CN114181783B

CN114181783B - Cleaning composition, cleaning agent, preparation method of cleaning agent and cleaning method

Info

Publication number: CN114181783B
Application number: CN202111406439.0A
Authority: CN
Inventors: 张克金; 曹婷婷; 崔新然; 刘江唯
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-09-12
Anticipated expiration: 2041-11-24
Also published as: CN114181783A

Abstract

The invention relates to a cleaning composition, a cleaning agent, a preparation method thereof and a cleaning method. The cleaning composition comprises the following components in parts by weight: 0.1 to 0.8 part of fatty alcohol polyoxyethylene ether sulfate, 0.2 to 1 part of phytate, 1 to 2 parts of ammonium citrate, 0.1 to 0.2 part of dodecylphenol polyoxyethylene ether, 0.6 to 1.2 parts of ammonia water and 5 to 15 parts of ethanol. By mixing the above specific kinds of components in a specific ratio, the cleaning efficiency of ash such as colloid, carbon particles and inorganic salts in DPF is effectively improved by applying the mixture to clean DPF.

Description

Cleaning composition, cleaning agent, preparation method of cleaning agent and cleaning method

Technical Field

The invention relates to the technical field of automobiles, in particular to a cleaning composition, a cleaning agent, a preparation method of the cleaning agent and a cleaning method of the cleaning agent.

Background

The reduction of particulate emissions is one of the approaches to solving the atmospheric pollution, and the treatment of automobile exhaust is usually to add a particulate filter (DPF) to the exhaust system. DPF is installed on the automobile to effectively filter fine particles of tail gas of the diesel automobile, and the particles comprise dust particles, sulfate particles, carbon particles, colloid and other ash in the air. With the increase of the running time, a large amount of particles accumulate and block carriers in the DPF, so that the exhaust back pressure is increased, the system back pressure alarms, and the DPF needs to be regenerated. The regeneration treatment comprises vehicle-mounted regeneration and independent regeneration after dismantling, and when the vehicle-mounted regeneration cannot eliminate the backpressure alarm fault, the DPF is required to be dismantled for independent regeneration.

The traditional independent regeneration mode includes direct high-pressure air blowing, high-temperature calcination and cleaning soaking. The direct high-pressure air blowing can remove most ash, but ash dust particles blown out are scattered in the environment and blown into the atmosphere by wind to cause pollution; the high-temperature calcination mode is to directly calcine the carrier in the DPF by adopting a high-temperature furnace, and carbon particles and colloid are combusted to become carbon dioxide to be removed at the temperature of 650 ℃, but sulfate particles are difficult to solve by combustion and gasification and still remain in carrier pore channels to cause blockage; the ash in the carrier is cleaned and soaked by adopting a special liquid cleaning agent, but the traditional cleaning agent is easy to form slurry with larger viscosity with the ash in the carrier, so that wall holes on the carrier are blocked, and the effect is poor.

Disclosure of Invention

Based on the above, the invention provides a cleaning composition, a cleaning agent, a preparation method and a cleaning method thereof, and the cleaning composition has lower surface tension and effectively improves the cleaning efficiency of colloid, carbon particles, inorganic salt and other ash in a DPF carrier when being used for cleaning DPF.

The technical scheme for solving the technical problems is as follows.

The cleaning composition comprises the following components in parts by weight:

in some embodiments, the fatty alcohol-polyoxyethylene ether sulfate is present in the cleaning composition in an amount of from 0.15 to 0.5 parts by weight.

In some embodiments, the cleaning composition comprises (1-4) the fatty alcohol-polyoxyethylene ether sulfate and the dodecylphenol polyoxyethylene ether in a mass ratio of (1-4): 1.

In some embodiments, the cleaning composition comprises the following components in parts by weight:

in some embodiments, the cleaning composition, the fatty alcohol-polyoxyethylene ether sulfate is sodium fatty alcohol-polyoxyethylene ether sulfate.

The invention provides a cleaning agent, which comprises the following components in percentage by mass:

in some of these embodiments, the pH of the cleaning agent is 8 to 9.

The invention provides a preparation method of a cleaning agent, which comprises the following steps:

mixing the components in the cleaning agent.

The invention provides a cleaning method of a particulate filter, which adopts the cleaning agent to clean.

Compared with the prior art, the cleaning composition has the following beneficial effects:

the cleaning agent of the present invention is obtained by mixing the above specific components in a specific ratio, and in particular, by combining fatty alcohol-polyoxyethylene ether sulfate and phytate, when the cleaning agent is applied to DPF cleaning, the cleaning agent can react with solid salts such as calcium and magnesium on a DPF carrier, and the solid salts are converted into microcolloidal calcium phytate or magnesium phytate from the solid state, so that the solid salts such as calcium and magnesium are peeled off from the DPF wall surface; further utilizing ammonium citrate to promote the complexation between phytate and calcium ions and magnesium ions, thereby strengthening the stripping effect of ash such as colloid, carbon particles, inorganic salt and the like from the wall surface of the DPF carrier; meanwhile, the combined action of the dodecylphenol polyoxyethylene ether and the ethanol effectively reduces the surface tension of the whole cleaning composition, is beneficial to the penetration of the cleaning composition into gaps of ash such as carbon particles, inorganic salts and the like, and ensures that active ingredients in the cleaning composition are fully contacted with the ash, so that the ash is stripped more fully; and the surface tension of the cleaning composition is low, and the stripped carbon particles and inorganic salt can be quickly settled to the bottom, so that the cleaning composition is convenient for subsequent cleaning. In addition, ammonia water is added, so that the cleaning agent can be controlled to be a weak alkaline system, the weak alkaline system is helpful for balancing an acidic system caused by reaction in the cleaning process, and the cleaning effect is promoted. The components in the cleaning composition are mixed according to a specific proportion to synergistically act, so that the cleaning composition is applied to cleaning DPF, and the cleaning efficiency of ash such as colloid, carbon particles and inorganic salt in the DPF is effectively improved.

Detailed Description

Reference now will be made in detail to embodiments of the invention, one or more examples of which are described below. Each example is provided by way of explanation, not limitation, of the invention. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment.

Accordingly, it is intended that the present invention cover such modifications and variations as fall within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present invention will be disclosed in or be apparent from the following detailed description. It is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only, and is not intended as limiting the broader aspects of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The indefinite articles "a" and "an" preceding an element or component of the invention are not limited to the requirement (i.e. the number of occurrences) of the element or component. Thus, the use of "a" or "an" should be interpreted as including one or at least one, and the singular reference of an element or component includes the plural reference unless the amount clearly dictates otherwise. The meaning of "a plurality of" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

The weights of the relevant components mentioned in the description of the embodiments of the present invention may refer not only to the specific contents of the components, but also to the proportional relationship between the weights of the components, so long as the contents of the relevant components in the description of the embodiments of the present invention are scaled up or down within the scope of the disclosure of the embodiments of the present invention. Specifically, the weight described in the specification of the embodiment of the present invention may be mass units known in the chemical industry field such as μ g, mg, g, kg.

Except where shown or otherwise indicated in the operating examples, all numbers expressing quantities of ingredients, physical and chemical properties, and so forth, used in the specification and claims are to be understood as being modified in all instances by the term "about". For example, therefore, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can be varied appropriately by those skilled in the art utilizing the teachings disclosed herein seeking to obtain the desired properties. The use of numerical ranges by endpoints includes all numbers subsumed within that range and any range within that range, e.g., 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, 5, and the like.

An embodiment of the invention provides a cleaning composition, which comprises the following components in parts by mass:

the components of the specific types are mixed according to a specific proportion, and in particular, fatty alcohol polyoxyethylene ether sulfate and phytate are combined to react with solid salts such as calcium, magnesium and the like on a DPF carrier when the mixture is applied to DPF cleaning, and the solid salts such as calcium, magnesium and the like are converted into microcolloidal calcium phytate or magnesium phytate from the solid state, so that the solid salts such as calcium, magnesium and the like are peeled off from the wall surface of the DPF; further utilizing ammonium citrate to promote the complexation between phytate and calcium ions and magnesium ions, thereby strengthening the stripping effect of ash such as colloid, carbon particles, inorganic salt and the like from the wall surface of the DPF carrier; meanwhile, the combined action of the dodecylphenol polyoxyethylene ether and the ethanol effectively reduces the surface tension of the whole cleaning composition, is beneficial to the penetration of the cleaning composition into gaps of ash such as carbon particles, inorganic salts and the like, and ensures that active ingredients in the cleaning composition are fully contacted with the ash, so that the ash is stripped more fully; and the surface tension of the cleaning composition is low, and the stripped carbon particles and inorganic salt can be quickly settled to the bottom, so that the cleaning composition is convenient for subsequent cleaning. In addition, ammonia water is added, so that the cleaning agent can be controlled to be a weak alkaline system, the weak alkaline system is helpful for balancing an acidic system caused by reaction in the cleaning process, and the cleaning effect is promoted. The components in the cleaning composition are mixed according to a specific proportion to synergistically act, so that the cleaning composition is applied to cleaning DPF, and the cleaning efficiency of ash such as colloid, carbon particles and inorganic salt in the DPF is effectively improved.

In addition, the cleaning composition provided by the invention does not contain strong acid and strong alkali, so that the damage of the strong acid and the strong alkali to a DPF matrix material when the cleaning composition cleans the DPF is effectively avoided; meanwhile, the water-based paint does not contain inorganic salt components, and salt formation is effectively avoided.

In some examples, the fatty alcohol-polyoxyethylene ether sulfate is present in the cleaning composition in an amount of from 0.15 to 0.5 parts by weight.

The dissolution performance of ash such as colloid, carbon particles and the like in the cleaning composition is facilitated by controlling the mass parts of the fatty alcohol polyoxyethylene ether sulfate in the cleaning composition; the addition amount is too small, the dissolution effect of ash is not ideal, and the cleaning effect of ash is not good; and too large an amount of the additive can generate more foam, so that the ash dissolution effect can not reach the ideal effect.

In some examples, the mass ratio of fatty alcohol polyoxyethylene ether sulfate to dodecylphenol polyoxyethylene ether in the cleaning composition is (1-4): 1.

In some preferred examples, the mass ratio of fatty alcohol polyoxyethylene ether sulfate to dodecylphenol polyoxyethylene ether in the cleaning composition is (1-3) 1; preferably, the mass ratio of the fatty alcohol polyoxyethylene ether sulfate to the dodecylphenol polyoxyethylene ether is 1.5:1.

By controlling the mass ratio between the fatty alcohol polyoxyethylene ether sulfate and the dodecylphenol polyoxyethylene ether, the surface tension of the cleaning composition is reduced by the action of the dodecylphenol polyoxyethylene ether and the ethanol, and meanwhile, the excessive addition of the dodecylphenol polyoxyethylene ether is prevented, foam is generated, the final cleaning effect is reduced, and the operation is not facilitated.

In some examples, the cleaning composition comprises the following components in parts by weight:

when the cleaning agent is placed in the stainless steel liquid tank, when the addition amount of ammonium citrate is excessive, the stainless steel liquid tank can generate a color change phenomenon, which is probably that the ammonium citrate has a slight color change effect on certain alloy elements in the stainless steel liquid tank, so that the addition amount of the ammonium citrate is not excessively large.

In some examples, the mass ratio of aqueous ammonia to ethanol in the cleaning composition is (0.05 to 0.2): 1.

In some preferred examples, the mass ratio of aqueous ammonia to ethanol in the cleaning composition is (0.08-0.11): 1; preferably, the mass ratio of ammonia to ethanol is 0.075:1.

In some preferred examples, the cleaning composition comprises the following components in parts by weight:

in some examples, in the cleaning composition, the fatty alcohol-polyoxyethylene ether sulfate is sodium fatty alcohol-polyoxyethylene ether sulfate.

it is understood that the cleaning agent provided by the invention comprises the cleaning composition, and when the cleaning composition is added with water to 100 parts of the whole, the parts of the components correspond to the corresponding percentage.

In some examples, the pH of the cleaning agent is 8 to 9.

It can be appreciated that the pH of the cleaning agent can be 8, 8.1, 8.2, 8.3, 8.5, 8.7, 9, etc., and the cleaning agent is in a weakly alkaline system, which is beneficial to balancing the acidic system caused by oxidation reaction in the DPF when used for cleaning the DPF, and is beneficial to improving the cleaning effect.

In some examples, the cleaning agent further comprises an inorganic dye.

It will be appreciated that the inorganic dye may be any dye suitable for use in cleaning agents, such as fluorescent yellow or fluorescent green. It will be appreciated that the inorganic dye may not be added.

In some examples, the inorganic dye is added in an amount of 50ppm to 150ppm in the cleaning agent; in some specific examples, the inorganic dye is added in an amount of 100ppm in the cleaning agent.

An embodiment of the present invention provides a method for preparing a cleaning composition, comprising the steps of:

the components of the cleaning composition described above are mixed.

It is understood that citric acid and ammonia may react to form ammonium citrate, that citric acid may be added without adding ammonium citrate, and that the addition amount of ammonia is increased.

An embodiment of the invention provides a cleaning method of a particulate filter, which adopts the cleaning agent to clean.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The following examples of the cleaning composition, the cleaning agent, the preparation method thereof and the cleaning method according to the present invention, it is to be understood that the cleaning composition, the cleaning agent, the preparation method thereof and the cleaning method according to the present invention are not limited to the following examples.

Example 1

The following raw materials are prepared according to mass percent:

0.3% of fatty alcohol polyoxyethylene ether sodium sulfate, 0.5% of sodium phytate, 1% of ammonium citrate, 0.2% of dodecylphenol polyoxyethylene ether, 0.9% of ammonia water, 100ppm of inorganic dye, 12% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.1.

Example 2

The following raw materials are prepared according to mass percent:

0.5% of fatty alcohol polyoxyethylene ether sodium sulfate, 1.0% of sodium phytate, 2% of ammonium citrate, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.8.

Example 3

The following raw materials are prepared according to mass percent:

0.15% of fatty alcohol polyoxyethylene ether sodium sulfate, 0.2% of sodium phytate, 1.5% of ammonium citrate, 0.15% of dodecylphenol polyoxyethylene ether, 0.75% of ammonia water, 100ppm of inorganic dye, 8% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.5.

Example 4

The following raw materials are prepared according to mass percent:

0.4% of fatty alcohol polyoxyethylene ether sodium sulfate, 0.8% of sodium phytate, 1.1% of ammonium citrate, 0.15% of dodecylphenol polyoxyethylene ether, 1.1% of ammonia water, 100ppm of inorganic dye, 10% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.6.

Comparative example 1

Substantially the same as in example 2, except that sodium fatty alcohol-polyoxyethylene ether sulfate (AES) was replaced with fatty alcohol-polyoxyethylene ether (peregal O); the method comprises the following steps:

the following raw materials are prepared according to mass percent:

0.5% of fatty alcohol polyoxyethylene ether, 1% of sodium phytate, 2% of ammonium citrate, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the cleaning agent has transparent appearance and pH value of 8.7.

Comparative example 2

Substantially the same as in example 2, except that sodium fatty alcohol polyoxyethylene ether sulfate (AES) was replaced with coconut oil alkanolamide phosphate; the method comprises the following steps:

0.5% of coconut oil alkanolamide phosphate, 1% of sodium phytate, 2% of ammonium citrate, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.4.

Comparative example 3

The following raw materials are prepared according to mass percent:

0.8% of fatty alcohol polyoxyethylene ether sodium sulfate, 0.8% of phytic acid, 1.8% of ammonium citrate, 0.1% of dodecylphenol polyoxyethylene ether, 0.6% of ammonia water, 100ppm of inorganic dye, 5% of ethanol and the balance of deionized water;

Comparative example 4

Substantially the same as in example 2, except that ammonia water was not contained; the method comprises the following steps:

0.5% of fatty alcohol polyoxyethylene ether sodium sulfate, 2% of ammonium citrate, 1% of sodium phytate, 0.16% of dodecylphenol polyoxyethylene ether, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, ammonium citrate and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the cleaning agent has clear and transparent appearance and pH value of 7.5.

Comparative example 5

Substantially the same as in example 2, except that no dodecylphenol polyoxyethylene ether was contained, the addition amount of the fatty alcohol polyoxyethylene ether sulfate was the sum of the addition amounts of the fatty alcohol polyoxyethylene ether sulfate and the dodecylphenol polyoxyethylene ether in example 2, and specifically, the following was adopted:

0.65% of fatty alcohol polyoxyethylene ether sodium sulfate, 1% of sodium phytate, 2% of ammonium citrate, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the DPF cleaning agent, wherein the DPF cleaning agent is clear and transparent in appearance and has a pH value of 8.8.

Comparative example 6

Substantially the same as in example 2, except that ethanol was not contained, the following was made:

0.5% of fatty alcohol polyoxyethylene ether sodium sulfate, 1% of sodium phytate, 2% of ammonium citrate, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye and the balance of deionized water;

and sequentially adding fatty alcohol polyoxyethylene ether sodium sulfate, dodecylphenol polyoxyethylene ether, sodium phytate, ammonium citrate, ammonia water and inorganic dye into deionized water to obtain the cleaning agent, wherein the cleaning agent has transparent appearance and pH value of 8.8.

Comparative example 7

Substantially the same as in example 2, except that the percentages of the components are different, the following are specified:

1.6% of fatty alcohol polyoxyethylene ether sodium sulfate, 1% of sodium phytate, 1% of ammonium citrate, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, citric acid, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 8.5.

Comparative example 8

0.5% of fatty alcohol polyoxyethylene ether sodium sulfate, 0.1% of sodium phytate, 5% of citric acid, 0.16% of dodecylphenol polyoxyethylene ether, 1.2% of ammonia water, 100ppm of inorganic dye, 15% of ethanol and the balance of deionized water;

and sequentially adding sodium fatty alcohol-polyoxyethylene ether sulfate, dodecylphenol-polyoxyethylene ether, sodium phytate, citric acid, ammonia water and inorganic dye into deionized water, and then adding ethanol to obtain the cleaning agent, wherein the appearance of the cleaning agent is clear and transparent, and the pH value is 9.4.

The components and mass percentages of examples 1 to 5 and comparative examples 1 to 8 are shown in Table 1.

TABLE 1

The cleaning agents of examples 1 to 5 and comparative examples 1 to 8 were each tested for surface tension and left for 3 months, and their stability was tested, and the results are shown in Table 2.

Randomly extracting DPF samples disassembled due to vehicle backpressure alarm, and dividing the DPF samples into 12 groups of 5 DPF samples; adopting compressed air to purge, and recording the ash containing amount, namely the ash containing amount before cleaning; cleaning the DPF sample by adopting the cleaning agents of the examples 1-5 and the comparative examples 1-8 on special cleaning equipment, drying the DPF sample, weighing the ash containing amount, namely the ash containing amount after cleaning, and calculating the cleaning efficiency; cleaning efficiency= (ash content before cleaning-ash content after cleaning)/ash content before cleaning x 100%; the results are shown in Table 2.

TABLE 2

From Table 2, it is clear that the surfactant and ethanol are combined and interact with each other, which can effectively reduce the surface tension of the cleaning agent and further affect the ash removal effect.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present invention, which facilitate a specific and detailed understanding of the technical solutions of the present invention, but are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. It should be understood that, based on the technical solutions provided by the present invention, those skilled in the art may obtain technical solutions through logical analysis, reasoning or limited experiments, which are all within the scope of protection of the appended claims. The scope of the patent of the invention should therefore be determined with reference to the appended claims, which are to be construed as in accordance with the doctrines of claim interpretation.

Claims

1. A cleaning composition, which is characterized by comprising the following components in parts by mass:

water;

the mass ratio of the fatty alcohol polyoxyethylene ether sulfate to the dodecylphenol polyoxyethylene ether is (1-4) 1, and the pH value of the cleaning composition is 8-9.

2. The cleaning composition according to claim 1, wherein the fatty alcohol polyoxyethylene ether sulfate is 0.15 to 0.5 parts by mass in the cleaning composition.

3. The cleaning composition according to claim 1, wherein the mass ratio of the fatty alcohol-polyoxyethylene ether sulfate to the dodecylphenol polyoxyethylene ether is (1 to 3): 1.

4. The cleaning composition of claim 1, comprising the following components in parts by weight:

5. the cleaning composition of claim 4, comprising the following components in parts by weight:

6. the cleaning composition according to any one of claims 1 to 4, wherein the fatty alcohol-polyoxyethylene ether sulfate is sodium fatty alcohol-polyoxyethylene ether sulfate.

7. The cleaning agent is characterized by comprising the following components in percentage by mass:

the balance of water;

the mass ratio of the fatty alcohol polyoxyethylene ether sulfate to the dodecylphenol polyoxyethylene ether is (1-4) 1, and the pH value of the cleaning agent is 8-9.

8. The preparation method of the cleaning agent is characterized by comprising the following steps of:

the components of the cleaning agent of claim 7 are mixed.

9. A cleaning method of a particulate filter, characterized in that the cleaning is performed with the cleaning agent according to claim 7.