Aircraft toilet deodorant and preparation method thereof

Abstract

The invention discloses a deodorant for an airplane toilet and a preparation method of the deodorant, and the deodorant is prepared from the following components in percentage by weight: 2 to 3 percent of 1-ethyl-2-(heptadeca-8-alkenyl)-4, 5-dihydro-1-(2-ethoxyl) imidazoline ethyl sulfate, 1 to 2.5 percent of chlorogenic acid and 95.45 to 96.95 percent of deionized water. 1-ethyl-2-(heptadeca-8-alkenyl)-4, 5-dihydro-1-(2-ethoxyl) imidazoline ethyl sulfate which is originally used for cosmetics is used as a main component for deodorization of an airplane toilet, and chlorogenic acid is matched, so that the antibacterial effect is improved by one order of magnitude. The deodorant can effectively neutralize odor molecules such as mercaptans, hydrogen sulfide, ammonia, amine and 3-methylindole in human excrement, and can permanently inhibit generation of odor. The product meets the standard of American aviation standard SAE AMS 1476C (Aircraft Toilet Deodorant), and does not cause corrosion to metal and non-metal materials of aircrafts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deodorant preparation, and particularly relates to an aircraft toilet deodorant and a preparation method thereof. BACKGROUND

[0002] The aircraft toilet is a closed space with poor ventilation, and the odor of human excretion is not easy to dissipate, which affects the comfort of passengers and cabin crew. The existing deodorant has complex components and poor deodorizing effect.

[0003] Therefore, the prior art still needs to be further improved and promoted. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides an aircraft toilet deodorant and a preparation method thereof, which aims to solve the problem of complex components and poor deodorizing effect of the existing aircraft toilet deodorant.

[0005] The technical scheme adopted by the present application to solve the above technical problems is as follows:

[0006] In a first aspect, an aircraft toilet deodorant comprises, by mass percentage:

[0007] 1-ethyl-2-(heptadecan-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl) imidazoline ethyl sulfate 2-3%

[0008] chlorogenic acid 1-2.5%

[0009] deionized water 95.45-96.95%.

[0010] The following is a preferred technical scheme of the present application, but is not a limitation on the technical scheme provided by the present application. Through the following preferred technical scheme, the purpose and beneficial effects of the present application can be better achieved and realized.

[0011] As a preferred technical scheme, the aircraft toilet deodorant comprises, by mass percentage:

[0012] 1-ethyl-2-(heptadecan-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl) imidazoline ethyl sulfate 2%

[0013] chlorogenic acid 1%

[0014] pigment 0.05%

[0015] deionized water 96.95%.

[0016] As a preferred technical scheme, the aircraft toilet deodorant comprises, by mass percentage:

[0017] 1-ethyl-2-(heptadecan-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate 3%

[0018] chlorogenic acid 2.5%

[0019] pigment 0.05%

[0020] deionized water 95.45%.

[0021] In a second aspect, the method for preparing the aircraft lavatory deodorant of the first aspect, comprising:

[0022] proportionally weighing the 1-ethyl-2-(heptadecan-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, chlorogenic acid and deionized water;

[0023] adding the 1-ethyl-2-(heptadecan-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and chlorogenic acid into the deionized water, heating to 40-50℃, and stirring to obtain the aircraft lavatory deodorant.

[0024] Beneficial effects: compared with the prior art, the aircraft lavatory deodorant provided by the embodiment of the present application has simple components, can effectively neutralize odor molecules such as mercaptans, hydrogen sulfide, ammonia, amines and 3-methylindole in human excreta, and can persistently inhibit the generation of odor. The product meets the standard of American aviation standard SAE AMS1476C (aircraft lavatory deodorant) and will not cause corrosion to the metal and non-metal materials of the aircraft. DETAILED DESCRIPTION

[0025] The present application provides an aircraft lavatory deodorant and a preparation method thereof. In order to make the purpose, technical scheme and effects of the present application more clear and explicit, the present application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially changed or adjusted in a manner obvious to those skilled in the art. Therefore, the order in the specification is only for clear description of a certain embodiment, and does not mean that it is a necessary order, unless otherwise stated that a certain order must be followed. The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The instruments used are commercially available products.

[0027] The aircraft toilet deodorizer provided in this embodiment of the invention is composed of the following formula: 2-3% 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate; 1-2.5% chlorogenic acid (Eucommia ulmoides leaf extract, 25%); 0.05% blue pigment; and 95.45-96.95% deionized water.

[0028] Among them, 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate (CAS: 61741-09-1) has the following molecular structure:

[0029] Wherein, R=CH3(CH2)7CH=CH(CH2)7.

[0030] 1-Ethyl-2-(heptadecyl-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate contains an imidazoline cation (a positively charged five-membered ring) as the active center. Hydrogen bonding: The oxygen atom in the imidazoline ring and ethyl sulfate acts as a hydrogen bond acceptor, forming hydrogen bonds with odor molecules containing hydroxyl (-OH), amino (-NH2), hydrogen sulfide (H2S), thiols (R-SH), and NH in 3-methylindole, reducing volatility and achieving deodorization. Coordination: The imidazoline ring can form ligands with some odor molecules (hydrogen sulfide (H2S), thiols (R-SH), -NH2) to reduce volatility and achieve deodorization. 1-Ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate is a quaternary ammonium salt that can kill microorganisms and reduce the persistent odor generated by bacterial decomposition of human excrement. For example, urea can be decomposed into ammonia odor by bacteria.

[0031] 1-Ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate exhibits excellent metal corrosion inhibition capabilities. Its core strength lies in its strong chemisorption through the N→Metal coordination bond of the imidazoline ring, combined with the electrostatic interaction of the quaternary ammonium salt and the long-chain hydrophobic barrier, forming a multi-layered protective mechanism that isolates corrosive media from the metal surface. Aircraft use various metals, and human excrement can cause sodium chloride corrosion. 1-Ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate can inhibit metal corrosion.

[0032] Chlorogenic acid:

[0033]

[0034] Cas 327-97-9, extracted from Eucommia ulmoides leaves, with a content of over 25%. The price of Eucommia ulmoides bark extract is relatively lower than other sources, making it suitable for industrial production. It neutralizes the odor of human excrement and has a synergistic deodorizing effect with 1-ethyl-2-(heptadecyl-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate. Chlorogenic acid is also a microbial inhibitor, effectively inhibiting the odor produced by bacterial decomposition of human excrement. When combined with 1-ethyl-2-(heptadecyl-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, the antibacterial effect is enhanced, exhibiting a synergistic effect. The antibacterial rate can increase by a logarithmic order after combination, resulting in a longer period of odor-free treatment and preventing the continuous generation of odors. 3, Chlorogenic acid oxidizes in air to form an o-benzoquinone structure. Its electron-deficient nature allows it to undergo an electrophilic addition reaction with the electron-rich thiol group (-SH) to form a stable CS bond, generating an odorless sulfide compound. The quinone structure in chlorogenic acid can oxidize H2S to produce elemental sulfur or sulfate. The polyphenolic structure of chlorogenic acid can combine with the aromatic ring of indole through π-π stacking to form an inclusion complex, reducing its volatility. Under oxidative conditions, the quinone intermediate of chlorogenic acid can break the CN bond of the indole ring, degrading it into an odorless small molecule carboxylic acid (such as an-aminobenzoic acid).

[0035] The following specific preparation examples will further explain the deodorizer for aircraft toilets provided by the present invention.

[0036] Example 1

[0037] Weigh out the following ingredients according to the specified proportions: 2% 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, 1% chlorogenic acid (Eucommia ulmoides leaf extract, 25%), 0.05% blue pigment, and 96.95% deionized water. Add the deionized water, pigment, chlorogenic acid, and 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate to a mixing tank. Heat to 40°C, start stirring at 120 rpm, and stir for 30 minutes. After stirring, stop the stirring and allow to cool to room temperature before filtering and filling.

[0038] To use, add 500ml of airplane toilet deodorizer to the toilet tank of the airplane toilet. It will automatically enter the wastewater tank and neutralize odors when flushing. Add 500ml after each flight to effectively reduce the odor in the entire toilet.

[0039] Example 2

[0040] Weigh the following ingredients according to the specified proportions: 3% 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, 1.5% chlorogenic acid (Eucommia ulmoides leaf extract, 25%), 0.05% blue pigment, and 95.45% deionized water. Add the deionized water, pigment, chlorogenic acid, and 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate to a mixing tank. Heat to 45°C, start stirring at 120 rpm for 30 minutes, then stop stirring. Cool to room temperature, filter, and fill into containers.

[0041] To use, add 500ml of airplane toilet deodorizer to the toilet tank of the airplane toilet. It will automatically enter the wastewater tank and neutralize odors when flushing. Add 500ml after each flight to effectively reduce the odor in the entire toilet.

[0042] Antibacterial test of ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and chlorogenic acid. Human feces contain Escherichia coli, which decomposes the organic matter of feces in the first few hours, continuously producing hydrogen sulfide and indole, resulting in a stronger fecal odor. The higher the antibacterial rate against E. coli, the longer the odor is suppressed. Comparison 1 is the antibacterial rate of 750 ppm 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate; Comparison 2 is the antibacterial rate of 750 ppm chlorogenic acid; Comparison 3 is the antibacterial rate of 500 ppm 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and 250 ppm chlorogenic acid. The method is based on the "Disinfection Technical Specifications 2002 Edition". The results are shown in the table below:

[0043]

[0044] As can be seen above, Comparison 1 shows that the antibacterial rate of 1-ethyl-2-(heptadecyl-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate at 750 ppm is 92.5%; Comparison 2 shows that chlorogenic acid at 750 ppm has an antibacterial rate of 88.9%; and Comparison 3 shows that the antibacterial rate of a combination of 1-ethyl-2-(heptadecyl-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate at 500 ppm and chlorogenic acid at 250 ppm reaches 99.9%. This demonstrates that the combination of the two has a synergistic antibacterial effect, significantly improving the antibacterial rate by one logarithmic order without increasing the total concentration. The beneficial effect is a sustained improvement in the deodorization effect of wastewater.

[0045] The deodorizing effects of 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and chlorogenic acid were tested. Comparison 1 involved using 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate alone as a deodorant; Comparison 2 involved using chlorogenic acid alone as a deodorant; and Implementation 1 involved using both 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and chlorogenic acid as deodorants. Each deodorant formulation was mixed with an equal volume of fresh human feces and urine mixture, and the odor level was measured (the odor level of the untreated human feces and urine mixture after 8 hours was defined as level 4). The method followed SAE AMS1476C (Aircraft Toilet Deodorizer). The results are shown in the table below:

[0046]

[0047] Odor levels are divided into:

[0048] Level 4: Extremely strong odor

[0049] Level 3 has a strong odor.

[0050] Level 2: Medium odor (the smell of deodorizer can be detected; the sewage odor is not pungent or offensive).

[0051] Level 1: Slight odor (the smell of deodorizer is noticeable)

[0052] Level 0: No odor (the smell of deodorizer is the main odor).

[0053] Compared to Comparison 3, where 3% of 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate was used alone to treat wastewater, the initial odor level was level 1, which improved to level 2 after 8 hours. Compared to Comparison 4, where 3% of chlorogenic acid was used alone to treat wastewater, the initial odor level was level 2, which improved to level 3 after 8 hours. Implementation 1, using 2% of 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and 1% chlorogenic acid as deodorants, showed an initial odor level of level 0, which improved to level 1 after 8 hours. This demonstrates that 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate and chlorogenic acid have a synergistic effect, improving the deodorization effect while maintaining the same total dosage. The long-lasting deodorization effect of the compound is also synergistically enhanced.

[0054] Verification of the corrosion inhibition effect of 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate on aluminum alloys:

[0055] Human excrement, including urine and feces, contains sodium chloride, which can corrode metals. Therefore, the airworthiness standard SAE AMS1476C (Aircraft Toilet Deodorizer) sets limits on the corrosiveness of deodorizers to aluminum alloys, making the addition of corrosion inhibitors essential. Comparison 3 contained a 250 ppm sodium chloride aqueous solution, while Comparison 4, based on Comparison 3, added 0.1% of 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate. Total immersion corrosion and intercalation corrosion on aluminum alloys were tested, respectively, according to SAE AMS1476C (Aircraft Toilet Deodorizer). The results are shown in the table below.

[0056]

[0057] The higher the values ​​for total immersion corrosion and intercalation corrosion, the greater the corrosion. As can be seen above, 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate has a good corrosion inhibition effect on aluminum alloy corrosion caused by chloride ions.

[0058] Implementation 1 and Implementation 2 were tested using the US airworthiness standard SAE AMS1476C, and all items met the requirements shown in the table below:

[0059]

[0060]

[0061] In summary, this invention provides an aircraft toilet deodorizer comprising: 2-3% 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, 1-2.5% chlorogenic acid, and 95.45-96.95% deionized water. By using 1-ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate, originally used in cosmetics, as the main ingredient for aircraft toilet deodorization, and combining it with chlorogenic acid, the antibacterial effect is increased by an order of magnitude. Furthermore, this deodorizer can effectively neutralize odor molecules in human excrement such as thiols, hydrogen sulfide, ammonia, amines, and 3-methylindole, and can persistently inhibit odor production. It complies with the US aviation standard SAE AMS1476C (Aircraft Toilet Deodorizer) and will not corrode the metallic and non-metallic materials of the aircraft.

[0062] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An aircraft toilet deodorizer, characterized in that, By weight percentage, including: 1-Ethyl-2-(heptadec-8-enyl)-4,5-dihydro-1-(2-hydroxyethyl)imidazoline ethyl sulfate 2-3% Chlorogenic acid 1-2.5% Deionized water 95.45-96.95%.

2. The aircraft toilet deodorizer according to claim 1, characterized in that, By weight percentage, including:

3. The aircraft toilet deodorizer according to claim 1, characterized in that, By weight percentage, including:

4. A method for preparing the aircraft toilet deodorizer according to claim 1, characterized in that, include: Weigh out the isostearyl ethyl imidazoline ethyl sulfate, chlorogenic acid, and deionized water according to the specified proportions. The isostearyl ethyl imidazoline ethyl sulfate and chlorogenic acid are added to the deionized water, heated to 40-50°C, and stirred to obtain the aircraft toilet deodorizer.

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