JPH08253795A - Detergent composition for air filter - Google Patents

Abstract

PURPOSE: To obtain a detergent compsn. for an air filter having such an excellent detergent performance as to enable an air filter to be cleaned, regenerated and reused, by using a specific substance. CONSTITUTION: This compsn. comprises a surfactant (e.g. polyoxyethylene nonylphenyl ether), which is pref. a nonionic surfactant. If necessary, the compsn. may further comprise a chelating agent (e.g. ethylenediaminetetraacetic acid, tripolyphosphoric acid, sodium 1-hydroxyethylidene-1,1-diphosphonate, or the like), and may still further comprise an alkali (e.g. Na2 CO3 , monoethanolamine, sodium metasilicate or the like).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition used for cleaning and recycling an air filter.

[0002]

2. Description of the Related Art Air filters are widely used in household electric appliances, industrial electric appliances, clean rooms, automobiles, marine engines, power generation turbines, etc. for the purpose of air cleaning. It is used in large quantities to protect engines and the like. For example, a large amount of air is required for a car engine to run normally. At first glance, clean air contains a large amount of harmful substances such as carbon, silica, and fine dust such as fine metal powder.If air is introduced into the engine without removing these harmful components, Wear, wear of operating parts, deterioration of engine oil, etc. may occur, which may have a fatal effect on the engine.

In order to remove these influences, an air filter (air cleaner, air element) is used for the purpose of air cleaning. However, if the air filter becomes excessively polluted, ventilation resistance increases, which causes a new problem of deterioration of fuel efficiency of the engine. For example, in the trucking industry, which is a logistics company in the Japanese industrial world, it is said that when the air filter for a diesel engine becomes significantly contaminated, the fuel efficiency of the truck is reduced by about 30%. Since this reduction in fuel consumption directly leads to an increase in cost, the current situation is to replace the filter with a new filter on a regular basis depending on the pollution state and the operating distance.

The used air filter is partially blown with air, washed with water, and washed with hot water to be reused, but it has a low detergency and is not an effective regenerating method. As a result, most of the waste is disposed of, leading to an increase in the cost required for engine maintenance, and eventually to an increase in Japan's industrial waste. In view of such a current situation, a cleaning agent composition capable of completely cleaning contaminants that are complicatedly and widely adsorbed in a densely molded filter fiber for the purpose of cleaning, recycling and reusing an air filter. As a result of earnestly studying the development of the above, the present invention has been achieved.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a cleaning composition which exhibits excellent cleaning performance in cleaning, regenerating and reusing an air filter.

[0006]

The cleaning composition for an air filter according to the present invention is characterized by containing a surfactant, or a chelating agent, or an alkaline agent in addition to these. To do. The air filter can be regenerated by washing with this detergent composition.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The air filter cleaning composition and the cleaning / regenerating method of the present invention will be described in order. The air filter here is not limited by its use, shape, size, or material. For example, the application is an automobile,
Household electric appliances, industrial electric appliances, clean rooms, ship engines, power generation turbines, etc.
Examples include prisms. Examples of the material include paper, cloth, synthetic fiber and the like. Of course, it is possible to wash the whole and take out a part of it for washing. For example, there is a case where only the filter paper of the air filter is taken out and washed separately from the outer frame.

The detergent composition of the present invention may contain a surfactant, a chelating agent and an alcal agent, and each of these components will be described below. (A) Surfactant The surfactant can be selected from anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants, and is particularly nonionic. Surfactants are preferred. Examples of the anionic surfactant include the followings. 1) Linear alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16 2) Alpha olefin sulfonate having an average carbon number of 10 to 20 3) Alkyl group or alkenyl group having 4 to 10 carbon atoms
Dialkyl sulfosuccinate of 4) The sulfonate of fatty acid lower alkyl ester represented by the general formula (1) of Chemical formula 1 or di-salt of fatty acid sulfonate

[0009]

Embedded image (R ₁ : C 8-20 alkyl group or alkenyl group Y: C 1-3 alkyl group or counter ion Z: counter ion)

5) Alkyl sulfate having an average carbon number of 10 to 20 6) Having a linear or branched alkyl group or alkenyl group having an average carbon number of 10 to 20 and adding an average of 0.5 to 8 mol of ethylene oxide. Alkyl ether sulfate 7) Saturated or unsaturated fatty acid salt having an average carbon number of 10 to 22 As the counter ion in these anionic surfactants, alkali metals such as sodium and potassium, or alkanols such as monoethanolamine and diethanolamine. Amine salts are used.

Examples of the nonionic surfactant include the following. Here, p represents the average number of moles of alkylene oxide added. As the alkylene oxide, ethylene oxide, propylene oxide, butylene oxide or a mixed adduct of these is used.

1) Polyoxyalkylene (p = 3-4)
0) alkyl or alkenyl (C ₁₀ -C ₂₂₎ ether 2) polyoxyalkylene (p = 3 to 40) alkyl or alkenyl (C ₆ -C ₁₂₎ phenyl ether 3) polyoxyalkylene (p = 1 to 40) alkyl or alkenyl (C ₁₀ -C ₂₂₎ amine 4) polyoxyalkylene (p = 1 to 50) alkyl or alkenyl (C ₁₀ -C ₂₂₎ amide 5) ethylene oxide / propylene oxide block adduct (Pluronic type surfactants) molecular weight 500-30
00 Among the above various surfactants, the general formula (2) of the following chemical formula 2
The nonionic surfactants shown in are suitable for the present invention.

[0013]

Embedded image R ₂ —O— (A ₁ O) p—H (2) (R ₂ : alkyl group having 10 to 22 carbon atoms, alkenyl group or alkylphenyl group A ₁ : alkylene having 2 to 4 carbon atoms Group p: represents the average number of moles of added alkylene oxide A ₁ O and is a number of 3 to 20. However, the same alkylene oxide may be added alone or two or more kinds of alkylene oxides are mixed and added. May be.)

(B) Chelating Agent As the chelating agent, a general chelating agent can be used, but a polyvalent carboxylic acid, a salt thereof, or a phosphorus compound is particularly preferable. Further, as the polyvalent carboxylic acid, citric acid, malic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid are preferable. As the phosphorus compound, orthophosphoric acid, condensed phosphoric acid, di- or triphosphonic acid represented by the general formula (3) or (4) of Chemical formula 3, and salts thereof are preferable. Examples of the salt form include alkali metal salts such as sodium, potassium and lithium, ammonium salts, alkanolamine salts and the like.

[0015]

[Chemical 3]  (R₃, R_Four: Hydrogen atom, hydroxyl group, benzyl group,
C1-C21 alkyl group, alkenyl group, alkyl
An aryl group or an aryl group. M₁, M₂, M₃, M_Four, M_Five, M₆: Hydrogen atom or salt
Counterion to be formed. m, n, q: number of 1 or 2)

Examples of the condensed phosphoric acid include pyrophosphoric acid, tripolyphosphoric acid, tetrametaphosphoric acid, hexametaphosphoric acid and trimetaphosphoric acid. As the di- or triphosphonic acid derivative represented by the general formulas (3) and (4), in the general formula (3), R ₃ and R ₄ are a hydrogen atom, a hydroxyl group, a benzyl group, an alkyl group having 1 to 21 carbon atoms, Those that are alkenyl groups, alkylaryl groups or aryl groups are used. The following compounds and salts thereof are used as specific examples of such diphosphonic acid derivatives, and examples of the salts include alkali metal salts such as sodium, potassium and lithium, and ammonium salts.

1-Hydroxyethylidene-1,1-diphosphonic acid 1-Hydroxyhexylidene-1,1-diphosphonic acid 1-Hydroxydodecylidene-1,1-diphosphonic acid 1-Hydroxyhexadecylidene-1,1 -Diphosphonic acid 1-hydroxyphenylmethylene-1,1-diphosphonic acid ethylidene-1,1-diphosphonic acid isopropylidene-1,1-diphosphonic acid benzylmethylene-1,1-diphosphonic acid bisbenzylmethylene-1,1-diphosphonic acid acid

As the triphosphonic acid derivative of (4), aminotri (methylenephosphonic acid) [in the general formula (4), m, n and q are 1], aminotri (ethylenephosphonic acid) or a salt thereof, etc. Of these, aminotri (methylenephosphonic acid) and salts thereof are preferable. Examples of the salt include alkali metals such as sodium, potassium and lithium, ammonium salts and the like.

(C) Alkaline agent As the alkaline agent used in the present invention, NaOH, KO
H, NH ₄ OH, quaternary ammonium hydride, Na
Carbonates such as ₂ CO _{3 and the} like, silicates, monoethanolamine and diethanolamine are preferable, and as the quaternary ammonium hydride, those represented by the following general formula (5) are particularly preferable, and especially as the silicate. Those represented by the following general formula (6) are preferable.

[0020]

Embedded image _{(R 5, R 6, R} 7, R 8: a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, hydroxyl alkyl or alkenyl group)

[0021]

Embedded image aM ₂ O · bSiO ₂ (6) (M: alkali metal salt of Na, K or the like a: 1 to 3, preferably 1 to 2 b: 1 to 5, preferably 1 to 2 b / a : 0.3-4, preferably 0.5-1)

The air filter cleaning composition of the present invention can take various dosage forms such as liquid and powder. In any case, water can be contained, and if necessary, liquid stabilizers such as ethylene glycol, propylene glycol, glycerin, methanol, ethanol, propanol, and toluene sulfonate if liquid, and Na if powder.
Can be blended ₂ SO _4, K ₂ SO soluble inorganic electrolytes, such as _4. In any case, a rust preventive such as benzotriazole or a preservative such as benzoate can be added. Prepare a clear or dispersed cleaning solution by diluting with the stock solution or with water and wash. The dilution concentration is preferably 10 ^-5 % by weight or more. More preferably, it is 1 to 70% by weight. Although any cleaning method can be used, ultrasonic cleaning, spray cleaning, and high-pressure water cleaning are particularly good in terms of cleaning efficiency and workability.

Next, formulation examples of the present invention will be described by taking a detergent system containing the following components (a) to (c) as an example. (1) (a) Surfactant system 0.01% of (a) surfactant is added to the detergent composition of the present invention.
-100% by weight. (2) System of (a) surfactant + (b) chelating agent In the detergent composition of the present invention, (a) surfactant 0.01 to
99.99% by weight, (b) chelating agent 0.01 to 99.
It contains 99% by weight. Preferably by weight ratio (a):
(B) = 10 to 90: It is preferable to mix in a ratio of 90 to 10.

(3) System of (a) Surfactant + (b) Chelating Agent + (c) Alkaline Agent In the cleaning composition of the present invention, 0.01 to (a) surfactant is added.
99.98% by weight (b) chelating agent 0.01 to 99.9
8% by weight, and 0.01 to 99.98% by weight of (c) alkali agent. The weight ratio is preferably (a) :( b):
(C) = 5 to 90: 5 to 90: 5 to 90: It is preferable to mix in the ratio.

[0025]

According to the present invention, it is possible to realize a cleaning agent composition for removing dirt adhering to an air filter after use and reuse the air filter to save resources.

[0026]

EXAMPLES The present invention will be described in detail below with reference to examples, but prior to that, the evaluation method adopted in the examples will be described. The present invention is not limited to these examples. (1) Detergency evaluation method Actually 3 on a heavy-duty truck equipped with a diesel engine.
The air filter used for monthly operation is used as a sample for cleaning and regeneration. The detergent having the composition shown in Table 1 below is diluted with water to prepare a 10% aqueous solution. The ultrasonic cleaning machine is filled with a cleaning liquid of 50 liters and 40 ° C., an air filter is immersed therein, and ultrasonic cleaning is performed for 5 minutes. The filter after the washing test is thoroughly rinsed with tap water and dried in a 100 ° C. dryer for 2 hours. The degree of cleaning was visually evaluated according to the following evaluation criteria, and the results are shown in Table 1. Here, a grade of O or above is passed. ◎ ・ ・ ・ ・ ・ Completely cleaned ○ ・ ・ ・ ・ ・ Almost cleaned △ ・ ・ ・ Cleaning remains × ・ ・ ・ Not cleaned

[0027]

[Table 1]Table 1: Cleaning agent composition and evaluation method Example 1 2 3 4 5 6 7 Detergent composition (wt%) Surfactant: NPE1 *¹10-5 5-5 20 NPE2 *²− 20 10 10 − 10 −AES-Na * ³ − − − − 15 − − Chelating agent: EDTA *^Four− − 2 2 2 2 2 − Tripolyphosphate Na 3 − 3 3 3 − 50Diphosphonic acid Na * ⁵ − − − − − 3 − Alkaline agent: Na₂CO₃− − − − 2.5 2 30 MEA *⁶− − − 2.5 − − − Metasilicate Na 2.5 − − − − − − Water 84.5 80.0 80.0 77.5 77.5 78.0 − Evaluation: Detergency ◎ ○ ○ ~ ◎ ◎ ○ ~ ◎ ◎ ◎ * 1: Polyoxyethylene (15 mol) nonylphenyl ether * 2: Polyoxyethylene (8.6 mol) nonylphenyl ether * 3: Polyoxyethylene (3 mol) sodium lauryl ether sulfate * 4: Ethylenediaminetetraacetic acid * 5 : 1-Hydroxyethylidene-1,1-diphosphonate sodium * 6: Monoethanolamine

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C11D 3/10 C11D 3/10 3/20 3/20 3/26 3/26 3/30 3 / 30 3/33 3/33 3/36 3/36 (72) Inventor Hirotoshi Ushiyama 1-3-7 Main Office, Sumida-ku, Tokyo Within Lion Corporation (72) Inventor Masae Kodama, Sumida-ku, Tokyo 1-3-7 Lion Corporation (72) Inventor Shinichi Seto 1-3-7 Hongo Office, Sumida-ku, Tokyo Inside Lion Corporation

Claims (4)

[Claims] 1. A detergent composition for an air filter, which comprises a surfactant. 2. A detergent composition for an air filter, which contains a surfactant and a chelating agent. 3. A detergent composition for an air filter, which contains a surfactant, a chelating agent and an alkaline agent. 4. The cleaning composition for an air filter according to claim 1, wherein the surfactant is a nonionic surfactant.