metal silicate containing metals such as zinc, copper, aluminum, and iron, or a preparation of the composite metal silicate in combination with titanium oxide as an active ingredient, which is effective against both alkaline odors such as ammonia and sulfur-based odors such as hydrogen sulfide and methyl mercaptan.

[0008] Patent Document 5 discloses a deodorant material in which a deodorant such as a metal phthalocyanine complex is supported on a carrier such as dried kenaf, and the deodorant material exhibits excellent deodorizing performance against odors such as ammonia, hydrogen sulfide, and methyl mercaptan, and also has excellent durability of deodorizing performance.

[0009] Patent Document 6 discloses a deodorant composition containing a myrrh extract obtained by extracting myrrh resin with a solvent containing ethanol and glycerin as an active ingredient, and the composition exhibits an excellent deodorizing effect particularly on acetic acid odor.

[0010] Patent Document 7 discloses an aldehyde deodorizing composition comprising an ammonium salt and urea, which is highly safe and exhibits high deodorizing properties against formaldehyde and acetaldehyde.

[0011] Among the various unpleasant odors in living spaces, there are components that cause the odors, such as amines such as trimethylamine, which are the rotten odors of fish and meat; hydrogen sulfide, which is the rotten odor of eggs and milk; thiols such as methyl mercaptan, which are the rotten odors of vegetables and wet garbage; ammonia, which is the cause of toilet odors; lower fatty acids such as acetic acid, propionic acid, isovaleric acid, and hexanoic acid; aldehydes such as formaldehyde and acetaldehyde; etc.

[0012] However, the above-mentioned conventional techniques can exert a deodorizing function on some of these components, but cannot exert sufficient deodorizing performance on all the components.

[0013] In addition, the above-mentioned prior art deodorants have the following problems: from the perspective of safety, users are limited to those with professional knowledge; and problems such as coloration and precipitation occur, which detract from the appearance during use, and there is room for further improvement.

[0014] Prior art literature

[0015] Patent Literature

[0016] Patent Document 1: Japanese Patent Application Publication No. 2007-083094

[0017] Patent Document 2: Japanese Patent Application Publication No. 2005-087630

[0018] Patent Document 3: Japanese Patent Application Publication No. 2011-037970

[0019] Patent Document 4: Japanese Patent Application Publication No. 2006-223645

[0020] Patent Document 5: Japanese Patent Application Publication No. 2012-245206

[0021] Patent Document 6: Japanese Patent Application Publication No. 2011-218063

[0022] Patent Document 7: Japanese Patent Application Publication No. 2007-313300 Summary of the invention

[0023] Problems to be solved by the invention

[0024] The present invention is made in view of the above-mentioned background technology, and its object is to provide a deodorant that can efficiently remove multiple malodor components at the same time, has a high effect on complex malodors generated in factories, business premises or ordinary households, and is safe and easy to use in ordinary households.

[0025] Means for solving problems

[0026] The present inventors have repeatedly conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a solution containing a specific iodine compound as an active ingredient has an extremely high deodorizing effect not only on sulfur-based gases such as mercaptans and hydrogen sulfide, but also on alkaline malodors such as ammonia and trimethylamine. Furthermore, the inventors have found that by adding a pH adjuster to a solution containing an iodine compound as an active ingredient, which is usually acidic, and raising the pH to near neutral, not only the safety is improved, but also the deodorizing effect on aldehydes is enhanced, thereby completing the present invention.

[0027] That is, the present invention provides a deodorant solution characterized in that at least one iodine compound selected from the group consisting of iodine oxides, iodine oxyacids and iodine oxyacid salts is dissolved in an aqueous solvent.

[0028] Effects of the Invention

[0029] According to the present invention, it is possible to provide a deodorant solution that can efficiently remove a plurality of malodor components simultaneously and can be applied to complex malodors generated in factories, business premises, ordinary households, and the like.

[0030] In the present invention, by using an iodine compound and a pH adjuster in combination and using it at a temperature near neutral, a deodorant solution with high safety and easy handling can be provided, which can deal with various odors generated not only in places where people with professional knowledge are present, such as factories and business premises, but also in general households.

[0031] In addition, by adjusting the pH to near neutral, the removal efficiency of malodors caused by aldehydes, which are relatively difficult to remove, is improved.

[0032] The deodorant solution of the present invention is colorless and transparent by appropriately adjusting the amount of the iodine compound, and does not produce coloration or precipitation even if stored for a long time. Therefore, the deodorant solution of the present invention is suitable for use in a general household in the form of spraying to easily remove malodorous gases. DETAILED DESCRIPTION

[0033] Hereinafter, the present invention will be described, but the present invention is not limited to the following embodiments and can be implemented with arbitrary modifications.

[0034] The present invention relates to a deodorant solution, characterized in that an iodine compound is dissolved in an aqueous solvent.

[0035] The iodine compound as an active ingredient in the deodorant solution of the present invention is one or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids and iodine oxyacid salts.

[0036] Examples of iodine oxides include diiodine pentoxide (I2O5), diiodine tetroxide (I2O4), and tetraiodine nonoxide (I4O9).

[0037] Examples of iodine-containing oxygen acids include iodic acid (HIO 3 ), periodic acid (HIO 4 ), iodous acid (HIO 2 ), and hypoiodous acid (HIO).

[0038] Examples of iodine-containing oxygen acid salts include iodates such as lithium iodate (LiIO3), sodium iodate (NaIO3), potassium iodate (KIO3), ammonium iodate (NH4IO3), magnesium iodate (Mg(IO3)2), calcium iodate (Ca(IO3)2), and barium iodate (Ba(IO3)2); and lithium periodate (LiIO4), sodium periodate (NaIO4), potassium periodate (KIO4), ammonium periodate (NH4IO4), magnesium periodate (Mg(IO4)2), calcium periodate (Ca(IO4)2), and barium periodate (Ba(IO4)2). ) and other periodates; iodites such as lithium iodite (LiIO2), sodium iodite (NaIO2), potassium iodite (KIO2), ammonium iodite (NH4IO2), magnesium iodite (Mg(IO2)2), calcium iodite (Ca(IO2)2), and barium iodite (Ba(IO2)2); hypoiodites such as lithium hypoiodite (LiIO), sodium hypoiodite (NaIO), potassium hypoiodite (KIO), ammonium hypoiodite (NH4IO), magnesium hypoiodite (Mg(IO2)2), calcium hypoiodite (Ca(IO2)2), and barium hypoiodite (Ba(IO2)2); etc.

[0039] The above-mentioned iodine compounds may be used alone or in combination of two or more.

[0040] Among these, diiodine pentoxide, iodic acid, periodic acid, sodium iodate, and potassium iodate are particularly preferred in terms of availability and good balance in deodorizing properties for various odorous gases.

[0041] For example, iodine pentoxide is a white, odorless, strongly oxidizing inorganic compound with a solubility in water of 187 g / 100 mL (13° C.), and a 10% aqueous solution (100 g / L, 25° C.) has a pH of about 0.3, and a 2% aqueous solution is also a strongly acidic aqueous solution with a pH of 1.5. In this pH range, a solution containing iodine pentoxide as an active ingredient shows a high deodorizing effect on alkaline odors such as ammonia and trimethylamine, and also has a high deodorizing effect on sulfur-based odors such as hydrogen sulfide and methyl mercaptan.

[0042] However, in this pH range, there are problems in terms of safety and convenience of use. Here, by adjusting the pH to adjust the liquid property of the diiodine pentoxide aqueous solution from the strongly acidic region to the weakly acidic to neutral to weakly alkaline region, a deodorant solution can be prepared that has excellent safety and stability and exhibits a high deodorizing effect on alkaline odors of amines such as ammonia and trimethylamine, sulfur-based odors such as hydrogen sulfide and methyl mercaptan, and aldehyde-based odors.

[0043] The content of the iodine compound in the deodorant solution of the present invention (the total content when two or more iodine compounds are used together) is preferably 0.0001 mol / L or more, more preferably 0.0005 mol / L or more, and particularly preferably 0.002 mol / L or more. In addition, it is preferably 0.3 mol / L or less, more preferably 0.1 mol / L or less, and particularly preferably 0.06 mol / L or less.

[0044] When the content is above the above lower limit, it is easy to exert a sufficient deodorizing effect. When the content is below the above upper limit, the cost can be suppressed. In addition, when the iodine compound is contained beyond the above upper limit, the solution may be colored due to free iodine, etc.

[0045] The deodorant solution of the present invention is suitable for use as a solution for deodorizing various malodors. Specifically, examples of the malodors include: hydrogen sulfide; thiol compounds such as methyl mercaptan, ethyl mercaptan, propyl mercaptan, and butyl mercaptan; ammonia; amine compounds such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, and triethylamine; aldehyde compounds such as formaldehyde and acetaldehyde; fatty acid compounds such as acetic acid, propionic acid, butyric acid, valeric acid, isovaleric acid, and caproic acid; and the like.

[0046] In the deodorant solution of the present invention, examples of the aqueous solvent in which the iodine compound is dissolved include water such as ion exchange water and tap water, a mixed solvent of water and a water-soluble organic solvent, etc. From the viewpoint of deodorizing performance, etc., the aqueous solvent is preferably water.

[0047] In addition, when a mixed solvent of water and a water-soluble organic solvent is used, examples of the water-soluble organic solvent include: monohydric alcohols such as methanol, ethanol, propanol, isopropanol, and butanol; polyhydric alcohols such as ethylene glycol, propylene glycol, 1,3-propylene glycol, 1,3-butanediol, 1,4-butanediol, polyethylene glycol, polypropylene glycol, and glycerol; glycol monoethers such as lower alkyl ethers of these polyhydric alcohols; and the like.

[0048] When a mixed solvent of water and a water-soluble organic solvent is used, only one of the above-mentioned water-soluble organic solvents may be mixed with water and used, or two or more of them may be mixed with water and used.

[0049] When the mixed solvent of water and the water-soluble organic solvent contains a monohydric alcohol, an antibacterial effect can be added to the deodorant solution.

[0050] When the mixed solvent of water and a water-soluble organic solvent contains a polyol, when the deodorant solution is applied to a substrate such as cloth, paper, nonwoven fabric, or wood, the deodorant component is easily fixed to the substrate, thereby improving the sustainability of the deodorizing effect.

[0051] In addition, when a mixed solvent of water and a water-soluble organic solvent is used, the solubility of various additives described later is excellent, and added value can be imparted to the deodorant solution.

[0052] When a mixed solvent of water and a water-soluble organic solvent is used, the lower limit of the proportion of the water-soluble organic solvent is preferably 3% by mass or more, particularly preferably 5% by mass or more, and the upper limit is preferably 20% by mass or less, particularly preferably 10% by mass or less.

[0053] The deodorant solution of the present invention may further contain a pH adjuster. Oxides of iodine and iodine-containing oxyacids are strongly acidic, and simply dissolving them in an aqueous solvent may not ensure safety for use in general households.

[0054] By using a pH adjuster to increase the pH (particularly, to near neutral), safety is improved, and it becomes easy to use in general households and the like.

[0055] Examples of pH adjusters include: amine compounds such as monoethanolamine, diethanolamine, triethanolamine, diethylenetriamine, triethylenetetramine, tris(hydroxymethyl)aminomethane, N-methyldiethanolamine, 3-amino-1,2-propanediol, and 2-amino-2-methylpropanol; alkaline inorganic compounds such as sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, sodium sesquicarbonate, and sodium percarbonate; alkali metal salts (e.g., sodium salts, potassium salts, ammonium salts, magnesium salts, and calcium salts) of organic acids such as malic acid, succinic acid, maleic acid, and citric acid.

[0056] These pH adjusters may be used alone or in combination of two or more.

[0057] When the deodorant solution of the present invention contains an amine compound, the pH is near neutral, so that not only the safety is improved, but also the deodorizing performance against aldehyde compounds that are relatively difficult to remove is improved.

[0058] Among them, amine compounds having a primary amino group such as monoethanolamine, diethylenetriamine, triethylenetetramine, tris(hydroxymethyl)aminomethane, 3-amino-1,2-propanediol, and 2-amino-2-methylpropanol are particularly likely to improve the deodorizing performance against aldehyde compounds.

[0059] From the viewpoint of deodorizing performance, the pH of the deodorant solution of the present invention is preferably 1.5 or higher, more preferably 2 or higher, and particularly preferably 4 or higher.

[0060] Furthermore, from the viewpoint of ensuring safety, it is preferably 5 or more, more preferably 6 or more, and particularly preferably 7 or more.

[0061] The pH of the deodorant solution of the present invention is preferably 9.8 or lower, more preferably 9 or lower, and particularly preferably 8 or lower.

[0062] When the pH is below the upper limit, the amount of the pH adjuster will not be excessive, which is advantageous in terms of cost. In addition, from the perspective of safety, it is also desirable that the pH is below the upper limit.

[0063] Among the above-mentioned pH ranges, a particularly preferred range is determined according to the type of target malodorous gas.

[0064] In the case of hydrogen sulfide and mercaptan-based odors, the oxidizing action of iodine compounds is enhanced. Therefore, from the perspective of deodorization, the lower the pH, the better. The optimal pH is determined while taking safety into consideration.

[0065] In the case of ammonia / amine-based odors, the lower the pH, the better from the perspective of deodorizing properties.

[0066] On the other hand, in the case of aldehyde-based odors, as shown in the examples described later, the higher the pH, the better the deodorizing property. Therefore, from the perspective of cost, it is desirable to use a pH adjuster in an amount that is not excessive to increase the pH.

[0067] The deodorant solution of the present invention may be blended with additives such as flavorings, essential oils, colorants, plant extracts, preservatives, bactericidal and antibacterial agents, and surfactants within the range that does not hinder the deodorizing effect.

[0068] Examples of preservatives or antimicrobial agents include parabens, isothiazolinones, pyrithione salts, nitrites, and triazines.

[0069] These may be used alone or in combination of two or more.

[0070] As the surfactant, any of a cationic surfactant, an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant can be used.

[0071] Cationic surfactants and amphoteric surfactants can impart antibacterial, disinfecting, antiseptic and other effects and also contribute to improving the stability of the solution and the stability of pH, and therefore are particularly preferably added to the deodorant solution of the present invention.

[0072] Examples of cationic surfactants include quaternary ammonium salts such as benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride, dequalinium chloride, hexadecyltrimethylammonium bromide, and benzalkonium cetyl phosphate; alkyl carboxylates; alkyl sulfates; alkyl sulfonates; and alkyl phosphates.

[0073] Among the above, quaternary ammonium salts are particularly preferred because they are less susceptible to the influence of pH, metal ions, and the like.

[0074] Examples of anionic surfactants include amine salt-type surfactants.

[0075] Examples of the amphoteric surfactant include amino acid-based surfactants, betaine-based surfactants, and phosphate-based surfactants.

[0076] Examples of the nonionic surfactant include polyethylene glycol alkyl ethers, polyethylene glycol fatty acid esters, alkyl glycosides, fatty acid alkanolamides, glycerol fatty acid esters, alkyl glyceryl ethers, sorbitan fatty acid esters, polyethylene glycol sorbitan fatty acid esters, and sucrose fatty acid esters.

[0077] These surfactants may be used alone or in combination of two or more.

[0078] When the deodorant solution of the present invention contains a surfactant, it can also exhibit a deodorizing effect on odorous gases that are poorly soluble in water, such as ethyl mercaptan, propyl mercaptan, and butyl mercaptan.

[0079] Furthermore, the iodine compound, which is an effective ingredient of the deodorant solution of the present invention, has good compatibility with surfactants, and even if the surfactant is contained, the deodorizing effect on water-soluble odorous gases is not weakened.

[0080] The content of the surfactant in the deodorant solution of the present invention (the total content when two or more surfactants are used in combination) is preferably in the range of 50 to 2000 ppm by mass.

[0081] When the content is within the above range, the cost can be easily suppressed and the deodorizing effect on poorly water-soluble odorous gases can be easily fully exhibited.

[0082] The deodorant solution of the present invention can be used in various forms according to the use conditions. For example, it can be used directly in the state of a solution, or it can be loaded on a substrate such as activated carbon, silica gel, molecular sieve to form a solid such as granules, or it can be mixed on a gel-like substrate to form a solid or semi-solid form.

[0083] According to the above-mentioned form, it can be directly sprayed to the source of bad odor such as toilets, kitchens, sinks, washbasins, bathrooms, drains, drains, garbage bins, dust and mustard treatment plants, or sprayed or left in the atmosphere where the bad odor is generated.

[0084] When used in solid or semi-solid form, it has the characteristic of increasing the contact area with malodorous gases and improving efficiency by increasing the surface area. On the other hand, it has the disadvantage that the maximum volume of reactive groups of the adsorbent monomer decreases over time, thereby damaging the original performance of the adsorbent.

[0085] On the other hand, the deodorant of the present invention can also be used directly in the form of a solution. In this case, it can be sprayed directly in a large space or a closed space, or it can be sprayed onto fibers such as clothes, walls, and other objects. It can also be made into a placeable type that is absorbed by jelly, beads, etc. and then placed in a container, so that it can efficiently come into contact with bad odors to deodorize.

[0086] Example

[0087] The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples unless the gist of the invention is exceeded.

[0088] It should be noted that, unless otherwise stated, "%" means "mass %".

[0089] [Preparation of deodorant solution]

[0090] Preparation Example 1

[0091] Diiodine pentoxide (manufactured by Wako Chemical Industry Co., Ltd.) was dissolved in ion-exchanged water to prepare a deodorant solution 1 having a diiodine pentoxide concentration of 0.009 mol / L (about 0.3%).

[0092] The pH of the deodorant solution 1 was 1.9, and the appearance was colorless and transparent.

[0093] Preparation Example 2

[0094] Iodic acid (manufactured by Wako Chemical Industry Co., Ltd.) was dissolved in ion-exchanged water to prepare a deodorant solution 2 having an iodic acid concentration of 0.009 mol / L (about 0.17%).

[0095] The pH of the deodorant solution 2 was 1.9, and the appearance was colorless and transparent.

[0096] Preparation Example 3

[0097] Sodium iodate (manufactured by Wako Chemical Industry Co., Ltd.) was dissolved in ion-exchanged water to prepare a deodorant solution 3 having a sodium iodate concentration of 0.009 mol / L (about 0.19%).

[0098] The pH of the deodorant solution 3 was 6.3, and the appearance was colorless and transparent.

[0099] Preparation Example 4

[0100] Sodium periodate (manufactured by Wako Chemical Industry Co., Ltd.) was dissolved in ion-exchanged water to prepare a deodorant solution 4 having a sodium periodate concentration of 0.009 mol / L (about 0.2%).

[0101] The pH of the deodorant solution 4 was 4.4, and the appearance was colorless and transparent.

[0102] Preparation Example 5

[0103] Potassium iodide (manufactured by Wako Chemical Industry Co., Ltd.) was dissolved in ion-exchanged water to prepare a deodorant solution 5 having a potassium iodide concentration of 0.009 mol / L (about 0.16%).

[0104] The pH of the deodorant solution 5 was 7.6, and the deodorant solution 5 had a slightly white turbid appearance.

[0105] Preparation Example 6

[0106] Diiodine pentoxide was dissolved in ion exchange water to prepare a deodorant solution 6 having a diiodine pentoxide concentration of 0.5 mol / L (about 16.7%).

[0107] In the deodorant solution 6, iodine was free and the solution had a brown color, and was not suitable as a deodorant solution.

[0108] Preparation Example 7

[0109] Iodine pentoxide (manufactured by Wako Chemical Industry) was dissolved in ion exchange water to prepare a solution (pH 1.9) having an iodine pentoxide concentration of 0.06 mol / L (about 2%). To this solution, triethanolamine was added in an amount to adjust the pH to 7.5, thereby preparing a deodorant solution 7.

[0110] The deodorant solution 7 had a colorless and transparent appearance.

[0111] Preparation Example 8

[0112] The deodorant solution 7 prepared in Preparation Example 7 was diluted 6 times with ion exchange water to prepare a deodorant solution 8 having an iodine pentoxide concentration of 0.009 mol / L (about 0.3%).

[0113] The pH of the deodorant solution 8 is about 7.5, and the appearance is colorless and transparent.

[0114] Preparation Example 9

[0115] Deodorant solution 9 having an iodine pentoxide concentration of 0.003 mol / L (about 0.1%) was prepared by diluting deodorant solution 7 prepared in Preparation Example 7 by 20 times with ion exchange water.

[0116] The pH of the deodorant solution 9 is about 7.5, and the appearance is colorless and transparent.

[0117] Preparation Example 10

[0118] The deodorant solution 7 prepared in Preparation Example 7 was diluted 50 times with ion exchange water to prepare a deodorant solution 10 having an iodine pentoxide concentration of 0.0012 mol / L (about 0.04%).

[0119] The pH of the deodorant solution 10 is about 7.5, and the appearance is colorless and transparent.

[0120] Preparation Example 11

[0121] The deodorant solution 7 prepared in Preparation Example 7 was diluted 100 times with ion exchange water to prepare a deodorant solution 11 having an iodine pentoxide concentration of 0.0006 mol / L (about 0.02%).

[0122] The pH of the deodorant solution 11 is about 7.5, and its appearance is colorless and transparent.

[0123] Preparation Example 12

[0124] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethanolamine (TEA) was added in an amount to adjust the pH to 5.5, thereby preparing a deodorant solution 12.

[0125] The deodorant solution 12 has a colorless and transparent appearance.

[0126] Preparation Example 13

[0127] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethanolamine (TEA) was added in an amount to adjust the pH to 7.0, thereby preparing a deodorant solution 13.

[0128] The deodorant solution 13 has a colorless and transparent appearance.

[0129] Preparation Example 14

[0130] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethanolamine (TEA) was added in an amount to adjust the pH to 9.0, thereby preparing a deodorant solution 14.

[0131] The deodorant solution 14 has a colorless and transparent appearance.

[0132] Preparation Example 15

[0133] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethylenetetramine (TETA) was added in an amount to adjust the pH to 5.5, thereby preparing a deodorant solution 15.

[0134] The deodorant solution 15 has a colorless and transparent appearance.

[0135] Preparation Example 16

[0136] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethylenetetramine (TETA) was added in an amount to adjust the pH to 7.0, whereby a deodorant solution 16 was prepared.

[0137] The deodorant solution 16 has a colorless and transparent appearance.

[0138] Preparation Example 17

[0139] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, triethylenetetramine (TETA) was added in an amount to adjust the pH to 9.0, thereby preparing a deodorant solution 17.

[0140] The deodorant solution 17 has a colorless and transparent appearance.

[0141] Preparation Example 18

[0142] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, tris(hydroxymethyl)aminomethane (THMAM) was added in an amount to adjust the pH to 5.5, thereby preparing a deodorant solution 18.

[0143] The deodorant solution 18 has a colorless and transparent appearance.

[0144] Preparation Example 19

[0145] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, tris(hydroxymethyl)aminomethane (THMAM) was added in an amount to adjust the pH to 7.0, whereby a deodorant solution 19 was prepared.

[0146] The deodorant solution 19 has a colorless and transparent appearance.

[0147] Preparation Example 20

[0148] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, tris(hydroxymethyl)aminomethane (THMAM) was added in an amount to adjust the pH to 9.0, thereby preparing a deodorant solution 20 .

[0149] The deodorant solution 20 has a colorless and transparent appearance.

[0150] Preparation Example 21

[0151] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, 3-amino-1,2-propanediol (AMPD) was added in an amount to adjust the pH to 5.5, thereby preparing a deodorant solution 21.

[0152] The deodorant solution 21 has a colorless and transparent appearance.

[0153] Preparation Example 22

[0154] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, 3-amino-1,2-propanediol (AMPD) was added in an amount to adjust the pH to 7.0, thereby preparing a deodorant solution 22.

[0155] The deodorant solution 22 has a colorless and transparent appearance.

[0156] Preparation Example 23

[0157] To the deodorant solution 1 (pH 1.9) prepared in Preparation Example 1, 3-amino-1,2-propanediol (AMPD) was added in an amount to adjust the pH to 9.0, thereby preparing a deodorant solution 23.

[0158] The deodorant solution 23 has a colorless and transparent appearance.

[0159] [Deodorization test]

[0160] A 3L glass detachable flask (hereinafter referred to as "flask") with a gas injection port, a pressure adjustment port, a detection tube measurement port, and a preparation port was prepared. The target malodorous gas was injected from the gas injection port using a syringe, and the flask was stirred for 10 seconds using an air pump. After standing for 10 minutes, the initial concentration of the target malodorous gas in the flask was measured using a detection tube.

[0161] Next, 3 mL of the deodorant solution was poured into the flask to start the deodorization test.

[0162] The concentration (volume ppm) of the target malodorous gas in the flask at the time when a predetermined time has passed (after 15 minutes, 30 minutes, 60 minutes, and 120 minutes) was measured, and the deodorization rate (%) was calculated by the following formula (1).

[0163] [Number 1]

[0164]

[0165] Table 1 shows the results of the deodorization test of the deodorant solution 1 (containing diiodine pentoxide, pH 1.9) on various malodorous gases.

[0166] In addition, in Table 1, "-" means not measured (the same applies to other tables).

[0167] [Table 1]

[0168]

[0169] Table 2 shows the results of the deodorization test of the deodorant solution 2 (containing iodic acid, pH 1.9) on various malodorous gases.

[0170] [Table 2]

[0171]

[0172] Table 3 shows the results of the deodorization test of the deodorant solution 3 (containing sodium iodate, pH 6.3) on various malodorous gases.

[0173] [Table 3]

[0174]

[0175] Table 4 shows the results of the deodorization test of deodorant solution 4 (containing sodium periodate, pH 4.4) on various malodorous gases.

[0176] [Table 4]

[0177]

[0178] Table 5 shows the results of the deodorization test of the deodorant solution 5 (containing potassium iodide, pH 7.6) on various malodorous gases.

[0179] [Table 5]

[0180]

[0181] Deodorant solutions 1 to 4 containing iodine oxide, iodine oxyacid or iodine oxyacid salt have good deodorizing properties against methyl mercaptan, hydrogen sulfide, trimethylamine, ammonia and propionic acid. Deodorant solutions 1 to 4 are acidic and have weak deodorizing properties against acetaldehyde.

[0182] On the other hand, the deodorant solution 5 was inferior to the deodorant solutions 1 to 4 in terms of deodorizing properties against hydrogen sulfide and methyl mercaptan.

[0183] Table 6 shows the results of the deodorization test on methyl mercaptan of deodorant solutions 7 to 11 (weakly alkaline), and Table 7 shows the results of the deodorization test on hydrogen sulfide.

[0184] [Table 6]

[0185]

[0186] [Table 7]

[0187]

[0188] When triethanolamine was added to a solution containing iodine pentoxide to make it weakly alkaline, it was confirmed that p-methyl mercaptan and hydrogen sulfide showed sufficient deodorizing properties. In addition, the more iodine pentoxide content, the higher the deodorizing properties, but it was also shown that the deodorizing properties were exerted in the low concentration range of less than 0.001 mol / L.

[0189] Table 8 shows the results of deodorization tests on various malodorous gases using deodorant solutions 1 and 12 to 14 (containing 0.009 mol / L of iodine pentoxide).

[0190] [Table 8]

[0191]

[0192] For methyl mercaptan, hydrogen sulfide, trimethylamine, and ammonia, even if a pH adjuster is added to adjust the pH to a safe neutral region, sufficient deodorizing properties are exhibited. In addition, for acetaldehyde, deodorizing properties are improved by increasing the pH.

[0193] Table 9 shows the results of the deodorization test on acetaldehyde of deodorant solutions 12 to 23 (containing 0.009 mol / L of diiodine pentoxide and adding a pH adjuster).

[0194] [Table 9]

[0195]

[0196] When any pH adjuster is used, the deodorization property against acetaldehyde increases as the pH increases. This effect is stronger when an amine compound having a primary amino group such as triethylenetetramine (TETA), tris(hydroxymethyl)aminomethane (THMAM), or 3-amino-1,2-propylene glycol (AMPD) is added than when triethanolamine (TEA) is added.

[0197] Industrial Applicability

[0198] The deodorant solution of the present invention can exert a deodorizing effect on various malodorous components (especially hydrogen sulfide, methyl mercaptan, ammonia, trimethylamine, and acetaldehyde, which are known as the five major malodors). Therefore, it is widely used in pulp mills, chemical plants, animal fat plants, sewage treatment plants, garbage treatment plants, petrochemical plants and other factories / business premises as well as in ordinary households to counter odors.

Claims

1. A deodorant solution, characterized in that One or more iodine compounds selected from the group consisting of iodine oxides, iodine oxyacids and iodine oxyacid salts are dissolved in an aqueous solvent, and an amine compound is further contained as a pH adjuster, and the pH is 7 to 9.

8.

2. The deodorant solution according to claim 1, wherein The iodine compound is one or more iodine compounds selected from the group consisting of iodine pentoxide, iodic acid, periodic acid, iodous acid, hypoiodous acid, iodates, periodates, iodites, and hypoiodites.

3. The deodorant solution according to claim 1, wherein The aqueous solvent is water.

4. The deodorant solution according to claim 1, which is a solution for deodorizing mercaptan-based malodors.

5. The deodorant solution according to claim 1, which is a solution for deodorizing ammonia or amine-based malodors.

6. The deodorant solution according to claim 1, which is a solution for deodorizing aldehyde-based malodors.

7. The deodorant solution according to any one of claims 1 to 6, wherein The amine compound is an amine compound having a primary amino group.

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