Environmentally friendly solvents and washing compositions containing them, washing devices

Abstract

The washing composition according to the present invention is characterized by comprising a solvent selected from the group consisting of acetone glycerol and its derivatives, and a fragrance having a log P value of -1.0 to 4.5. The washing apparatus is characterized by comprising a washing section that receives the solvent and washes the contained fibers; a steam recovery section that condenses the gas phase discharged from the washing section and supplies it to a solvent recovery section; and a solvent recovery section that recovers the liquid phase discharged from the washing section and supplies it to a solvent supply section, wherein the solvent recovery section comprises: a filtration section that removes impurities from the solvent supplied from at least one of the steam recovery section and the washing section; and a solvent storage section that stores the solvent supplied from the filtration section.

Description

Technical Field

[0001] This invention relates to environmentally friendly solvents, washing compositions containing the same, washing apparatuses utilizing the same, and more specifically, to washing compositions that reduce wrinkling of fibers by further including a specific fragrance in a solvent containing acetone glycerol, and washing apparatuses that can be reused to prevent the decomposition of the solvent. Background Technology

[0002] Generally, washing to remove stains from fibers or clothing can be divided into two categories: dry cleaning, which removes stains by dispersing surfactants in water or by dissolving stains in solvents. Washing methods using water and surfactants are effective at removing water-based stains, but have limitations in removing oil-based stains. Dry cleaning is suitable for washing fibers or clothing that are not suitable for washing processes involving strong dehydration, and is suitable for situations where organic solvents are used to remove oil-based stains.

[0003] Traditionally, dry cleaning primarily utilizes petroleum-based or chlorinated solvents. Petroleum-based solvents employ hydrocarbons with 10 or more carbon atoms, more specifically, hydrocarbons with 10 to 13 carbon atoms. Petroleum-based solvents offer advantages such as strong cleaning power against oily stains, high volatility, and easy drying; however, their low boiling points and high vapor pressures pose fire and explosion hazards, and their release into the environment can lead to VOC pollution. Chlorinated solvents utilize compounds such as tetrachloroethylene (PERC), which consists of two carbon atoms bonded by double bonds and four chlorine atoms. Chlorinated solvents offer advantages such as strong cleaning power against oily stains, high volatility, and low explosion hazard; however, they have been reported to be potentially carcinogenic to humans. Currently, the use of petroleum-based and chlorinated solvents is gradually being restricted.

[0004] To address the problem of the existing variety of solvents, various solvents such as glycol ether series solvents, bromine-containing solvents, and silicone oil-containing solvents have been developed. Alternative solutions such as dry cleaning methods using liquefied carbon dioxide and wet washing methods that remove contaminants using only a small amount of water have also been disclosed.

[0005] Ethylene glycol ether solvents have attracted attention for their superior detergency compared to petroleum-based hydrocarbon solvents, but their relatively low volatility leads to longer drying times and higher energy consumption. Bromine-containing solvents, such as n-bromopropane or 1-bromopropane, are non-flammable; however, they have been reported to cause environmental pollution when released, and can cause contact irritation or serious illnesses when inhaled for extended periods. Recent animal studies have suggested that silicone oil may cause cancer, leading to restrictions on its use. Dry cleaning methods using liquefied carbon dioxide require expensive equipment and pose an explosion hazard, as they utilize pressures exceeding 600 psi to liquefy carbon dioxide. Wet cleaning methods suffer from fiber shrinkage and deformation caused by water.

[0006] Recently, a solvent containing a compound of the following chemical formula 1 has been disclosed for the washing of fibers. It is reported that the solvent has the advantages of being safe for human body and environment, having strong washing power against pollution, low explosion risk, and being quick and easy to dry.

[0007] [Chemical Formula 1]

[0008]

[0009] In chemical formulas,

[0010] R1 and R2 are independent straight-chain or branched alkyl groups with 1 to 4 carbon atoms.

[0011] R3 is a straight-chain or branched alkyl group having 1 to 4 carbon atoms.

[0012] In chemical formulas,

[0013] R1 and R2 are straight-chain or branched alkyl groups with 2 to 4 carbon atoms that can be linked together to form cycloalkyl groups.

[0014] Unlike petroleum-based, chlorine-based, or silicone-containing solvents, the compounds of Formula 1 described above are also soluble in water. Therefore, they are reportedly suitable not only for dry cleaning but also for washing with water.

[0015] Although less than petroleum-based and chlorine-based solvents, the solvent of Formula 1 still leaves an odor on the fibers after washing. Furthermore, the compound of Formula 1 has the problem that when water is used in the washing process or mixed with water contained in the fibers, it decomposes into glycerol and acetone when exposed to acidic conditions, making it difficult to recycle and reuse.

[0016] [Preliminary Technology Documents]

[0017] [Patent Documents]

[0018] (Patent Document 1) Korean Patent Registration No. 10-1128856 (Published on March 14, 2012)

[0019] (Patent Document 2) Korean Patent Publication No. 10-2014-0073597 (Published on June 17, 2014)

[0020] (Patent Document 3) Korean Patent Publication No. 10-2017-0082444 (Published on July 14, 2017) Summary of the Invention

[0021] Technical problems to be solved

[0022] The present invention was made to solve the problem of washing compositions containing the compound of the above-mentioned chemical formula 1 as a solvent. The object of the present invention is to provide a washing composition in which a fragrance having a specific logP value is further added, thereby reducing the odor of the compound of the above-mentioned chemical formula 1 and reducing the formation of wrinkles in the fibers after washing.

[0023] This invention was made to solve the problem of using the compound of the above chemical formula 1 as a solvent for washing. Another object of this invention is to provide a washing apparatus that recovers the solvent used, removes water from the solvent, thereby preventing the decomposition of the above compound and enabling its reuse.

[0024] means of solving technical problems

[0025] The washing composition according to Example 1 of the present invention is characterized in that it comprises a solvent expressed by the following chemical formula 1 and a fragrance, wherein the fragrance has a log P value of -1.0 to 4.5.

[0026] [Chemical Formula 1]

[0027]

[0028] In chemical formulas,

[0029] R1 and R2 are independent straight-chain or branched alkyl groups having 1 to 4 hydrogen or carbon atoms.

[0030] R3 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

[0031] Specifically, in the above chemical formula 1, R1 and R2 are straight-chain or branched alkyl groups with 2 to 4 carbon atoms, which can be connected to each other to form cycloalkyl groups.

[0032] Specifically, in the above chemical formula 1, R1 and R2 can be methyl groups, and R3 is hydrogen.

[0033] Specifically, the aforementioned fragrance may contain one or more compounds selected from the group consisting of vanillin, resorcinol, 2,4-dihydroxy-3,6-dimethylbenzoic acid, geraniol, benzyl benzoate, and 2-ethylhexene.

[0034] Specifically, the fragrance may contain 0.0001 to 30% by weight relative to 100% by weight of the washing composition.

[0035] Specifically, the aforementioned washing composition may be a liquid composition that further comprises one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, enzymes, preservatives, and viscosity modifiers.

[0036] Furthermore, a method for washing fibers is characterized by utilizing a washing composition according to Embodiment 1 of the present invention.

[0037] According to Embodiment 2 of the present invention, the washing apparatus is characterized in that it includes: a washing section that receives solvent and washes the contained fibers; a steam recovery section that condenses the gas phase discharged from the washing section and supplies it to a solvent recovery section; and a solvent recovery section that recovers the liquid phase discharged from the washing section and supplies it to a solvent supply section, wherein the solvent recovery section includes: a filtration section that removes impurities from the solvent supplied by at least one of the steam recovery section and the washing section; and a solvent storage section that stores the solvent supplied from the filtration section.

[0038] Specifically, the steam recovery section may include: a steam intake section that recovers the steam generated in the washing section; and a steam condensation section that allows the steam and water supplied from the steam intake section to exchange heat.

[0039] Specifically, the solvent storage unit may include: a solvent storage tank that supplies solvent to the solvent supply unit; and a sensor unit that measures the moisture content contained in the solvent storage tank.

[0040] Specifically, the solvent storage tank may include an adsorption box detachably disposed inside the solvent storage tank, wherein the adsorption box contains at least one of activated carbon, charcoal, silica gel, alumina gel, sulfuric acid, activated clay, zeolite, and bentonite.

[0041] Specifically, the aforementioned sensor unit can use at least one of conductivity, pH concentration, hue, viscosity, and ultraviolet light to measure the moisture content inside the solvent storage tank.

[0042] Specifically, the solvent recovery unit may further include a moisture removal unit equipped with a permeation membrane, which is a permeation evaporation membrane, a hollow fiber membrane, or a reverse osmosis membrane. The moisture removal unit supplies the solvent that has passed through the permeation membrane to the solvent supply unit or the solvent storage unit.

[0043] Specifically, the aforementioned moisture removal section may include an adsorption box detachably disposed inside the moisture removal section, the adsorption box being configured to contact the solvent that has passed through the aforementioned permeation membrane.

[0044] Specifically, the aforementioned moisture removal section may include a second sensor section that measures the moisture content contained within the aforementioned moisture removal section.

[0045] Specifically, the washing apparatus may further include: a solvent return line that supplies solvent stored in the solvent storage tank to the moisture removal unit; a solvent return valve provided on the solvent return line for regulating the solvent supply flow rate; and a control unit that adjusts the opening of the solvent return valve based on the moisture content measured in at least one of the sensor unit and the second sensor unit.

[0046] Specifically, when the moisture content measured by the aforementioned sensor unit is greater than a predetermined first reference value or the moisture content measured by the aforementioned second sensor unit is less than a predetermined second reference value, the aforementioned control unit may open the aforementioned solvent return valve or increase its opening degree.

[0047] Specifically, the solvent may contain a compound expressed as Chemical Formula 1 below.

[0048] [Chemical Formula 1]

[0049]

[0050] In chemical formulas,

[0051] R1 and R2 are independent straight-chain or branched alkyl groups having 1 to 4 hydrogen or carbon atoms.

[0052] R3 is a straight-chain or branched alkyl group having 1 to 4 carbon atoms.

[0053] Specifically, in the above compounds, R1 and R2 are straight-chain or branched alkyl groups with 2 to 4 carbon atoms that are independently linked together to form cycloalkyl groups.

[0054] Invention Effects

[0055] The washing composition according to the present invention uses acetone glycerol and its derivatives as solvents, which are environmentally friendly and safe for the human body, compared with petroleum-based and chlorinated solvents. It further contains fragrance along with the solvents, thereby reducing the odor of the solvents.

[0056] Compared to washing compositions that use acetone glycerol and its derivatives as solvents, the present invention uses a fragrance with a specific log P value, thereby reducing wrinkles in fibers after washing.

[0057] According to the washing apparatus of the present invention, solvent can be recovered and reused from the gas and liquid phases generated after washing fibers with solvent.

[0058] Furthermore, the washing apparatus according to the present invention removes moisture from the recovered solvent, thereby preventing solvent decomposition. Attached Figure Description

[0059] Figure 1 This is a conceptual diagram of an existing washing device.

[0060] Figure 2 This is a conceptual diagram of a washing device according to Embodiment 2-1 of the present invention.

[0061] Figure 3 This is a conceptual diagram of a washing device according to Embodiment 2-2 of the present invention.

[0062] Figure 4 This is a conceptual diagram of a washing device according to embodiments 2-3 of the present invention.

[0063] Figure 5 This is a conceptual diagram of a washing device according to embodiments 2-4 of the present invention.

[0064] Figure 6 This is a conceptual diagram of a washing device according to embodiments 2-5 of the present invention.

[0065] Figure 7 This is a conceptual diagram illustrating a moisture removal section included in a washing apparatus according to an embodiment of the present invention. Detailed Implementation

[0066] The objectives, specific advantages, and novel features of the invention will become clearer from the following detailed description and preferred embodiments in conjunction with the accompanying drawings. In this specification, the same reference numerals are used to label the constituent elements of the various drawings, even when shown in different drawings. Furthermore, in describing the invention, detailed descriptions of related well-known technologies are omitted when it is determined that such detailed descriptions may obscure the spirit of the invention.

[0067] Below, the expressions for high temperature, low temperature, high pressure, and low pressure are relative and do not represent absolute values.

[0068] In the following, fiber refers to the object to be washed, i.e. the laundry, of the washing apparatus according to an embodiment of the present invention, and refers to clothing, general merchandise, bedding and other products containing fibers.

[0069] In the following, solvent refers to a mixture containing compounds expressed as Chemical Formula 1 below.

[0070] [Chemical Formula 1]

[0071]

[0072] In chemical formulas,

[0073] R1 and R2 are independent straight-chain or branched alkyl groups having 1 to 4 hydrogen or carbon atoms.

[0074] R3 is a straight-chain or branched alkyl group having 1 to 4 carbon atoms.

[0075] In the above chemical formula, R1 and R2 are straight-chain or branched alkyl groups with 2 to 4 carbon atoms, which can be linked together to form cycloalkyl groups.

[0076] In the above chemical formula, R1 and R2 can be alkyl groups with 1 carbon atom; or alkyl groups with 1 carbon atom and 2 carbon atom respectively; or alkyl groups with 1 carbon atom and 3 carbon atom respectively; or alkyl groups with 1 carbon atom and 4 carbon atom respectively. The alkyl groups with 4 carbon atom can include branched alkyl groups.

[0077] For example, in the above chemical formula, R1 and R2 can be methyl, and R3 can be hydrogen. Alternatively, in the above chemical formula, R1 can be ethyl, propyl, or isobutyl, R2 can be methyl, and R3 can be hydrogen. Preferably, in the above chemical formula, R1 and R2 can be methyl, and R3 can be hydrogen.

[0078] In addition to compounds according to Formula 1 above, solvents may also include surfactants, bleaching agents, brighteners, anti-dyeing agents, fragrances, preservatives, etc., and may also contain small amounts of water. Vapors include gaseous phases of such solvents vaporized or substances comprising particulate matter.

[0079] Below, the washing composition may be a dry cleaning composition for fibers or a liquid composition.

[0080] The washing composition according to Example 1 of the present invention comprises a solvent expressed as Chemical Formula 1 above and a fragrance, wherein the fragrance may be a fragrance with a log P value of -1.0 to 4.5.

[0081] In the following, "fragrance" refers to one or more compounds that emit fragrance when used with the solvent of the present invention in the washing composition and in fibers washed using the washing composition described above.

[0082] Specifically, in this invention, a fragrance with a log P value of -0.1 to 4.5 is used. As the fragrance is left on the fibers, the odor of the solvent can be reduced in the washed fibers, and the persistence of the fragrance in the washed fibers can be improved.

[0083] Furthermore, the fragrance with the log P value described above remains on the washed fibers, preventing wrinkles from forming. During the washing process, in addition to contact with the washing composition, there is also a process of removing contaminants using mechanical force, which may cause temporary deformation of the fibers. This varies depending on the type of material constituting the fiber, but the fiber may be composed of molecules containing hydrophilic functional groups in at least a portion of its surface. These hydrophilic functional groups generate intermolecular forces, including hydrogen bonds, between adjacent hydrophilic functional groups or between water or hydrophilic molecules that come into contact during washing. These intermolecular forces exert a relatively strong effect when the fiber deforms, potentially leading to wrinkles. According to the fragrance of the present invention, the fragrance with the log P value described above remains on the fiber, maintaining the fiber surface on a relatively oleophilic surface, reducing the intermolecular forces constituting the fiber, thereby preventing the formation of fiber wrinkles.

[0084] Below, P is the fractionation factor, which can represent the solubility of a compound in two solvents; specifically, it can be the octanol-water fractionation factor. For example, P can be the ratio of the solubility of a compound in octanol to the solubility of a compound in water. When the compound is lipophilic, the P value can be very large and can be expressed as log P.

[0085] The fragrance can be an organic compound with a unique aroma, and is not limited to aromatic compounds; fragrances with a log P value of -0.1 to 4.5 can be used. When the log P value of the fragrance is below -1.0, it rapidly disperses from the washing composition or the surface of the fibers washed with the washing composition, resulting in a rapid reduction of the fragrance on the fiber surface. When the log P value of the fragrance is above 4.5, the compatibility with the solvent of the present invention is rapidly reduced, and fragrance and solvent separation occurs in the washing composition. That is, the fragrance used in the present invention can be one or more compounds that dissolve in octanol at a ratio of about 0.8 to 30,000 times compared to water.

[0086] Preferably, the fragrance can be a fragrance with a log P value of 0.5 to 4.5; more preferably, a fragrance with a log P value of 0.7 to 4.5 can be used. Even more preferably, a fragrance with a log P value of 1.0 to 4.4 can be used; most preferably, a fragrance with a log P value of 2.0 to 4.4 can be used. The solvent according to the invention can have a log P value of about 1.07. Using a fragrance with a log P value similar to or relatively higher than the solvent and capable of maintaining compatibility with the solvent, thereby providing both excellent residue resistance to fibers and excellent compatibility of the composition itself after washing.

[0087] The fragrance can be selected from 2-tert-butylcyclohexyl acetate, (3-oxo-2-pentylcyclopentyl)acetic acid, (E)-4-decanal, 1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)ethanone, and 1-(2,6,6-trimethyl-1-cyclohexen-3-yl)but-2-en-1-one. 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1-penten-3-one, 1,2-dichloroethane, 1,3,3-trimethyl-2-oxabicyclo[2,2,2]octane, 1,4-dioxane, 1,6-hexanediol diglycidyl ether, 1,7,7-trimethylbicyclo[2.2.1]hept-2-ylacetate), 10-undecenal, 17α-hydroxyprogesterone, 1-bromoethane, 1-bromopentane, 1-butanol, 1-butene, 1-chlorohexane, 1-fluorooctane, 1-heptanol anol), 1-heptene, 1-hexanol, 1-hexene, 1-iodobutane, 1-methoxypropan-2-ol, 1-naphthol, 1-nonanol, 1-octanol, 1-octyne, 1-pentanol (1.56), 1- 1-pentene (2.80), 1-propanol (0.25), 2-(2-Butoxyethoxy)ethanol (0.65), 2-(dimethylamino)-5,6-dimethylpyrimidin-4-ol (1.63), 2-(ethoxycarbonyl)benzoic acid (1.80), 2,2,2-trichloro-1-phenylethanol, 2,3-butanediol, 2,4,6-trichlorophenol, 2,4-dichlorophenol, 2,4-dichlorophenoxyacetic acid 2,4-dihydroxy-3,6-dimethylbenzoic acid), 2,4-dihydroxy-3,6-dimethylbenzoic acid(acid), 2,4-dimethylcyclohex-3-ene-1-carbaldehyde, 2,6-dimethyl-2-heptanol, 2-butanol, 2-butanone, 2-butoxyethanol, 2-butyne, 2-chlorophenol, 2-cresol, 2-decanone, 2-ethoxyethanol ethanol), 2-ethyl-1-hexanol, 2-ethylhexene, 2-heptanone, 2-hexanol, 2-hexanone, 2-hexen-1-ol, 2-hydroxybenzoic acid acid), 2-iodobutane, 2-isopropoxyethanol, 2-isopropoxyphenol, 2-MeTHF, 2-methoxy-4-(2-propenyl)-phenol, 2-methoxy-4-propylphenol, 2-methoxy-4-vinylphenol, 2-methoxyethanol, 2-methoxyethyl acetate. acetate), 2-methyl-1-butanol, 2-methyl-1-propanol, 2-methyl-2-butanol, 2-methyl-2-pentanol, 2-methyl-2-propanol, 2-methylbutyl acetate, 2-methylbutyric acid, 2-methylpropane, 2-methylpropionic acidacid), 2-naphthol, 2-naphthylamine, 2-nitro-4-phenylenediamine, 2-nonanone, 2-octanone, 2-octyne, 2-pentanone, 2-Phenoxyethanol, 2-phenyl-1-ethanol, 2-phenylphenol, 2-propanol, 2-undecanone, 3(4)-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde (3 and 4-(4-Hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde, 3-(4-tert-butylphenyl)-2-methylpropanal (Lilial), 3,4-dimethylphenol (3,4-Xylenol), 3,7-dimethyloct-6-en-1-ol (3,7-Dimethyloct-6-en-1-ol), 3,7-dimethyloct-2 3,7-dimethylocta-2,6-dienal, 3,7-dimethyloctan-3-ol, 3-methylphenol, 3-hexanol, 3-hexanone, 3-methyl-1-butanol, 3-methyl-3-pentanol, 3-methylbutyl acetate, 3-methylbutyric acid, 3-nitrophenol, 3-phenylbutanalbutanal), 3-phenyl-1-propanol, 4-(2,6,6-trimethyl-1-cyclohexene-1-yl)-3-butene-2-one, 4-(methylthio)-3,5-xylenol, 4-acetamidophenol, 4-amino-2-nitrophenol, 4-aminobenzoic acid 4-Aminophenol, 4-Bromophenol, 4-Chloro-3-xylenol, 4-Chlorocresol, 4-Chlorophenol, 4-Cresol, 4-Cyanophenol, 4-ethoxy-4-oxobut-2-enoic acid, 4-Ethylphenol, 4-Heptyloxyphenol, 4-Iodophenol, 4-Methoxyacetophenone, 4-Methoxybenzyl alcohol, 4-methylpentanoic acid 4-Nitroaniline, 4-Nitrophenol, 4-Pentyloxyphenol, 5-Fluorouracil, 5-Hexyloxolan-2-one, acetaldehyde, acetic acid, acetone, acetonitrile, acetophenone, acetyl cedrene, acetylcysteine, acetylsalicylic acid, allyl alcohol, allylheptanoate, alpha-terpineolterpineol), amobarbital, amyl alcohol, amyl salicylate, androstenedione, anethole USP, aniline, α-terpineol, atrazine, atropine, azodrin, barbital, benzaldehyde, benzene, benzocaine, benzoic acid, benzoic acid, 2-amino-,dihydrochloride, benzophenone, benzyl acetate, benzyl alcohol, benzyl benzoate, benzyl nicotinate, benzyl salicylate, β-terpineol terpineol, β-estradiol, boric acid, butachlor, butobarbital, butyl 4-hydroxybenzoate, butyl acetate, butyl alcohol, butyl nicotinate, butyraldehyde, butyric acid, caffeine, carbamic acid, carvone, catechol, chloramphenicol, chlorocresol, chloroform, chloroxylenol, chlorpheniramine maleate, cinnamic acid, cinnamic aldehyde, cinnamyl alcohol alcohol), cinnamylalcohol), cinnamylanthranilate, cis-1,3-dichloropropene, cis-3-hexenyl acetate, cis-6-nonenal, cis-jasmone, codeine, cortexone, coumarin, cumene, cyclododecanone, cyclohexane, cyclohexanone, cyclopentanone, cycloundecanone, decanal, decanoic acid acid), deoxycorticosterone, diisopropyl fluorophosphate (DFP), dehydroepiandrosterone (DHEA), diazinon, dichloromethane, diclofenac, diethyl ether, diethyl maleate, diethyl malonate, diethyl phthalate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethyl ether, dihydrolinalool, dihydromyrcenol, dihydro-α-terpineol, dimethoate, dimethyl benzyl carbinyl acetate, dimethyl carbonate Carbonate, dimethylcyclohexanol, dimethylethylamine, dimethylformamide, dimethylnitrosamine, dinitrochlorobenzene, diphenyl ether, dipropylene glycol methyl ether(The following are listed as compounds and their components: glycolmethyl ether), citronellol (d-Citronellol), d-Limonene, dimethyl pyridyl ester (DMP), (E)-2-butenal (E-2-butenal), (E)-2-hexenal (E-2-hexenal), (E)-2-octene (E-2-octene), ethylene glycol, ephedrine, estradiol, estragole, estriol, estrone, ethane, ethanol, ethyl acetate, ethylbenzene, ethyl ether, ethylhydrogen malonate, ethyl nicotinate, ethyl vanillin, ethylbenzene, ethylene glycol methyl ether) ether), ethynylbenzene, eucalyptol, eugenol, eugenylmethyl ether, fludrocortisone acetate, flutamide, geraniol, geranyl nitrile, glycerol formal, hedione, heptanal, heptane, heptanoic acid, heptanol, hexanal, hexanoic acid, hexanol, hippuric acid, hydrochloric acid, hydroxycitronellal, ibuprofen, indole, iodomethane, isoeugenol Isobutyl isobutyrate, isobutyl salicylate, isoeugenol, isopentyl isopentyl isovalerateisovalerate, isoquinoline, koavone, lactic acid, liffarome, linalool, lindane, malathion, maleic acid, malonic acid, 4,4'-methylenebis(2-chloroaniline) (MbOCA), m-cresol, MDA, meperidine, mesitylene, methanol, methiocarb, methyl 2-(3-oxo-2-pentylcyclopentyl)acetate, methyl 2-nonynoate, methyl acetate, methyl anthranilate, methyl atrazoate Methyl benzoate, methyl beta-naphthyl ketone, methyl dihydrojasmonate, methyl isobutyl ketone, methyl N-methylanthranilate, methyl nicotinate, methyl propionate, methyl salicylate, methyl tert-butyl ether, methyl-4-hydroxybenzoate, methyl-4-OHbenzoate, methyl parathion, methyl salicylate, morphine, and musk.ketone), m-xylene, N,N-diethyl-m-toluamide, naproxen, n-butane, n-butanol, n-decanol, nerol, n-heptane, n-heptanol, n-hexane, n-hexanol, N-hexyl nicotinate, nicotinamide, nicotine, nicotinic acid, nitrobenzene, nitroglycerin, N-methylpyrrolidone pyrrolidone), N-methylcarbamate, n-nonanol, n-octanol, nonalactone, nonanoic acid, n-pentane, n-Pentanol, N-Phenyl-2-naphthylamine, n-Propanol, n-Propoxyethanol, o-chlorotoluene, o-Cresol, o-cresyl glycidyl ether, octanal, octanic acid, octanol, orange flower ether phenyl ethyl Acetate, o-toluidine, o-xylene, paraoxon, parathion, p-cresol, pentanoic acid, pentanol, phenethyl alcohol, phenobarbital, phenol, phenoxanol, phenoxyethyl isobutyrate, phenylethyl alcohol, phenylpropanolalcohol, phenylethyl alcohol, phosmet, phoxim, phthalic acid, pirimicarb, pregnenolone, progesterone, prop-2-enyl heptanoate, propane, acrolein, propene, propionaldehyde, propionic acid, propoxur, propranolol, propyl acetate, propyl butyrate, propyl formate, propylene carbonate, propylene glycol, pt-Butyl-α-methylhydrocinnamic acid aldehyde), p-Xylene, pyridine, resorcinol, safrole, salicylic acid, scopolamine, styrene, terpinen-4-ol, tert-butanol, testosterone, tetrahydrofuran, tetrahydrolinalool, theophylline, thymol, toluene, triacetin, trichloromethane, trichloromethyl phenyl carbinyl acetate, triclopyr, tricyclodecenyl acetate Acetate, triethanolamine, trifluoroacetic acid, trimethylamine, undecanoic acid, valeric acidOne or more compounds selected from the group consisting of 2,4-dihydroxy-3,6-dimethylbenzoic acid, geraniol, benzyl benzoate, and 2-ethylhexene, preferably one or more compounds selected from the group consisting of 2,4-dihydroxy-3,6-dimethylbenzoic acid, geraniol, benzyl benzoate, and 2-ethylhexene.

[0088] The washing composition according to this embodiment may contain 0.0001 to 30% by weight of fragrance relative to 100% by weight of the washing composition. When the fragrance content is less than 0.0001% by weight, the odor-reducing effect in the solvent decreases rapidly. When the fragrance content is greater than 30% by weight, the stain-removing effect of the solvent on the fibers decreases rapidly.

[0089] The washing composition according to this embodiment may further include one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, detergent aids, stabilizers, enzymes, preservatives, dyes, viscosity modifiers, metal ions, chelating agents, fatty acids, thickeners, and pH adjusters, without hindering the purpose of the present invention.

[0090] Monohydric alcohols, polyhydric alcohols, etc., can be used as organic solvents. For example, an organic solvent can be an alcohol having 1 to 4 carbon atoms, and can be one or more selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol, and glycerol, but is not limited to this.

[0091] Surfactants can be cationic, anionic, amphoteric, or nonionic surfactants, which can improve the detergency and stability of detergent compositions targeting specific contaminants. For example, cationic surfactants can be one or more selected from the group consisting of ester quaternary ammonium salts, benzalkonium chloride, methyl triethyl ammonium chloride (TEACI), imidazoline derivatives, etc.; anionic surfactants can be one or more selected from the group consisting of soaps, alkylbenzene sulfonates, alkane sulfonates, alpha olefin sulfonates, α-sulfo fatty acid methyl esters, alkyl sulfates, alkyl ether sulfates, etc.; amphoteric surfactants can be one or more selected from the group consisting of alkyl betaines, alkyl sulfobetaines, etc.; nonionic surfactants can be one or more selected from the group consisting of alcohol ethoxylates, alkylphenol polyoxyethylene ethers, alkylamine oxides, glucosamine, alkyl glycosides, etc., but are not limited to these.

[0092] The type of electrolyte is not particularly limited, and electrolytes used in this field can be used without restriction. Electrolytes improve the solubility stability of other additives, including surfactants, in the detergent composition, thereby enhancing the detergency of the detergent composition. For example, the electrolyte can be a salt of an organic or inorganic acid, which can be one or more salts selected from the group consisting of chlorides, bromides, iodides, acetates, bicarbonates, phosphates, citrates, sulfates, polyphosphates, pyrophosphates, triphosphates, tetraphosphates, silicates, metasilicates, polysilicates, carbonates, hydroxides, alkali metal salts, etc.

[0093] Enzymes can enhance the washing power against specific contaminants. For example, specific contaminants may include proteins, and the enzyme may be one or more selected from the group consisting of proteases, lipases, amylases, etc., but is not limited to these.

[0094] Preservatives prevent the deterioration of the detergent composition and may be, for example, one or more of the group consisting of ethanol, phenoxyethanol, benzisothiazolinone, methylchloroisothiazolinone, methylisothiazolinone, Fentin diols, parahydroxybenzoates, sodium benzoate, etc., but are not limited thereto.

[0095] The viscosity modifier may be a thickener, and may be one or more of the group consisting of inorganic salts, hydroxyethyl cellulose, xanthan gum, fatty acid alkanolamides, etc., used in the art.

[0096] Furthermore, bleaching agents, dyes, pH adjusters, bubble regulators, and other ingredients may be used alone or in combination without hindering the purpose of the present invention, but are not limited thereto.

[0097] This invention provides the use of the composition according to Example 1. Specifically, this invention provides the use of a composition comprising a solvent expressed in Chemical Formula 1 and a fragrance as a washing composition.

[0098] Furthermore, the present invention provides a method for treating fibers or products containing the same using a detergent composition comprising a solvent expressed in Chemical Formula 1 and a fragrance. Specifically, the present invention provides a method for washing fibers or products containing the same by contacting a detergent composition comprising a solvent expressed in Chemical Formula 1 and a fragrance with the same, a method for dry cleaning, a method for removing stains, or a method for removing impurities.

[0099] The following describes more specific embodiments of the washing composition of the present invention.

[0100] Example 1. A detergent composition comprising a solvent and a fragrance

[0101] Using acetone glycerol (solketal), in which R1 and R2 are methyl and R3 is hydrogen, as the compound according to Chemical Formula 1, a wash composition containing fragrances according to Table 1 below was prepared.

[0102] In the examples, fragrances with log P values ​​of approximately 0.7 to 4.3 were used. In Comparative Examples 1-1, only solvent was used without fragrance. In Comparative Examples 1-2, fragrances with log P values ​​below -1.0 were used. In Comparative Examples 1-3, fragrances with log P values ​​above 4.5 were used. Except for Comparative Example 1-1, which used only solvent, in the following examples and comparative examples, in order to confirm the effects of solvent and fragrance, the composition contained 95% by weight of solvent and 5% by weight of fragrance relative to 100% by weight of the total washing composition.

[0103] Table 1

[0104]

[0105] Experimental Example 1-1. Evaluation of the off-odor of acetone glycerol and the fragrance of the perfume in the fibers after washing.

[0106] The fibers were washed using the washing compositions according to embodiments of the present invention and comparative examples. After the fibers were dried, the off-odor of acetone glycerol as a solvent and the fragrance of the fragrance were evaluated. The results are shown in Table 2 below.

[0107] The odor of acetone glycerin and the aroma it imparts were evaluated by the intensity of the lingering aroma. The average value was calculated after 15 aroma evaluators evaluated the product (5 points: very strong, 4 points: strong, 3 points: average, 2 points: weak, 1 point: very weak).

[0108] Table 2

[0109] The odor of acetone glycerol fragrance Example 1-1 3.0 3.2 Examples 1-2 2.7 3.7 Examples 1-3 2.3 4.0 Examples 1-4 2.2 4.2 Examples 1-5 1.7 4.2 Examples 1-6 1.5 4.3 Comparative Example 1-1 4.8 - Comparative Examples 1-2 4.5 1.7 Comparative Examples 1-3 4.5 1.9

[0110] The evaluation results show that when using the washing composition according to the embodiments, as the log P value of the included fragrance increases, the odor of acetone glycerol in the fibers decreases after washing. However, in Comparative Examples 1-2 with log P values ​​below -1.0 and Comparative Examples 1-3 with log P values ​​above 4.5, the degree of odor reduction decreases rapidly, reaching a level similar to that of Comparative Example 1-1 without fragrance alone.

[0111] Similarly, it can be seen that when using the washing composition according to the embodiments, as the log P value of the contained fragrance increases, the fragrance in the fibers is enhanced after washing, but when using the fragrances according to Comparative Examples 1-2 and 1-3, the fragrance is at a very weak level.

[0112] This is because when the fragrance used in the detergent composition is an oleophilic fragrance with a relatively high log P value, the residue left on the fibers during washing will not be rinsed off, thereby reducing the odor of acetone glycerol or allowing the fragrance to develop. In Comparative Examples 1-3, because the fragrance's log P value was too high, the solvent and fragrance were used separately in the detergent composition, resulting in a relatively large amount of acetone glycerol remaining on the fiber surface.

[0113] Experimental Example 1-2. Evaluation of the degree of wrinkle formation in fibers after washing

[0114] The fibers were washed using washing compositions according to embodiments of the present invention and comparative examples, and the degree of wrinkle formation was evaluated after drying the fibers. The results are shown in Table 3 below.

[0115] The degree of wrinkling of the fibers after washing was evaluated based on a composite satisfaction assessment of visual and tactile factors. The average score was calculated after evaluating 15 fiber evaluation monitors (5 points: very satisfied, 4 points: satisfied, 3 points: average, 2 points: dissatisfied, 1 point: very dissatisfied).

[0116] Table 3

[0117] Pleated satisfaction Example 1-1 3.7 Examples 1-2 3.7 Examples 1-3 3.9 Examples 1-4 4.0 Examples 1-5 4.3 Examples 1-6 4.3 Comparative Example 1-1 2.3 Comparative Examples 1-2 1.8 Comparative Examples 1-3 2.7

[0118] The evaluation results show that when using the washing composition according to the embodiments, as the log P value of the contained fragrance increases, the amount of wrinkles formed in the fibers after washing is less, resulting in higher satisfaction. However, in Comparative Examples 1-2 with log P values ​​below -1.0 and Comparative Examples 1-3 with log P values ​​above 4.5, the amount of wrinkles is actually greater.

[0119] This is because when the fragrance used in the detergent composition is an oleophilic fragrance with a relatively high log P value, it remains on the fiber surface, reducing the intermolecular attraction on the fiber surface. In Comparative Examples 1-3, as the log P value of the fragrance becomes too high, the solvent and fragrance separate in the detergent composition, and fragrance residue itself becomes more difficult to remove. As a result, the intermolecular attraction acts between the hydrophilic functional groups on the fiber surface, thus making it easier to form wrinkles.

[0120] Hereinafter, with reference to the accompanying drawings of the present invention, conventional washing apparatus and washing apparatus according to Embodiment 2 of the present invention will be described.

[0121] Figure 1 This is a conceptual diagram showing an existing washing device. (See reference...) Figure 1 Existing washing equipment includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, etc.

[0122] The washing section 10 has an internal space for accommodating fibers, into which solvent can be supplied to wash the fibers. The washing section 10 can receive solvent and then spray it onto the fibers or mix it with the fibers to remove contaminants. For example, the washing section 10 can first spray solvent onto the fibers and then supply a small amount of water, causing it to rotate and move together with the fibers, thereby removing contaminants. The fibers washed in the washing section 10 can be removed from the washing section 10, and after further removing contaminants by spraying steam, they can be dried.

[0123] The solvent supplied to the washing section 10 is mostly in the liquid phase, but fiber contamination is easily removed upon contact with a solvent at a higher temperature. Therefore, the solvent can be supplied to the washing section 10 heated to 30 to 60°C, or the fibers can be washed after being heated to a predetermined temperature by the washing section 10. Furthermore, as the washing section 10 rotates, at least a portion of the solvent can be vaporized or dispersed in the form of microparticles, and a portion of the water mixed in the solvent is also vaporized or dispersed in the form of microparticles and mixed, thereby forming steam. The washing section 10 can discharge the used solvent in both gaseous and liquid phases; the gaseous phase can be transferred to the steam recovery section 20 (described later), and the liquid phase can be transferred to the solvent recovery section 30 (described later).

[0124] Specifically, the washing unit 10 is connected to a steam intake line 11 and a solvent recovery line 12, which can discharge gaseous and liquid phases respectively. After washing, the steam intake line 11 can forcibly draw in the gaseous solvent in the washing unit 10 and supply it to the steam recovery unit 20. After washing, the solvent recovery line 12 can recover the liquid solvent in the washing unit 10 and supply it to the solvent recovery unit 30.

[0125] The steam recovery unit 20 may include a steam intake unit 21 for drawing in the gaseous solvent generated in the washing unit 10 and a steam condensation unit 22. The steam intake unit 21 is connected to the steam intake line 11 to generate negative pressure, thereby enabling the forced intake and recovery of the gaseous solvent generated in the washing unit 10. The steam condensation unit 22 condenses the steam recovered in the steam intake unit 21 into a liquid phase before transferring it to the solvent recovery unit 30. Specifically, the steam condensation unit 22 allows high-temperature steam to exchange heat with water, thereby cooling the steam and condensing it into a liquid phase. The solvent condensed in the steam condensation unit 22 can be supplied to the solvent recovery unit 30 via the steam recovery line 23.

[0126] The solvent recovery unit 30 may include a filter unit 31 for removing impurities contained in the solvent, a solvent storage unit 32 for storing the solvent supplied from the filter unit 31, etc.

[0127] The filter section 31 can accept liquid solvent discharged from the washing section 10 via the solvent recovery line 12. The filter section 31 may include packaging material, such as a mesh or diatomaceous earth, which allows the solvent to pass through while removing impurities mixed in the solvent for the first time. The solvent that has passed through the filter section 31 can be transferred to the solvent storage section 32 for storage.

[0128] The solvent storage section can be a solvent storage tank 32a, providing space for storing solvent discharged from the washing section 10. The solvent storage tank 32a can store solvent that has passed through the filtration section 31 and condensed solvent supplied from the steam recovery section 20. The solvent stored in the solvent storage tank 32a still contains contaminants derived from water and fibers, so at least a portion of the solvent can be hydrolyzed during the recovery process. Therefore, supplying the solvent stored in the solvent storage tank 32a to the washing section 10 for reuse may reduce washing efficiency. Therefore, the solvent storage tank 32a can be configured to be detachable from the washing apparatus to allow for solvent replacement and replenishment. The solvent storage tank 32a can be connected to the solvent supply section 34 via a solvent recovery line 33.

[0129] The solvent supply unit 34 can draw out the solvent stored in the solvent storage tank 32a and supply it to the washing unit 10. Specifically, the solvent supply unit 34 can use a pump to draw out the liquid solvent and supply it under pressure at a pressure suitable for spraying in the washing unit 10. Alternatively, a heating means can be further provided to heat the solvent to the temperature required by the washing unit 10 before supplying it.

[0130] According to such existing washing devices, the solvent used in the washing section is recovered and stored in the liquid phase before being supplied to the washing section again. In the solvent storage section, water and solvent mix, which causes solvent decomposition, resulting in a problem of reduced efficiency when reused.

[0131] Reference Figures 2 to 6 The washing apparatus 1 according to Embodiment 2 of the present invention is described.

[0132] Reference Figure 2 According to Embodiment 2-1 of the present invention, the washing device 1 includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, etc. The solvent recovery unit 30 includes a solvent storage tank 32a, an adsorption box 32b, and a sensor unit 35.

[0133] The following mainly describes Example 2-1 and... Figure 1 The differences between the existing washing devices shown are replaced with the above content for parts that are omitted in the description.

[0134] The washing unit 10 can accept solvent or the washing composition of the above embodiments to wash the fibers contained therein. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 through the steam recovery unit 20, and the liquid phase discharged from the washing unit 10 is supplied to the solvent recovery unit 30.

[0135] The solvent recovery unit 30 may include a filtration unit 31, a solvent storage unit 32, a solvent recovery line 33, and a solvent supply unit 34.

[0136] The filter section 31 can accept at least one of the liquid solvent discharged from the washing section 10 via the solvent recovery line 12 and the condensed solvent supplied from the steam recovery section 20 via the steam recovery line 23. The solvent forcibly drawn in via the steam intake section 21 may contain solvent particles and water, in addition to the gaseous solvent; these particles may contain fiber-derived contaminants. The filter section 31 can also remove impurities contained in the condensed solvent. The condensed solvent supplied from the steam recovery section 20 can be supplied to at least one of the filter section 31 and the solvent storage section 32.

[0137] The solvent storage unit 32 may include a solvent storage tank 32a, an adsorption box 32b, and a sensor unit 35, and may store the solvent that has passed through the filter unit 31 and the condensed solvent supplied from the vapor recovery unit 20.

[0138] The solvent storage tank 32a can be configured to be detachable from the washing device 1. At least a portion of the solvent stored inside the solvent storage tank 32a may evaporate naturally, so the solvent storage tank 32a can contain both liquid and gaseous solvents. The solvent storage tank 32a can supply liquid solvent to the solvent supply unit 34, which will be described later. The solvent storage tank 32a may include an adsorption box 32b and a sensor unit 35.

[0139] The adsorption box 32b can separate water mixed with the solvent stored inside the solvent storage tank 32a by adsorption. The adsorption box 32b can be removably disposed inside the solvent storage tank 32a. For example, the adsorption box 32b can be configured to be installed and removed from one side of the solvent storage tank 32a. Although not shown, the solvent storage tank 32a can be configured to allow at least a portion of its wall, such as a portion of the upper surface, to be opened, and the adsorption box 32b can be configured or replaced when the portion of the wall is opened.

[0140] The adsorption box 32b can separate water using at least one of physical adsorption and chemical adsorption methods. For example, the adsorption box 32b may include a protective sleeve with a mesh structure and packaging material filled inside the protective sleeve. The packaging material may be an adsorption material using physical adsorption methods, such as activated carbon, charcoal, silica gel, alumina gel, activated clay, zeolite, or bentonite; or an adsorption material using chemical adsorption methods, such as sulfuric acid or ion exchange resin that separates water from ions dissolved in water. At least a portion of the adsorption box 32b may be in contact with the solvent stored inside the solvent storage tank 32a. For example, the adsorption box 32b may be disposed on the inner wall of the solvent storage tank 32a, thereby being configured such that only a portion is immersed in the solvent.

[0141] The sensor unit 35 can measure the moisture content contained in the solvent storage tank 32a. Specifically, the sensor unit 35 can measure the moisture content contained in the liquid phase and gas phase solvent stored inside the solvent storage tank 32a.

[0142] Sensor unit 35 can measure the water content in the solvent stored inside solvent storage tank 32a using at least one of conductivity, pH concentration, hue, viscosity, and ultraviolet light. Sensor unit 35 can apply a small amount of electricity to the solvent and measure its conductivity, comparing it with the conductivity value of a pre-prepared pure solvent to output information about the water content in the solvent. Sensor unit 35 can measure the pH concentration of the solvent and compare it with the pH concentration value of a pre-prepared pure solvent to output information about the water content in the solvent. Sensor unit 35 can be a CCD (charge-coupled device) sensor, which can output information about the hue of the solvent. Sensor unit 35 can generate vibrations in the solvent using a piezoelectric vibrator and measure the frequency, comparing it with the frequency value of a pre-prepared pure solvent to output information about the water content in the solvent. Sensor unit 35 can irradiate the solvent with ultraviolet light and then confirm the presence of absorption wavelengths of water molecules from the reflected wavelength to output information about the water content.

[0143] Based on the information received from the sensor unit 35, the washing device 1 outputs information about the moisture content inside the solvent storage tank 32a to the user.

[0144] The solvent supply unit 34 can resupply the solvent recovered to the solvent storage unit 32 to the washing apparatus 1. The solvent supply unit 34 may be equipped with a pump, which can draw out the liquid solvent stored in the solvent storage tank 32a and pressurize it to the pressure required by the washing unit 10 before supplying it.

[0145] As described above, according to this embodiment 2-1, the solvent storage tank 32a of the solvent storage section 32 is equipped with an adsorption box 32b, which separates water from the solvent recovered from the washing section 10, thereby preventing solvent decomposition. The solvent storage tank 32a is equipped with a sensor 35, which can monitor the internal moisture content in real time, thereby determining the replacement time of the adsorption box 32b or the solvent storage tank 32a, and preventing a decrease in washing efficiency when the solvent is reused.

[0146] Reference Figure 3 According to Embodiment 2-2 of the present invention, the washing device 1 includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc. The solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0147] The following mainly explains the differences between this embodiment 2-2 and the above embodiment 2-1. The omitted parts are replaced by the above content.

[0148] The washing section 10 can accept solvent and wash the fibers contained inside. After washing, the gas phase discharged from the washing section 10 is supplied to the solvent recovery section 30 through the steam recovery section 20, and the liquid phase discharged from the washing section 10 can be supplied to the solvent recovery section 30.

[0149] The solvent recovery unit 30 may include a filtration unit 31, a solvent storage unit 32, a moisture removal unit 38, and a solvent supply unit 34. Liquid solvent discharged from the washing unit 10 can be stored in the solvent storage unit 32 after passing through the filtration unit 31. The solvent storage unit 32 is equipped with a sensor unit 35, which enables the measurement of the moisture content inside the solvent storage unit 32.

[0150] The moisture removal unit 38 can remove moisture from the liquid solvent supplied by the solvent storage unit 32. Specifically, the moisture removal unit 38 may be equipped with a permeable membrane that separates the solvent and water.

[0151] Figure 7 This is a conceptual diagram showing the internal structure of the moisture removal section 38. (See reference...) Figure 7 The moisture removal unit 38 may include a housing 38a that receives inflow stream A from the solvent recovery unit 30 and discharges outflow stream B. The moisture removal unit 38 has a permeable membrane 38c inside that is capable of separating solvent and water.

[0152] The permeation membrane 38c allows only water molecules W to permeate from a stream containing a mixture of solvent molecules S and water molecules W and then discharge it to the outside OUT. The permeation membrane 38c can be a pervaporation membrane, a hollow fiber membrane, or a reverse osmosis membrane. When the permeation membrane 38c is a reverse osmosis membrane, the water removal section 38 is located at the lower end of the solvent storage section 32, and water is separated using the pressure of the inflow stream A itself; alternatively, a pump that pressurizes the inflow stream A may also be included. Solvent molecules S that cannot permeate the permeation membrane 38c and a small amount of water molecules W can flow out from the water removal section 38 B.

[0153] The moisture removal unit 38 can supply the solvent that has passed through the permeation membrane 38c to the solvent supply unit 34. The outflow B can be transferred to the solvent supply unit 34 through the solvent recovery line 33.

[0154] The moisture removal section 38 may further include a second sensor section 35' for measuring the moisture content included within the moisture removal section 38. The second sensor section 35' may measure the moisture content within the moisture removal section 38 in the same manner as the sensor section 35 described above, and preferably measures the moisture content of the outflow B discharged from the moisture removal section 38.

[0155] The control unit 40 can receive information about the moisture content from at least one of the sensor unit 35 and the second sensor unit 35'. Based on the received information, the control unit 40 can monitor the internal conditions of the solvent storage unit 32 and the moisture removal unit 38 in real time, and can output the information through a display or speaker.

[0156] As described above, according to this embodiment 2-2, the solvent recovered from the washing unit 10 can be stored in the solvent storage unit 32 after passing through the filtration unit 31, and then supplied to the moisture removal unit 38, and supplied to the washing unit 10 in a state where water is separated through a permeation membrane. The solvent storage unit 32 and the moisture removal unit 38 are equipped with sensor units 35 and 35', which can monitor the internal moisture content in real time, thereby preventing a decrease in washing efficiency when the solvent is reused.

[0157] Reference Figure 4 According to embodiments 2-3 of the present invention, the washing device 1 includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc. The solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0158] The following mainly explains the differences between this embodiment 2-3 and the above embodiment 2-2. The omitted parts are replaced by the above content.

[0159] The washing section 10 can accept solvent and wash the fibers contained inside. The gas phase discharged from the washing section 10 after washing can be supplied to the solvent recovery section 30 through the steam recovery section 20, and the liquid phase discharged from the washing section 10 is supplied to the solvent recovery section 30.

[0160] The solvent recovery unit 30 may include a moisture removal unit 38, a filtration unit 31, a solvent storage unit 32, and a solvent supply unit 34. Liquid solvent discharged from the washing unit 10 can first be supplied to the moisture removal unit 38 to separate water mixed in the solvent for the first time, and then supplied to the filtration unit 31. The solvent that has passed through the filtration unit 31 can be stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are respectively equipped with a sensor unit 35 and a second sensor unit 35', thereby enabling the measurement of the internal moisture content.

[0161] According to the washing apparatus 1 of this embodiment, a solvent return line 36 connecting the solvent storage unit 32 and the moisture removal unit 38 may also be provided. The solvent return line 36 can supply the solvent stored in the solvent storage unit 32 to the moisture removal unit 38. Specifically, the solvent return line 36 can transfer the liquid solvent stored in the solvent storage unit 32 to the front end of the moisture removal unit 38. For example, one end of the solvent return line 36 may be connected to the lower part of the solvent storage tank, and the other end may be connected to the solvent recovery line 12 or the moisture removal unit 38. The solvent return line 36 is provided with a solvent return valve 37 whose switch and opening degree can be adjusted, thereby adjusting the flow rate of the solvent supplied to the moisture removal unit 38.

[0162] The control unit 40 can receive information about the moisture content from at least one of the sensor unit 35 and the second sensor unit 35'. Based on the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35', the control unit 40 adjusts the opening of the solvent return valve 37, thereby adjusting the flow rate of the solvent supplied to the moisture removal unit 38.

[0163] For example, the control unit 40 may store information about the composition of the solvent suitable for reuse in the solvent supply unit 34. The control unit 40 may have predetermined reference values ​​regarding the moisture content inside the solvent storage unit 32 and the moisture removal unit 38. When the moisture content measured by the sensor unit 35 of the solvent storage unit 32 is greater than the predetermined first reference value, the control unit 40 may open the solvent return valve 37 or increase its opening. The first reference value may be the maximum amount of moisture that the solvent can contain; when the moisture content stored in the solvent storage unit 32 exceeds this value, at least a portion of the solvent can be supplied to the moisture removal unit 38 to remove moisture. When the moisture content measured by the second sensor unit 35' of the moisture removal unit 38 is less than the predetermined second reference value, the control unit 40 may open the solvent return valve 37 or increase its opening. The second reference value may be the maximum amount of moisture that the moisture removal unit 38 can process per unit flow rate or per unit time; when the amount of moisture processed in the moisture removal unit 38 is less than this value, a portion of the solvent stored in the solvent storage unit 32 can be further processed.

[0164] As described above, according to Embodiments 2-3, the solvent recovered from the washing unit 10 can be stored in the solvent storage unit 32 after passing through the moisture removal unit 38 and the filtration unit 31, and then supplied to the washing unit 10. The solvent storage unit 32 and the moisture removal unit 38 are equipped with sensor units 35 and 35', which can monitor the internal moisture content in real time. Therefore, the control unit 40 can supply the solvent in the solvent storage unit 32 to the moisture removal unit 38 for further moisture removal based on the information about the moisture content received from at least one of the sensor units 35 and 35' of the solvent storage unit 32 and the moisture removal unit 38.

[0165] Reference Figure 5 According to embodiments 2-4 of the present invention, the washing device 1 includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc. The solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0166] The following mainly explains the differences between this embodiment 2-4 and the above embodiment 2-3. The omitted parts are replaced by the above content.

[0167] The washing section 10 can accept solvent and wash the fibers contained inside. After washing, the gas phase discharged from the washing section 10 can be supplied to the solvent recovery section 30 through the steam recovery section 20, and the liquid phase discharged from the washing section 10 is supplied to the solvent recovery section 30.

[0168] The solvent recovery unit 30 may include a filtration unit 31, a moisture removal unit 38, a solvent storage unit 32, and a solvent supply unit 34. Liquid solvent discharged from the washing unit 10 can pass through the filtration unit 31 and be supplied to the moisture removal unit 38, and then stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are respectively equipped with a sensor unit 35 and a second sensor unit 35', thereby enabling the measurement of the internal moisture content.

[0169] Reference Figure 7 The moisture removal section 38 may further include a dehumidifier box 38b inside the housing 38a. The dehumidifier box 38b can separate water that has passed through the housing 38a by adsorption. The dehumidifier box 38b can be detachably disposed inside the housing 38a of the moisture removal section 38. For example, the dehumidifier box 38b can be disposed on at least a portion of the wall surface of the housing 38a. Although not shown, the housing 38a is configured to allow at least a portion of the wall surface, such as a portion of the upper surface, to be opened, allowing the dehumidifier box 38b or the permeation membrane 38c to be disposed or replaced when the portion of the wall surface is opened. For example, the dehumidifier box 38b can be disposed adjacent to a moisture discharge line 39 that discharges water outwards to the outside with reference to the permeation membrane 38c and the permeation membrane 38c. The dehumidifier box 38b can promote the permeation of water molecules that have passed through the permeation membrane 38c.

[0170] The dehumidifier box 38b can adsorb water by at least one of physical adsorption and chemical adsorption methods, and can use the same packaging material as the adsorption box 32b described above.

[0171] According to the washing apparatus 1 of this embodiment, it may also include a solvent return line 36 connecting the solvent storage unit 32 and the moisture removal unit 38. The control unit 40 adjusts the opening of the solvent return valve 37 based on the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35', thereby adjusting the flow rate of the solvent supplied to the moisture removal unit 38.

[0172] As described above, according to Embodiments 2-4, the solvent recovered from the washing unit 10 can be stored in the solvent storage unit 32 after passing through the filtration unit 31 and the moisture removal unit 38, and then supplied to the washing unit 10. The moisture removal unit 38 is configured to include a permeation membrane 38c and a dehumidification box 38b, thereby improving the separation efficiency in the permeation membrane 38c. The control unit 40 supplies the solvent in the solvent storage unit 32 to the moisture removal unit 38 again based on the information about the moisture content received from at least one of the sensor units 35 and 35' of the solvent storage unit 32 and the moisture removal unit 38, thereby further removing moisture.

[0173] Reference Figure 6 According to embodiments 2-5 of the present invention, the washing device 1 includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc. The solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0174] The following mainly explains the differences between this embodiment 2-5 and the above embodiment 2-4. The omitted parts are replaced by the above content.

[0175] The washing section 10 can accept solvent and wash the fibers contained inside. After washing, the gas phase discharged from the washing section 10 can be supplied to the solvent recovery section 30 through the steam recovery section 20, and the liquid phase discharged from the washing section 10 is supplied to the solvent recovery section 30.

[0176] The solvent recovery unit 30 may include a filtration unit 31, a moisture removal unit 38, a solvent storage unit 32, and a solvent supply unit 34. Liquid solvent discharged from the washing unit 10 is supplied to the moisture removal unit 38 via the filtration unit 31 and can then be stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are respectively equipped with a sensor unit 35 and a second sensor unit 35', thereby enabling the measurement of the internal moisture content.

[0177] The water removal section 38 of the washing apparatus 1 according to this embodiment further includes a dehumidification box 38b inside, which can improve the water separation efficiency. The solvent storage section 32 may include a solvent storage tank 32a and an adsorption box 32b.

[0178] The control unit 40 adjusts the opening of the solvent return valve 37 based on the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35', thereby adjusting the flow rate of the solvent supplied to the moisture removal unit 38.

[0179] As described above, according to Embodiments 2-5, the solvent recovered from the washing unit 10 is stored in the solvent storage unit 32 after passing through the filtration unit 31 and the moisture removal unit 38, and can then be supplied to the washing unit 10. The moisture removal unit 38 is configured to include a permeation membrane 38c and a dehumidification box 38b, thereby improving the separation efficiency in the permeation membrane 38c. The solvent storage unit 32 is configured to include an adsorption box 32b inside the solvent storage tank 32a, thereby preventing decomposition of the solvent during storage. The control unit 40, based on information about the moisture content received from at least one of the sensor units 35 and 35' of the solvent storage unit 32 and the moisture removal unit 38, supplies the solvent in the solvent storage unit 32 back to the moisture removal unit 38, thereby further removing moisture.

[0180] Experimental Example 2. Confirmation of the solvent composition after washing

[0181] Washing apparatuses according to embodiments of the present invention and washing apparatuses according to a comparative example were prepared and washed under the same conditions. The same type of fibers were placed in each washing apparatus, and a composition containing a compound according to the above-described chemical formula 1 (in the chemical formula, R1 and R2 are alkyl groups having one carbon atom, and R3 is hydrogen) was used as the washing solvent. The composition of the washing solvent is shown in Table 4 below.

[0182] At the start of the wash cycle, solvent was supplied, and the wash lasted 15 minutes. Solvent was recovered during the drying process. Afterward, other fibers were placed in the washing unit, and the recovered solvent was supplied again, followed by another wash. A total of 30 washes were performed using the same method, without replacing the solvent storage tank or container during the wash cycle. After the final wash, the composition of the solvent that had been in the storage tank was confirmed, as shown in Table 4 below.

[0183] Table 4

[0184]

[0185] As shown in Table 4, in Comparative Example 2-1 concerning existing washing devices, approximately 30% by weight of the compound according to Formula 1 decomposes into acetone and glycerol.

[0186] Conversely, in the washing apparatus according to an embodiment of the present invention, after 30 washes, only less than 10% by weight of the compound according to Formula 1 is decomposed. Thus, the washing apparatus according to an embodiment of the present invention maintains a high concentration of the compound according to Formula 1 even after repeated washing, thereby maintaining washing efficiency and saving costs by reusing the solvent.

[0187] The present invention is not limited to the embodiments described above. Other embodiments may include combinations of multiple embodiments described above or combinations of at least one of the embodiments described above with known technologies.

[0188] The present invention has been described in detail above through specific embodiments. However, these are only for illustrating specific embodiments of the present invention, and the present invention is not limited thereto. It should be understood that those skilled in the art to which the present invention pertains can bring modifications or improvements.

[0189] Simple variations and modifications of this invention are all included within the scope of protection of this invention, and the specific scope of protection of this invention can be clearly defined by the claims.

[0190] Marker description

[0191] 1: Washing device; 10: Washing section

[0192] 11: Steam intake line; 12: Solvent recovery line

[0193] 20: Steam recovery section; 21: Steam intake section

[0194] 22: Steam condensation section; 23: Steam recovery line

[0195] 30: Solvent recovery unit; 31: Filtration unit

[0196] 32: Solvent storage section 32a: Solvent storage tank

[0197] 32b: Adsorption box; 33: Solvent recovery line

[0198] 34: Solvent Supply Department 35: Sensor Department

[0199] 35': Second sensor section; 36: Solvent return line

[0200] 37: Solvent return valve; 38: Moisture removal section

[0201] 38a: Housing; 38b: Dehumidifier box

[0202] 38c: Permeable membrane; 39: Moisture removal line

[0203] 40: Control Department

Claims

1. The use of a solvent expressed in Formula 1 below and a fragrance with a log P value of 0.5 to 4.5 in the preparation of a dry cleaning composition for reducing wrinkling of fibers after washing, said dry cleaning composition comprising said combination. [Chemical Formula 1] In chemical formulas, R1 and R2 are independent straight-chain or branched alkyl groups having 1 to 4 carbon atoms. R3 is hydrogen. The fragrance is an organic compound that has a pleasant aroma.

2. The application according to claim 1, characterized in that, R1 and R2 are straight-chain or branched alkyl groups with 2 to 4 carbon atoms that are independently linked together to form cycloalkyl groups.

3. The application according to claim 1, characterized in that, R1 and R2 mentioned above are methyl groups.

4. The application according to claim 1, characterized in that, The above fragrance contains one or more compounds selected from the group consisting of vanillin, resorcinol, 2,4-dihydroxy-3,6-dimethylbenzoic acid, geraniol, benzyl benzoate, and 2-ethylhexene.

5. The application according to claim 1, characterized in that, The dry cleaning composition comprises 0.0001 to 30% by weight of the above-mentioned fragrance, relative to 100% by weight.

6. The application according to claim 1, characterized in that, The above-mentioned dry cleaning composition is a liquid composition that also includes one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, enzymes, preservatives and viscosity modifiers.

7. The use of a combination of a solvent expressed by the following chemical formula 1 and a fragrance with a log P value of 0.5 to 4.5 in the preparation of a dry cleaning composition for reducing wrinkles in fibers after washing, said dry cleaning composition comprising the combination. [Chemical Formula 1] In chemical formulas, R1 and R2 are independent straight-chain or branched alkyl groups with 1 to 4 carbon atoms, and R3 is hydrogen. The fragrance is an organic compound that has a pleasant aroma.

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