Eco-friendly solvent, and washing composition and washing apparatus comprising same

Abstract

To provide a composition for washing capable of reducing peculiar odor and reducing wrinkle formation in a fiber after washing.SOLUTION: The laundry composition according to the present invention comprises a solvent selected from the group consisting of solketal and derivatives thereof, and a scent, wherein the scent has a logP value of - 1.0 to 4.5, the washing device is characterized by comprising a washing section for washing fibers contained therein by being supplied with a solvent, a vapor recovery section for condensing a vapor phase discharged from the washing section and supplying the vapor phase to a solvent recovery section, and a solvent recovery section for recovering a liquid phase discharged from the washing section and supplying the liquid phase to a solvent supply section, wherein the solvent recovery section comprises a filter section for removing foreign matter from the solvent supplied from at least one of the vapor recovery section and the washing section, and a solvent storage section for storing the solvent supplied from the filter section.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an environmentally friendly solvent, a laundry composition containing the same, and a laundry device using the same. More specifically, the present invention relates to a laundry composition that can reduce wrinkle formation on fabrics by further adding a specific fragrance to a solvent containing solketal, and to a laundry device that can be reused by preventing the decomposition of the solvent. [Background technology]

[0002] Typically, washing to remove stains from textiles and clothing can be divided into two methods: dispersing surfactants in water to remove stains, and dry cleaning, which dissolves stains in solvents to remove them. Washing methods using water and surfactants are effective for removing water-based stains, but have limitations in removing oily stains. Dry cleaning is suitable for washing textiles and clothing that are not suitable for washing processes involving strong dehydration, and is suitable for removing oily stains using organic solvents.

[0003] Traditionally, petroleum-based or chlorinated solvents have been primarily used in dry cleaning. Petroleum-based solvents are hydrocarbons with 10 or more carbon atoms, more specifically, hydrocarbons with 10 to 13 carbon atoms. Petroleum-based solvents have the advantages of excellent cleaning power against oily contaminants and being highly volatile and easy to dry. However, they have limitations, such as a low boiling point and high vapor pressure, which pose a risk of fire or explosion, and the risk of causing environmental pollution through VOCs when discharged to the outside. Chlorinated solvents include compounds such as percarbon (PERC), which is a compound consisting of two double-bonded carbon atoms and four chlorines. Chlorinated solvents have the advantages of excellent cleaning power against oily contaminants, high volatility, and low risk of explosion, but they have been found to be toxic substances that can cause cancer in humans. The use of petroleum-based and chlorinated solvents is gradually being restricted.

[0004] To overcome these drawbacks of conventional solvents, various solvents have been developed, such as glycol ether-based solvents, bromine-containing solvents, and silicone oil-containing solvents. Alternative methods have also been proposed, such as a dry cleaning method using liquefied carbon dioxide and a wet cleaning method using only a small amount of water to remove contamination.

[0005] Glycol ether solvents have attracted attention for their superior cleaning power compared to petroleum-based hydrocarbon solvents, but they have drawbacks such as relatively low volatility, long drying times, and the energy required for drying. Bromine-containing solvents, such as N-propyl bromide and 1-bromopropane, have the advantage of being non-flammable, but they cause environmental pollution when emitted outdoors, cause contact irritation to the human body, and have been shown to cause serious illnesses if inhaled over a long period of time. Recent animal testing has suggested that silicone oil may cause cancer, leading to the initiation of restrictions on its use. Dry cleaning methods using liquefied carbon dioxide require high pressures of over 600 psi to liquefy the carbon dioxide, which requires expensive equipment and poses a risk of explosion. Wet cleaning methods, however, have limitations due to the shrinkage and deformation of fibers caused by water.

[0006] Recently, a solvent containing the compound of the following Chemical Formula 1 has been proposed for washing textiles. It has been found that this solvent is safe for humans and the environment, has excellent cleaning power against contamination, has low risk of explosion, and dries quickly and easily.

[0007] [ka]

[0008] In the formula: R1 and R2 are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R3 is hydrogen or straight or branched alkyl having 1 to 4 carbon atoms.

[0009] In the formula: R1 and R2 are each independently a straight or branched alkyl having 2 to 4 carbon atoms, and can be linked together to form a cycloalkyl.

[0010] The compound of Chemical Formula 1 above is soluble in water, unlike petroleum-based, chlorine-based, and silicone oil-containing solvents, and has been found to be suitable for both dry cleaning and water-based cleaning.

[0011] However, although the solvent of Formula 1 is relatively less than petroleum-based and chlorine-based solvents, it still has the problem of leaving a peculiar odor on fabrics after washing.In addition, when water is used in the washing process or when the compound of Formula 1 is mixed with water contained in fabrics and exposed to acidic conditions, it decomposes into glycerol and acetone, making it difficult to recover and reuse. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Registered Patent Publication No. 10-1128856 (Published March 14, 2012) [Patent Document 2] Published Patent Publication No. 10-2014-0073597 (Published June 17, 2014) [Patent Document 3] Published Patent Publication No. 10-2017-0082444 (Published July 14, 2017) Summary of the Invention [Problem to be solved by the invention]

[0013] The present invention has been made to solve the problems of laundry compositions containing the compound of Formula 1 as a solvent, and an object of the present invention is to provide a laundry composition that can reduce the peculiar odor of the compound of Formula 1 by further adding a fragrance having a specific logP value to the laundry composition and reduce wrinkle formation on fabrics after washing.

[0014] The present invention has been made to solve the problems that arise when washing clothes using the compound of Formula 1 as a solvent. Another object of the present invention is to provide a washing machine that recovers the used solvent, removes water from the solvent, prevents decomposition of the compound, and allows the washing machine to reuse the solvent. [Means for solving the problem]

[0015] The laundry composition according to Example 1 of the present invention includes a solvent represented by the following Chemical Formula 1 and a fragrance, and the fragrance has a logP value of -1.0 to 4.5.

[0016] [ka]

[0017] In the formula: R1 and R2 are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R3 is hydrogen or alkyl having 1 to 4 carbon atoms.

[0018] Specifically, in the above formula 1, R1 and R2 are each independently a straight or branched alkyl having 2 to 4 carbon atoms, and may be linked together to form a cycloalkyl.

[0019] Specifically, in the above Chemical Formula 1, R1 and R2 may be methyl, and R3 may be hydrogen.

[0020] Specifically, the scent may include 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.

[0021] Specifically, the fragrance may be contained in an amount of 0.0001 to 30% by weight relative to 100% by weight of the laundry composition.

[0022] Specifically, the laundry composition may be a liquid composition further comprising one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, enzymes, preservatives, and viscosity modifiers.

[0023] The present invention also provides a method for washing fabrics, characterized by using the laundry composition according to Example 1.

[0024] A washing machine according to a second embodiment of the present invention includes a washing unit that receives a supply of solvent and washes stored fabrics; a vapor recovery unit that condenses a vapor phase discharged from the washing unit and supplies the condensed vapor phase to a solvent recovery unit; and a solvent recovery unit that recovers a liquid phase discharged from the washing unit and supplies the liquid phase to a solvent supply unit, wherein the solvent recovery unit includes a filter unit that removes foreign matter from the solvent supplied from at least one of the vapor recovery unit and the washing unit, and a solvent storage unit that stores the solvent supplied from the filter unit.

[0025] Specifically, the steam recovery unit may include a steam suction unit that recovers steam generated in the washing unit, and a steam condenser that exchanges heat between the steam supplied from the steam suction unit and water.

[0026] Specifically, the solvent storage unit may include a solvent storage tank that supplies the solvent to the solvent supply unit, and a sensor unit that measures the amount of moisture contained in the solvent storage tank.

[0027] Specifically, the solvent storage tank includes an adsorption cartridge detachably disposed inside the solvent storage tank, and the adsorption cartridge may include at least one of activated carbon, charcoal, silica gel, alumina gel, sulfuric acid, activated clay, zeolite, and bentonite.

[0028] Specifically, the sensor unit may measure the moisture content inside the solvent storage tank using at least one of electrical conductivity, pH concentration, color, viscosity, and infrared light.

[0029] Specifically, the solvent recovery unit may further include a moisture removal unit having a permeable membrane, and the permeable membrane may be a pervaporation membrane, a hollow fiber membrane, or a reverse osmosis membrane. The moisture removal unit may supply the solvent that has passed through the permeable membrane to the solvent supply unit or the solvent storage unit.

[0030] Specifically, the moisture removal unit may include an adsorption cartridge detachably disposed inside the moisture removal unit, and the adsorption cartridge may be disposed so as to come into contact with the solvent that has passed through the permeable membrane.

[0031] Specifically, the moisture removing unit may include a second sensor unit for measuring the amount of moisture contained in the moisture removing unit.

[0032] Specifically, the washing machine may further include a solvent return line that supplies the solvent stored in the solvent storage tank to the moisture remover, a solvent return valve that is installed on the solvent return line and adjusts the supply flow rate of the solvent, and a control unit that adjusts the opening of the solvent return valve according to the moisture content measured by at least one of the sensor unit and the second sensor unit.

[0033] Specifically, the control unit may open the solvent return valve or increase the opening degree thereof when the moisture content measured by the sensor unit is greater than a predetermined first reference value or when the moisture content measured by the second sensor unit is less than a predetermined second reference value.

[0034] Specifically, the solvent may include a compound represented by the following Chemical Formula 1:

[0035] [ka]

[0036] In the formula: R1 and R2 are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R3 is hydrogen or straight or branched alkyl having 1 to 4 carbon atoms.

[0037] Specifically, in the above compound, R1 and R2 are each independently a straight or branched alkyl having 2 to 4 carbon atoms, and can be linked together to form a cycloalkyl. [Effects of the Invention]

[0038] The laundry composition according to the present invention uses solketal and its derivatives as a solvent, which are more environmentally friendly and safe for humans than petroleum-based and chlorine-based solvents, and further contains a fragrance along with the solvent, thereby reducing the distinctive odor of the solvent.

[0039] The present invention can reduce wrinkle formation on fabrics after washing by using fragrances having specific log P values ​​for laundry compositions containing solketal and its derivatives as solvents.

[0040] The washing device according to the present invention can recover and reuse the solvent from the gas phase and liquid phase generated after washing textiles using a solvent.

[0041] In addition, the washing machine according to the present invention can remove water from the recovered solvent to prevent the solvent from decomposing. [Brief explanation of the drawings]

[0042] [Figure 1] FIG. 1 is a conceptual diagram of a conventional washing machine. [Figure 2] 2 is a conceptual diagram of a washing machine according to Example 2-1 of the present invention. [Figure 3] FIG. 2 is a conceptual diagram of a washing machine according to Example 2-2 of the present invention. [Figure 4] FIG. 10 is a conceptual diagram of a washing machine according to Example 2-3 of the present invention. [Figure 5] FIG. 10 is a conceptual diagram of a washing machine according to Example 2-4 of the present invention. [Figure 6] FIG. 10 is a conceptual diagram of a washing machine according to Example 2-5 of the present invention. [Figure 7] 2 is a conceptual diagram showing a water removal unit included in a laundry machine according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0043] The objects, particular advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. It should be noted that in this specification, when referring to components in each drawing, the same reference numerals are used to refer to the same components even if they appear in different drawings. In describing the present invention, detailed descriptions of related publicly known technologies will be omitted if it is determined that such descriptions would unnecessarily obscure the gist of the present invention.

[0044] In the following description, the terms high temperature, low temperature, high pressure, and low pressure are relative terms and do not indicate absolute values.

[0045] Hereinafter, the term "fabric" refers to laundry to be washed by a washing machine according to an embodiment of the present invention, and collectively refers to clothing, miscellaneous goods, bedding, and other products containing fibers.

[0046] Hereinafter, the solvent refers to a mixture containing a compound represented by the following Chemical Formula 1.

[0047] [ka]

[0048] In the formula: R1 and R2 are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R3 is hydrogen or straight or branched alkyl having 1 to 4 carbon atoms.

[0049] In the above formula, R1 and R2 are each independently a straight or branched alkyl having 2 to 4 carbon atoms, and can be linked together to form a cycloalkyl.

[0050] In the above formula, R1 and R2 may be alkyl having one carbon atom, or alkyl having one and two carbon atoms, or alkyl having one and three carbon atoms, or alkyl having one and four carbon atoms, and the alkyl having four carbon atoms may include branched alkyl.

[0051] For example, in the above formula, R1 and R2 may be methyl, and R3 may be hydrogen. Alternatively, in the above formula, R1 may be ethyl, propyl, or isobutyl, R2 may be methyl, and R3 may be hydrogen. Preferably, in the above formula, R1 and R2 are methyl, and R3 は It may also be hydrogen.

[0052] In the following, the solvent may further contain surfactants, bleaching agents, whitening agents, dye transfer inhibitors, fragrances, preservatives, etc., in addition to the compound of Chemical Formula 1, and may further contain a small amount of water. Vapor collectively refers to the vapor phase of such solvents and a mixture of fine particles.

[0053] In the following, a laundry composition may be a composition for dry cleaning of fabrics or a liquid composition.

[0054] The laundry composition according to Example 1 of the present invention includes a solvent represented by Chemical Formula 1 and a fragrance, and the fragrance may have a logP value of -1.0 to 4.5.

[0055] Hereinafter, scent may refer to one or more compounds that are used in conjunction with the solvent of the present invention to emanate from the laundry composition and fabrics washed using said laundry composition.

[0056] Specifically, in the present invention, by using a fragrance with a logP value of -0.1 to 4.5 and leaving the fragrance on the fabric, the characteristic odor of the solvent in the washed fabric can be reduced and the persistence of the fragrance in the washed fabric can be improved.

[0057] Furthermore, fragrances having the above logP values ​​remain on washed fabrics and can prevent wrinkles. The washing process of fabrics involves not only contact with laundry compositions but also the removal of contaminants using mechanical force, which can induce temporary deformation of the fabric. Depending on the type of material constituting the fabric, fibers may be composed of molecules containing hydrophilic functional groups on at least a portion of their surface. The hydrophilic functional groups can induce intermolecular attractive forces, such as hydrogen bonds, between adjacent hydrophilic functional groups or between water or hydrophilic molecules that come into contact with the fibers during the washing process. Such intermolecular attractive forces are relatively strong when the fabric is deformed, leading to the formation of wrinkles due to creasing of the fabric. The fragrance of the present invention, which has the above logP values, remains on fabrics and maintains a relatively lipophilic surface, reducing the intermolecular forces constituting the fabric and preventing wrinkles.

[0058] In the following, P is a partitioning coefficient, which may indicate the solubility of a compound in two solvents, or more specifically, may be the octanol-water partitioning coefficient. For example, P may be the ratio of the solubility of a compound in octanol to the solubility of a compound in water. If a compound is lipophilic, the P value can be very large and can be expressed as a logP value.

[0059] The fragrance may be an organic compound with a unique fragrance, but is not limited to aromatic compounds. Those with a logP value of -0.1 to 4.5 can be used. If the logP value of the fragrance is lower than -1.0, it will rapidly volatilize from the laundry composition or the surface of fabrics washed with the laundry composition, resulting in a significant decrease in fragrance on the fabric surface. If the logP value of the fragrance is higher than 4.5, its compatibility with the solvent of the present invention will rapidly decrease, resulting in separation of the fragrance and the solvent in the laundry composition. That is, the fragrance used in the present invention may be one or more compounds that are soluble in octanol at a ratio of approximately 0.8 to 30,000 times that in water.

[0060] Preferably, the fragrance has a logP value of 0.5 to 4.5, more preferably 0.7 to 4.5. Even more preferably, the fragrance has a logP value of 1.0 to 4.4, and most preferably 2.0 to 4.4. The solvent according to the present invention may have a logP value of approximately 1.07, and the fragrance has a logP value similar to or relatively higher than that of the solvent, and is compatible with the solvent. This allows for excellent retention on fabrics after washing and excellent compatibility with the composition itself.

[0061] The fragrance is (2-tert-butylcyclohexyl)acetate, (3-oxo-2-pentylcyclopentyl)acetic acid acid), (E)-4-decanal, 1-(1,2,3,4,5,6,7,8-Octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)ethanone, 1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one ne), 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)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-yl acetateacetate, 10-undecenal, 17a-hydroxyprogesterone, 1-bromoethane, 1-bromopentane, 1-butanol, 1-butene, 1-chlorohexane, 1-fluorooctane, 1-heptanol, 1-heptene, 1-hexanol, 1-hexene, 1-iodobutane, 1-methoxy-2-propanol an-2-ol, 1-naphthol, 1-nonanol, 1-octanol, 1-octyne, 1-pentanol (1.56), 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 (1.65 ... 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 acidacid, 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-methoxyethanol, 2-methoxyethyl acetateacetate, 2-methyl-1-butanol, 2-methyl-1-propanal, 2-methyl-2-butanol, 2-methyl-2-pentanol, 2-methyl-2-propanol, 2-methylbutyl acetate, 2-methylbutyric acid, 2-methylpropane, 2-methylpropionic acid acid, 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,4-(4-Hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde, 3-(4-tert-butylphenyl)-2-methylpropanal (Lilial), 3,4-xylenol, 3,7-dimethyloct-6-en-1-ol, 3,7-dimethyl-2,6-octadiol 3,7-dimethylocta-2,6-dienal, 3,7-dimethyl-3-octanol, 3-cresol, 3-hexanol, 3-hexanone, 3-methyl-1-butanol, 3-methyl-3-pentanol, 3-methylbutyl acetate acetate, 3-methylbutyric acid, 3-nitrophenol, 3-phenyl butanal, 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 acidacid, 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 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 terpineol, amobarbital, amyl alcohol alcohol), Amyl salicylate, Androstenedione, Anethole USPUSP, Aniline, α-terpineol, Atrazine, Atropine, Azodrin, Barbital, Benzaldehyde, Benzene, Benzocaine ne, Benzoic acid, 2-amino, dihydrochloride, Benzophenone, Benzyl acetate, Benzyl alcohol, Benzyl benzoate, Benzyl nicotinate, Benzyl salicylate, beta-terpineol, beta-estradiol, Boric acid, Butachlor, Butobarbital, Butyl 4-hydroxybenzoate, Butyl acetate, Butyl alcohol, Butyl nicotinate, Butyraldehyde, Butyric acid acid, caffeine, carbamic acid, dimethyl-, ethyl ester, carbaryl, carvone, catechol, chloramphenicol, chlorocresol, chloroform, chloroxylenol, chlorpheniramine, cinnamic acid, cinnamic aldehyde, cinnamic alcohol, cinnamyl alcohol, cinnamyl anthranilate, cis-1,3-dichloropropene, cis-3-hexenyl acetateacetate, cis-6-nonenal, cis-jasmone, codeine, cortexone, coumarin, cumene, cyclododecanone, cyclohexane, cyclohexanone, cyclopentanone, cycloundecanone, decanal, decanoic acid, deoxycorticosterone, diisopropyl fluorophosphate (DFP), dehydroepiandrosterone (DHEA), diazinon, dichloromethane, diclofenac, diethyl ether, diethyl maleate maleate, diethyl malonate, diethyl phthalate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethylether, dihydro linalool, dihydromyrcenol, dihydro-α-terpineol, dimethoate, dimethyl benzyl carbinyl acetate, dimethyl carbonateCarbonate, Dimethylcyclohexanol, Dimethylethylamine, Dimethylformamide, Dimethylnitrosamine, Dinitrochlorobenzene, Diphenyl ether, Dipropylene glycol methyl ether, dl-Citronellol, d-Limonene, Dimethylphthalate (DMP), E-2-Butenal, E-2-Hexenal, E-2-Octene, Ethylene Glycol glycol), ephedrine, estradiol, estragole, estriol, estrone, ethane, ethanol, ethyl acetate, ethyl benzene, ethyl ether, ethyl hydrogen malonate, ethyl nicotinate, ethyl vanillin, ethylbenzene, ethylene glycol methyl ether, ethynylbenzene, eucalyptol, eugenol, eugenyl methyl ether, floracetate acetate), Flutamide, Geraniol, Geranyl nitrile, Glycerol formalFormal, 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 isovalerate isovalerate, 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 acetate), methyl anthranilate, methyl atrarate, methyl benzoate, methyl beta naphthyl ketone, methyl dihydrojasmonatedihydrojasmonate, methyl isobutyl ketone, methyl N methylanthranilate, methyl nicotinate, methyl propionate, methyl salicylate, methyl tert-butyl ether, methyl-4-hydroxybenzoate, methyl-4-OH benzoate, methyl-parathion, methylsalicylate, morphine, musk ketone 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 acidacid, n-pentane, n-pentanol, N-phenyl-2-naphthylamine, n-propanol, n-propoxyethanol, o-chlorotoluene, o-cresol, o-cresyl glycidyl ether, octanal, octanoic acid, octanol, orange flower ether phenyl ethyl acetate, o-toluidine, o-xylene, paraoxon, parathion, p-cresol, pentanoic acid acid), pentanol, phenethyl alcohol l), phenobarbital, phenol, phenoxanol, phenoxyethyl isobutyrate, phenyl ethyl alcohol, phenyl propyl alcohol, phenylethyl alcohol, phosmet, phoxim, phthalic acid, pirimicarb, pregnenolone, progesterone, 2-prop-2-enyl heptanoate, propane, propenal, propene, propionaldehyde, propionic acid acid, Propoxur, Propranolol, Propyl acetate, Propyl butyrate, Propyl formate, Propylene carbonate, Propylene glycol, pt-Butyl-α-methylhydrocinnamic aldehyde, p-Xylene, Pyridine, Resorcinol, Safrole, Salicylic acidacid, scopolamine, styrene, terpinen-4-ol, tert-butanol, testosterone, tetrahydrofuran, tetrahydrolinalool, theophylline, thymol, toluene, triacetin, trichloromethane, trichloromethyl phenyl carbinyl acetate, triclopyr, tricyclododecenyl acetate, triethanolamine, trifluoroacetic acid, trimethylamine, undecanoic acid, valeric acid The compound may be 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.

[0062] The laundry composition according to this embodiment may contain a fragrance in an amount of 0.0001 to 30% by weight based on 100% by weight of the laundry composition. If the fragrance content is less than 0.0001% by weight, the effect of reducing the characteristic odor of the solvent will be significantly reduced. If the fragrance content is more than 30% by weight, the effect of removing solvent stains from textiles will be significantly reduced.

[0063] The laundry composition according to this embodiment may further contain one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, detergent aids, stabilizers, enzymes, preservatives, dyes, viscosity modifiers, sequestering agents, fatty acids, thickeners, and pH adjusters, within the scope of the present invention.

[0064] The organic solvent may be a monool, a polyol, etc. For example, the organic solvent may be an alcohol having 1 to 4 carbon atoms, or may be one or more selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol, and glycerin, but is not limited to these.

[0065] The surfactant may be a cationic surfactant, anionic surfactant, amphoteric surfactant, nonionic surfactant, etc., which can improve the detergency and stability of the laundry composition against specific soils. For example, the cationic surfactant may be one or more selected from the group consisting of ester quat, alkyl dimethyl benzene ammonium chloride, distearyl methyl ammonium chloride (TEACI), imidazolinium derivatives, etc.; the anionic surfactant may be one or more selected from the group consisting of soap, alkyl benzene sulfonate, alkane sulfonate, alpha olefin sulfonate, alpha sulfo fatty acid methyl ester, alkyl sulfate, alkyl ether sulfate, etc.; the amphoteric surfactant may be one or more selected from the group consisting of alkyl betaine, alkyl sulfobetaine, etc.; and the nonionic surfactant may be one or more selected from the group consisting of alcohol ethoxylate, alkyl phenol ethoxylate, alkyl amine oxide, methyl glucamide, alkyl polyglucoside, etc., but is not limited thereto.

[0066] The type of electrolyte is not particularly limited, and any electrolyte commonly used in the art can be used without limitation. The electrolyte can improve the solubilization stability of other additives, including surfactants, in the laundry composition, thereby improving the detergency of the laundry composition. For example, the electrolyte can be a salt of an organic or inorganic acid, and the salt can be one or more selected from the group consisting of chloride, bromide, iodide, acetate, bicarbonate, phosphate, citrate, sulfate, polyphosphate, pyrophosphate, triphosphate, tetraphosphate, silicate, metasilicate, polysilicate, carbonate, hydroxide, alkali metal salt, etc.

[0067] The enzyme can improve cleaning power against specific stains. For example, the specific stains may include proteins, and the enzyme may be one or more selected from the group consisting of, but not limited to, proteases, lipases, amylases, etc.

[0068] The preservative prevents deterioration of the laundry composition and may be, for example, but is not limited to, one or more selected from the group consisting of ethanol, phenoxyethanol, benzisothiazolinone, methylchloroisothiazolinone, methylisothiazolinone, pentynediols, parabens, sodium benzoate, and the like.

[0069] The viscosity modifier may be a thickening agent, and may be one or more selected from the group consisting of inorganic salts, hydroxyethyl cellulose, xanthan gum, fatty acid alkanolamides, and the like used in the art.

[0070] Furthermore, ingredients such as bleaching agents, dyes, pH adjusters, foam adjusters, etc. may be used alone or in combination within the range that does not impair the object of the present invention, but are not limited to these.

[0071] The present invention provides a use of the composition according to Example 1. Specifically, the present invention provides a use of a composition comprising a solvent represented by Chemical Formula 1 and a fragrance as a laundry composition.

[0072] The present invention also provides a method for treating textiles or products containing the same using a laundry composition containing the solvent and fragrance represented by Chemical Formula 1. Specifically, the present invention provides a method for washing, dry cleaning, removing stains, or removing foreign matter by contacting textiles or products containing the same with a laundry composition containing the solvent and fragrance represented by Chemical Formula 1.

[0073] More specific examples of the laundry composition of the present invention will be described below.

[0074] Example 1. Laundry composition containing solvent and fragrance

[0075] Solketal, a compound according to Chemical Formula 1 above, in which R1 and R2 are methyl and R3 is hydrogen, was used as a solvent to prepare laundry compositions containing the fragrances shown in Table 1 below.

[0076] In the examples, compositions with a logP value of approximately 0.7 to 4.3 were used, while in comparative example 1-1, only solvent was used without adding fragrance, in comparative example 1-2, a composition with a logP value lower than -1.0 was used, and in comparative example 1-3, a composition with a logP value higher than 4.5 was used. Except for comparative example 1-1, which used only solvent, the following examples and comparative examples contained 95% by weight of solvent and 5% by weight of fragrance relative to 100% by weight of the total laundry composition, so that the effects of the solvent and fragrance could be confirmed.

[0077] [Table 1]

[0078] Experimental Example 1-1. Evaluation of Solketal-specific odor and fragrance of fabrics after washing

[0079] Fabrics were washed using the laundry compositions according to the examples and comparative examples of the present invention, and after drying the fabrics, the characteristic odor of the solvent solketal in the fabrics and the fragrance were subjected to sensory evaluation, and the results are shown in Table 2 below.

[0080] The odor evaluation based on the solketal specific odor and fragrance was based on the strength of the lingering scent, and the average score was calculated from the evaluations by 15 odor evaluation personnel (5 points: very strong, 4 points: strong, 3 points: normal, 2 points: weak, 1 point: very weak).

[0081] [Table 2]

[0082] It was confirmed that the greater the logP value of the fragrance contained in the laundry composition according to the examples when used, the greater the reduction in the peculiar odor of solketal on fabrics after washing. However, in Comparative Example 1-2, where the logP value was lower than -1.0, and Comparative Example 3, where the logP value was higher than 4.5, the degree of reduction in the peculiar odor was drastically reduced, reaching a level similar to that of Comparative Example 1-1, where no separate fragrance was used.

[0083] Similarly, the stronger the logP value of the fragrance contained in the laundry composition according to the example increased, the stronger the fragrance of the fabric after washing, but when the fragrances according to comparative examples 1-2 and 1-3 were used, the fragrance was confirmed to be at a very weak level.

[0084] This result is thought to be because the more lipophilic the fragrance used in the laundry composition, the larger its logP value, and the more likely it is to remain on the fabric without being washed away during the washing process, thereby reducing the peculiar odor of solketal or releasing its own fragrance.In Comparative Examples 1-3, the logP value of the fragrance was too large, and the solvent and fragrance were separated and applied in the laundry composition, resulting in a relatively large amount of solketal remaining on the surface of the fabric.

[0085] Experimental Example 1-2. Evaluation of the degree of wrinkle formation of fabric after washing

[0086] Fabrics were washed using the laundry compositions according to the examples and comparative examples of the present invention, and the degree of wrinkle formation after drying was evaluated sensorily. The results are shown in Table 3 below.

[0087] The degree of wrinkle formation of the fabric after washing was evaluated by a composite satisfaction level based on visual and tactile sensations, and the average score was calculated from the evaluations by 15 fabric evaluation monitoring personnel (5 points: very satisfied, 4 points: satisfied, 3 points: normal, 2 points: dissatisfied, 1 point: very dissatisfied).

[0088] [Table 3]

[0089] It was confirmed that the higher the logP value of the fragrance contained in the laundry composition according to the examples, the fewer wrinkles formed on the fabric after washing, and the higher the satisfaction level. However, in Comparative Example 1-2, where the logP value was lower than -1.0, and Comparative Example 1-3, where the logP value was higher than 4.5, the amount of wrinkles was actually increased.

[0090] This result is thought to be due to the fact that the more lipophilic the fragrance used in the laundry composition, the higher its logP value, and the more it remains on the surface of the fabric, reducing the intermolecular attractive forces on the surface of the fabric.In Comparative Examples 1-3, the logP value of the fragrance was so high that the solvent and fragrance separated in the laundry composition, making it difficult for the fragrance to remain.This is thought to result in the intermolecular attractive forces acting between the hydrophilic functional groups on the surface of the fabric, making wrinkles more likely to form.

[0091] A conventional washing machine and a washing machine according to a second embodiment of the present invention will be described below with reference to the drawings.

[0092] 1 is a conceptual diagram showing a conventional washing machine, which includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, and the like.

[0093] The washing unit 10 provides a space within which fibers can be accommodated, and a solvent can be supplied to the space to wash the accommodated fibers. The washing unit 10 can receive a solvent and spray it onto the fibers or mix it with the fibers to remove contaminants from the fibers. For example, the washing unit 10 may first spray a solvent onto the fibers, then supply a small amount of water and rotate it together with the fibers to remove contaminants from the fibers. The fibers washed in the washing unit 10 may be removed from the washing unit 10 and dried by spraying steam to remove additional contaminants.

[0094] The solvent supplied to the washing unit 10 remains mostly in a liquid phase, but contamination on the fabric can be easily removed by contact with a hotter solvent. Therefore, the solvent is supplied to the washing unit 10 in a heated state of 30 to 60°C, or heated to a predetermined temperature by the washing unit 10 to wash the fabric. Furthermore, as the washing unit 10 rotates, the solvent can be at least partially vaporized or dispersed in the form of fine particles, and water mixed with the solvent can also be partially vaporized or dispersed and mixed to form steam. The washing unit 10 can discharge the used solvent into a gas phase and a liquid phase, and the gas phase can be transferred to the vapor recovery unit 20 (described later) and the liquid phase can be transferred to the solvent recovery unit 30 (described later).

[0095] Specifically, a steam suction line 11 and a solvent recovery line 12 may be connected to the washing unit 10 to discharge the gas phase and the liquid phase, respectively. The steam suction line 11 can forcibly suck the gas phase solvent in the washing unit 10 after washing and supply it to the steam recovery unit 20. The solvent recovery line 12 can recover the liquid phase solvent in the washing unit 10 after washing and supply it to the solvent recovery unit 30.

[0096] The steam recovery unit 20 may include a steam suction unit 21 and a steam condenser 22 for sucking in the gaseous solvent generated in the washing unit 10. The steam suction unit 21 is connected to the steam suction line 11 and generates negative pressure to recover the gaseous solvent generated in the washing unit 10 by forcibly sucking it in. The steam condenser 22 condenses the steam recovered in the steam suction unit 21 to convert it into a liquid phase and delivers it to the solvent recovery unit 30. Specifically, the steam condenser 22 exchanges heat between high-temperature steam and water to cool the steam and condense it into a liquid phase. The solvent condensed in the steam condenser 22 can be supplied to the solvent recovery unit 30 via a steam recovery line 23.

[0097] The solvent recovery unit 30 may include a filter unit 31 for removing foreign matter contained in the solvent, a solvent storage unit 32 for storing the solvent supplied from the filter unit 31, and the like.

[0098] The filter unit 31 can receive the liquid solvent discharged from the washing unit 10 through the solvent recovery line 12. The filter unit 31 may include a packing material such as a mesh net or diatomaceous earth, and can first remove foreign matter mixed in the solvent by passing the solvent through it. The solvent that has passed through the filter unit 31 can be transferred to the solvent storage unit 32 and stored therein.

[0099] The solvent storage unit may be a solvent storage tank 32 that provides a space for storing the solvent discharged from the washing unit 10. The solvent storage tank 32 can store the solvent that has passed through the filter unit 31 and the condensed solvent supplied from the vapor recovery unit 20. Since the solvent stored in the solvent storage tank 32 still contains contaminants derived from water and fibers, at least a portion of the solvent may be hydrolyzed during the process of recovering and storing the solvent. Therefore, if the solvent stored in the solvent storage tank 32 is supplied to the washing unit 10 and reused, washing efficiency may decrease. Therefore, the solvent storage tank 32 may be detachable from the washing machine to allow for replacement and replenishment of the solvent. The solvent storage tank 32 may be connected to a solvent supply unit 34 via a solvent recovery line 33.

[0100] The solvent supply unit 34 can extract the solvent stored in the solvent storage tank 32 and supply it to the washing unit 10. Specifically, the solvent supply unit 34 can extract the solvent in liquid phase using a pump and can supply it after pressurizing it to a pressure suitable for spraying in the washing unit 10. Alternatively, the solvent supply unit 34 can be further provided with a heating means and can supply the solvent after heating it to a temperature required by the washing unit 10.

[0101] Such conventional washing machines recover the solvent used in the washing section, store it in a liquid phase, and then resupply it to the washing section. However, there is a problem that the efficiency of reuse is reduced due to decomposition of the solvent caused by mixing of water and solvent in the solvent storage section.

[0102] Second Embodiment A washing machine 1 according to a second embodiment of the present invention will be described with reference to FIGS.

[0103] Referring to FIG. 2, the washing machine 1 according to Example 2-1 of the present invention includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, etc., and the solvent recovery unit 30 includes a solvent storage tank 32a, an adsorption cartridge 32b, and a sensor unit 35.

[0104] The following description will focus on the differences between this embodiment 2-1 and the conventional washing machine shown in FIG. 1, and the omitted parts will be replaced with the above content.

[0105] The washing unit 10 can wash the fibers contained therein by receiving a solvent or the washing composition according to the above-described embodiments. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 via the vapor recovery unit 20, and the liquid phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30.

[0106] The solvent recovery section 30 may include a filter section 31, a solvent storage section 32, a solvent recovery line 33, and a solvent supply section .

[0107] The filter unit 31 may receive at least one of the liquid solvent discharged from the washing unit 10 via the solvent recovery line 12 and the condensed solvent supplied from the steam recovery unit 20 via the steam recovery line 23. The solvent forcibly drawn in through the steam suction unit 21 may contain not only the gaseous solvent but also the solvent and moisture in the form of fine particles, and the fine particles may contain contamination sources originating from fibers. The filter unit 31 may also remove foreign matter contained in the condensed solvent. The condensed solvent supplied from the steam recovery unit 20 may be supplied to at least one of the filter unit 31 and the solvent storage unit 32.

[0108] The solvent storage unit 32 may include a solvent storage tank 32 a, an adsorption cartridge 32 b, and a sensor unit 35 , and can store the solvent that has passed through the filter unit 31 and the condensed solvent supplied from the vapor recovery unit 20 .

[0109] The solvent storage tank 32a may be detachable from the washing machine 1. Since at least a portion of the solvent stored in the solvent storage tank 32a can naturally evaporate, the solvent storage tank 32a can accommodate both liquid and gaseous solvents. The solvent storage tank 32a can supply the liquid solvent to a solvent supply unit 34 (described later). The solvent storage tank 32a may include an adsorption cartridge 32b and a sensor unit 35.

[0110] The adsorption cartridge 32b can separate water mixed with the solvent stored in the solvent storage tank 32a by adsorbing it. The adsorption cartridge 32b can be removably disposed inside the solvent storage tank 32b. For example, the adsorption cartridge 32b can be detachably mounted on one side of the interior of the solvent storage tank 32a. Although not shown, the solvent storage tank 32a is configured so that at least a portion of its wall, for example, a portion of its top surface, is openable, and the adsorption cartridge 32b can be installed or replaced when the portion of the wall is open.

[0111] The adsorption cartridge 32b can separate water using at least one of physical and chemical adsorption methods. For example, the adsorption cartridge 32b may include a mesh case and a packing material filled inside the case. The packing material may be a physical adsorption material such as activated carbon, charcoal, silica gel, alumina gel, activated clay, zeolite, or bentonite, or a chemical adsorption material such as sulfuric acid or an ion exchange resin that separates water from ions dissolved in water. At least a portion of the adsorption cartridge 32b may be in contact with the solvent stored inside the solvent storage tank 32b. For example, the adsorption cartridge 32b may be attached to the inner wall of the solvent storage tank 32a so that only a portion of the cartridge is immersed in the solvent.

[0112] 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 and gas phase solvent stored inside the solvent storage tank 32a.

[0113] The sensor unit 35 can measure the water content of the solvent stored in the solvent storage tank 32a using at least one of electrical conductivity, pH concentration, color, viscosity, and infrared rays. The sensor unit 35 can apply a small amount of electricity to the solvent to measure its electrical conductivity and output information about the water content of the solvent by comparing it with the electrical conductivity value of a pre-prepared pure solvent. The sensor unit 35 can measure the pH concentration of the solvent and output information about the water content of the solvent by comparing it with the pH concentration value of a pre-prepared pure solvent. The sensor unit 35 can be a charge coupled device (CCD) sensor and output information about the color of the solvent. The sensor unit 35 can generate vibrations in the solvent using a piezoelectric vibrator, measure the frequency, and output information about the water content of the solvent by comparing it with the frequency value of a pre-prepared pure solvent. The sensor unit 35 can irradiate infrared light into the solvent and determine whether or not there is an absorption wavelength of water molecules from the reflected wavelength to output information about the water content.

[0114] Based on the information received from the sensor unit 35, the washing machine 1 can output information about the moisture content inside the solvent storage tank 32a to the user.

[0115] The solvent supply unit 34 can resupply the solvent recovered in the solvent storage unit 32 to the washing machine 1. The solvent supply unit 34 is equipped with a pump and can extract the liquid solvent stored in the solvent storage tank 32a, pressurize it to a pressure required by the washing unit 10, and supply it.

[0116] As described above, in this embodiment 2-1, the adsorption cartridge 32b is provided inside the solvent storage tank 32a of the solvent storage unit 32, and this separates water from the solvent recovered from the washing unit 10, thereby preventing decomposition of the solvent. The solvent storage tank 32a is provided with a sensor unit 35, which allows real-time monitoring of the moisture content inside, thereby determining when to replace the adsorption cartridge 32b or the solvent storage tank 32a, and preventing a decrease in washing efficiency due to reuse of the solvent.

[0117] Referring to FIG. 3, the washing device 1 according to Example 2-2 of the present invention includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc., and the solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0118] The following description will focus on the differences between this Example 2-2 and the above-described Example 2-1, and the omitted parts will be replaced with the above content.

[0119] The washing unit 10 can wash the fibers contained therein by receiving a solvent. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 via the vapor recovery unit 20, and the liquid phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30.

[0120] The solvent recovery unit 30 may include a filter unit 31, a solvent storage unit 32, a moisture removal unit 38, and a solvent supply unit 34. The liquid solvent discharged from the washing unit 10 may pass through the filter unit 31 and be stored in the solvent storage unit 32. A sensor unit 35 is provided in the solvent storage unit 32 to measure the moisture content inside the solvent storage unit 32.

[0121] The water removal unit 38 can remove water from the liquid solvent supplied from the solvent storage unit 32. Specifically, the water removal unit 38 can include a permeable membrane that separates the solvent from water.

[0122] 7 is a conceptual diagram showing the internal structure of the water removal unit 38. Referring to FIG. 7, the water removal unit 38 may include a housing 38a that receives an inlet stream A from the solvent recovery unit 30 and discharges an outlet stream B. The water removal unit 38 includes a permeable membrane 38c therein that can separate the solvent and water.

[0123] The permeable membrane 38c allows only the water molecules W to pass through from a mixed stream of solvent molecules S and water molecules W and discharge them to the outside (OUT). The permeable membrane 38c may be a pervaporation membrane, a hollow fiber membrane, or a reverse osmosis membrane. When the permeable membrane 38c is a reverse osmosis membrane, the water remover 38 may be installed at the bottom of the solvent storage unit 32 and separate the water using the pressure of the inflow stream A itself, or a pump may be further provided to pressurize the inflow stream A. The solvent molecules S and a small amount of water molecules W that cannot pass through the permeable membrane 38c may be discharged (B) from the water remover 38.

[0124] The water removal unit 38 can supply the solvent that has passed through the permeable membrane 38c to the solvent supply unit 34. The effluent stream B can be transferred to the solvent supply unit 34 via the solvent recovery line 33.

[0125] The moisture removal unit 38 may further include a second sensor unit 35' that measures the moisture content contained in the moisture removal unit 38. The second sensor unit 35' can measure the moisture content in the moisture removal unit 38, preferably the moisture content of the outflow stream B discharged from the moisture removal unit 38, in the same manner as the sensor unit 35 described above.

[0126] 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'. The control unit 40 can monitor the internal conditions of the solvent storage unit 32 and the moisture removal unit 38 in real time based on the received information and output the information to a display or speaker.

[0127] As described above, in this Example 2-2, the solvent recovered from the washing unit 10 is stored in the solvent storage unit 32 through the filter unit 31, and then supplied to the moisture removal unit 38, where the water is separated through a permeable membrane and supplied to the washing unit 10. The solvent storage unit 32 and the moisture removal unit 38 are equipped with sensors 35 and 35', respectively, to monitor the moisture content therein in real time, thereby preventing a decrease in washing efficiency due to the reuse of the solvent.

[0128] Referring to FIG. 4, the washing machine 1 according to the embodiment 2-3 of the present invention includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc., and the solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0129] The following description will focus on the differences between this Example 2-3 and the above-described Example 2-2, and the omitted parts will be replaced with the above content.

[0130] The washing unit 10 can wash the fibers contained therein by receiving a solvent. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 via the vapor recovery unit 20, and the liquid phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30.

[0131] The solvent recovery unit 30 may include a moisture removal unit 38, a filter unit 31, a solvent storage unit 32, and a solvent supply unit 34. The liquid solvent discharged from the washing unit 10 is first supplied to the moisture removal unit 38, and water mixed with the solvent is separated therefrom and then supplied to the filter unit 31. The solvent that has passed through the filter unit 31 may be stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are provided with a sensor unit 35 and a second sensor unit 35', respectively, to measure the moisture content therein.

[0132] The washing machine 1 according to this embodiment may further include a solvent return line 36 connecting the solvent storage unit 32 and the moisture removal unit 38. The solvent return line 36 may supply the solvent stored in the solvent storage unit 32 to the moisture removal unit 38. Specifically, the solvent return line 26 may deliver 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 26 may be connected to the bottom of the solvent storage tank, and the other end may be connected to the solvent recovery line 12 or the moisture removal unit 38. A solvent return valve 37 that can be opened, closed, and its aperture adjusted is provided on the solvent return line 36, thereby adjusting the flow rate of the solvent supplied to the moisture removal unit 38.

[0133] 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'. The control unit 40 can adjust the flow rate of the solvent supplied to the moisture removal unit 38 by adjusting the opening of the solvent return valve 37 according to the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35'.

[0134] For example, the control unit 40 may store information regarding the composition of a solvent suitable for supplying to the solvent supply unit 34 for reuse. The control unit 40 may have preset reference values ​​for the moisture content in the solvent storage unit 32 and the moisture removal unit 38. The control unit 40 may open or increase the opening of the solvent return valve 37 when the moisture content measured by the sensor unit 35 of the solvent storage unit 32 is greater than a preset first reference value. The first reference value may be the maximum moisture content that the solvent can contain, and when the moisture content stored in the solvent storage unit 32 exceeds the first reference value, at least a portion of the solvent may be supplied to the moisture removal unit 38 to remove the moisture. The control unit 40 may open or increase the opening of the solvent return valve 37 when the moisture content measured by the second sensor unit 35' of the moisture removal unit 38 is less than a preset second reference value. The second reference value may be the maximum amount of moisture that the moisture removal section 38 can process per unit flow rate or unit time, and if the amount of moisture processed by the moisture removal section 38 is smaller than this value, some of the solvent stored in the solvent storage section 32 can be further processed.

[0135] As described above, in this embodiment 2-3, the solvent recovered from the washing unit 10 is stored in the solvent storage unit 32 via the moisture removal unit 38 and the filter unit 31, and then supplied to the washing unit 10. The solvent storage unit 32 and the moisture removal unit 38 are equipped with the sensor units 35 and 35' to monitor the moisture content therein in real time, and the control unit 40 can supply the solvent in the solvent storage unit 32 to the moisture removal unit 38 again to further remove moisture according to information on 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.

[0136] Referring to FIG. 5, the washing device 1 according to Examples 2-4 of the present invention includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc., and the solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0137] The following description will focus on the differences between this Example 2-4 and the above-described Example 2-3, and the omitted parts will be replaced with the above content.

[0138] The washing unit 10 can wash the fibers contained therein by receiving a solvent. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 via the vapor recovery unit 20, and the liquid phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30.

[0139] The solvent recovery unit 30 may include a filter unit 31, a moisture removal unit 38, a solvent storage unit 32, and a solvent supply unit 34. The liquid solvent discharged from the washing unit 10 may be supplied to the moisture removal unit 38 through the filter unit 31 and then stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are provided with a sensor unit 35 and a second sensor unit 35', respectively, to measure the moisture content therein.

[0140] Referring to FIG. 7, the moisture remover 38 may further include a dehumidifying cartridge 38b inside the housing 38a. The dehumidifying cartridge 38b may separate water from the solvent flowing inside the housing 38a by adsorbing it. The dehumidifying cartridge 38b may be detachably disposed inside the housing 38a of the moisture remover 38. For example, the dehumidifying cartridge 38b may be disposed on at least a portion of the wall of the housing 38a. Although not shown, the housing 38a is configured so that at least a portion of the wall, for example, a portion of the top surface, is openable. When the portion of the wall is openable, the dehumidifying cartridge 38b or the permeable membrane 38c may be disposed or replaced. For example, the dehumidifying cartridge 38b may be disposed adjacent to the moisture discharge line 39, which discharges water to the outside (OUT), and the permeable membrane 38c, relative to the permeable membrane 38c. The dehumidifying cartridge 38b may promote the permeation of water molecules through the permeable membrane 38c.

[0141] The dehumidifying cartridge 38b can adsorb water by at least one of physical adsorption and chemical adsorption, and can use the same packing material as the adsorption cartridge 32b described above.

[0142] The washing machine 1 according to this embodiment may further include a solvent return line 36 connecting the solvent storage unit 32 and the moisture removal unit 38, and the control unit 40 can adjust the flow rate of the solvent supplied to the moisture removal unit 38 by adjusting the opening of the solvent return valve 37 according to the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35'.

[0143] As described above, in the present embodiment 2-4, the solvent recovered from the washing unit 10 is stored in the solvent storage unit 32 through the filter unit 31 and the moisture remover 38, and then supplied to the washing unit 10. The moisture remover 38 is provided to include both the permeable membrane 38c and the dehumidifying cartridge 38b, thereby improving separation efficiency in the permeable membrane 38c. The control unit 40 can supply the solvent from the solvent storage unit 32 to the moisture remover 38 again to further remove moisture according to information on the moisture content received from at least one of the sensor units 35, 35' of the solvent storage unit 32 and the moisture remover 38.

[0144] Referring to FIG. 6, the washing device 1 according to Examples 2-5 of the present invention includes a washing unit 10, a steam recovery unit 20, a solvent recovery unit 30, a control unit 40, etc., and the solvent recovery unit 30 includes a moisture removal unit 38, a solvent storage unit 32, and a sensor unit 35.

[0145] The following description will focus on the differences between this Example 2-5 and the above-described Example 2-4, and the omitted parts will be replaced with the above content.

[0146] The washing unit 10 can wash the fibers contained therein by receiving a solvent. After washing, the gas phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30 via the vapor recovery unit 20, and the liquid phase discharged from the washing unit 10 can be supplied to the solvent recovery unit 30.

[0147] The solvent recovery unit 30 may include a filter unit 31, a moisture removal unit 38, a solvent storage unit 32, and a solvent supply unit 34. The liquid solvent discharged from the washing unit 10 may be supplied to the moisture removal unit 38 through the filter unit 31 and then stored in the solvent storage unit 32. The solvent storage unit 32 and the moisture removal unit 38 are provided with a sensor unit 35 and a second sensor unit 35', respectively, to measure the moisture content therein.

[0148] The moisture removal unit 38 of the washing machine 1 according to this embodiment may further include a dehumidifying cartridge 38b therein to improve moisture separation efficiency, and the solvent storage unit 32 may include a solvent storage tank 32a and an adsorption cartridge 32b.

[0149] The control unit 40 can adjust the flow rate of the solvent supplied to the moisture removal unit 38 by adjusting the opening degree of the solvent return valve 37 according to the moisture content measured by at least one of the sensor unit 35 and the second sensor unit 35'.

[0150] As described above, in this embodiment 2-5, the solvent recovered from the washing unit 10 is stored in the solvent storage unit 32 through the filter unit 31 and the moisture remover 38, and then supplied to the washing unit 10. The moisture remover 38 is configured to include both the permeable membrane 38c and the dehumidifying cartridge 38b, thereby improving separation efficiency in the permeable membrane 38c, and the solvent storage unit 32 is configured to include the adsorption cartridge 32b inside the solvent storage tank 32a, thereby preventing decomposition of the solvent due to storage. The control unit 40 can supply the solvent from the solvent storage unit 32 back to the moisture remover 38 in response to information on the moisture content received from at least one of the sensors 35, 35' of the solvent storage unit 32 and the moisture remover 38, thereby further removing moisture.

[0151] Experimental example 2: Confirming the composition of the solvent after washing

[0152] Washing machines according to the examples and comparative examples of the present invention were prepared and washed under the same conditions. The same type of fabric was placed in each washing machine, and a composition containing the compound of Chemical Formula 1 (where 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 1 below.

[0153] During the first wash, the solvent was supplied and washed for 15 minutes, and the solvent was recovered through the drying process. After that, another fabric was placed in the washing machine, and the recovered solvent was resupplied, and then another wash was performed. A total of 30 washes were performed in the same manner, and the solvent storage tank and cartridge were not replaced during the wash process. After the final wash, the composition of the solvent recovered in the solvent storage tank was confirmed and is shown in Table 4 below.

[0154] [Table 4]

[0155] As shown in Table 4, in Comparative Example 2-1 for the conventional washing machine, it was confirmed that about 30 wt % of the compound according to Chemical Formula 1 was decomposed into acetone and glycerol.

[0156] Meanwhile, it was confirmed that even after 30 washes, less than 10 wt% of the compound according to Chemical Formula 1 was decomposed in the washing machine according to the embodiment of the present invention. As such, it is believed that the washing machine according to the embodiment of the present invention maintains a high concentration of the compound according to Chemical Formula 1 even after repeated washes, thereby maintaining washing efficiency, and that cost reduction is possible by reusing the solvent.

[0157] The present invention is not limited to the above-described embodiments, and may include combinations of the above embodiments or combinations of at least one of the above embodiments with known technology as further embodiments.

[0158] The present invention has been described in detail above through specific examples. However, these examples are for the purpose of specifically explaining the present invention, and the present invention is not limited thereto. It is clear that modifications and improvements can be made by a person having ordinary skill in the art within the technical spirit of the present invention.

[0159] Any simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims. [Explanation of symbols]

[0160] 1. Washing equipment 10 Laundry Department 11 Steam intake line 12 Solvent recovery line 20 Steam recovery section 21 Steam intake section 22 Steam condenser 23 Steam recovery line 30 Solvent recovery section 31 Filter section 32 Solvent storage section 32a Solvent storage tank 32b Adsorption Cartridge 33 Solvent recovery line 34 Solvent supply section 35 Sensor section 35' Second sensor section 36 Solvent return line 37 Solvent return valve 38 Moisture removal section 38a Housing 38b Dehumidifying cartridge 38c permeable membrane 39 Water discharge line 40 Control Unit

Claims

1. It contains a solvent and a fragrance represented by the following chemical formula 1: The laundry composition is characterized in that the fragrance has a log P value of -1.0 to 4.

5. 【Chemistry 1】 In the formula: R １ and R ２ are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R ３ is hydrogen or alkyl having 1 to 4 carbon atoms.

2. The above R １ and R ２ is methyl, and the above R ３ 10. The laundry composition of claim 1, wherein: is hydrogen.

3. The above scent is 10. The laundry composition of claim 1, comprising 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.

4. The above scent is 2. The laundry composition according to claim 1, wherein the laundry composition is contained in an amount of 0.0001 to 30% by weight based on 100% by weight of the laundry composition.

5. The laundry composition comprises:

10. The laundry composition of claim 1, which is a liquid composition further comprising one or more additives selected from the group consisting of organic solvents, surfactants, electrolytes, enzymes, preservatives, and viscosity modifiers.

6. A method for washing textiles, comprising utilizing the laundry composition according to any one of claims 1 to 5.

7. a washing section that receives a supply of a solvent and washes the stored fibers; a vapor recovery section for condensing the vapor phase discharged from the washing section and supplying the condensed vapor phase to a solvent recovery section; a solvent recovery unit that recovers the liquid phase discharged from the washing unit and supplies it to a solvent supply unit, The solvent recovery section includes: a filter unit for removing foreign matter from the solvent supplied from at least one of the vapor recovery unit and the washing unit; a solvent storage unit that stores the solvent supplied from the filter unit.

8. The vapor recovery section includes: a steam suction unit that collects steam generated in the washing unit; 8. The laundry machine according to claim 7, further comprising a steam condenser for exchanging heat between the steam supplied from the steam intake section and water.

9. The solvent storage section includes: a solvent storage tank that supplies a solvent to the solvent supply section; 8. The washing machine according to claim 7, further comprising a sensor unit for measuring the amount of water contained in the solvent storage tank.

10. The solvent storage tank is an adsorption cartridge removably disposed inside the solvent storage tank; The adsorption cartridge is 10. The laundry device according to claim 9, further comprising at least one of activated carbon, charcoal, silica gel, alumina gel, sulfuric acid, activated clay, zeolite, and bentonite.

11. The solvent recovery section includes: Further comprising a moisture removal unit having a permeable membrane; The permeable membrane is pervaporation membrane, hollow fiber membrane or reverse osmosis membrane, The moisture removal unit is 8. The washing machine according to claim 7, wherein the solvent passing through the permeable membrane is supplied to the solvent supply unit or the solvent storage unit.

12. The moisture removal unit is an adsorption cartridge detachably disposed inside the moisture removal unit; The adsorption cartridge is 12. The laundry device according to claim 11, wherein the device is arranged to come into contact with the solvent that has passed through the permeable membrane.

13. The moisture removal unit is a second sensor unit for measuring the content of moisture contained in the moisture removing unit; The washing device is a solvent return line that supplies the solvent stored in the solvent storage tank to the moisture removal unit; a solvent return valve provided on the solvent return line to adjust the supply flow rate of the solvent; 13. The laundry machine of claim 12, further comprising: a control unit that adjusts an opening degree of the solvent return valve according to the moisture content measured by at least one of the sensor unit and the second sensor unit.

14. The control unit 14. The washing machine of claim 13, wherein the solvent return valve is opened or its opening is increased when the moisture content measured by the sensor is greater than a predetermined first reference value or when the moisture content measured by the second sensor is less than a predetermined second reference value.

15. The solvent is 8. The laundry device according to claim 7, comprising a compound represented by the following Chemical Formula 1: 【Chemistry 2】 In the formula: R １ and R ２ are each independently hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms; R ３ is hydrogen or alkyl having 1 to 4 carbon atoms.

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