A formaldehyde removal liquid product

Abstract

This application discloses a formaldehyde removal aqueous product, relating to the field of cleaning and purification technology, comprising a solvent, a formaldehyde remover, a stabilizer, and a wetting agent; wherein the solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 9-31:1.2-8:0.3-0.8:15-23; the formaldehyde remover is M-R2. This application achieves effective formaldehyde removal by forming abundant active sites in the formaldehyde remover, thereby effectively adsorbing and releasing formaldehyde while efficiently oxidizing the adsorbed formaldehyde; furthermore, the solvent, formaldehyde remover, stabilizer, and wetting agent in this aqueous formaldehyde removal product synergistically work together to remove formaldehyde, significantly improving the efficiency of adsorbing and releasing formaldehyde while promptly oxidizing formaldehyde to form carbon dioxide. Moreover, the components of this aqueous formaldehyde removal product have a stable structure and high formaldehyde removal efficiency.

Description

Technical Field

[0001] This application relates to the field of cleaning and purification technology, and in particular to a water-based formaldehyde removal product. Background Technology

[0002] Formaldehyde, a colorless gas, has a pungent odor and irritates the eyes and nose. When formaldehyde reaches a certain concentration indoors, people experience discomfort. Formaldehyde concentrations greater than 0.08 mg / m³ can cause red and itchy eyes, throat discomfort or pain, hoarseness, sneezing, chest tightness, wheezing, and dermatitis. Newly renovated rooms often have high formaldehyde levels, a major contributing factor to many diseases.

[0003] Chinese Patent CN112956490B discloses a method for preparing a solid slow-release disinfectant for formaldehyde removal and air disinfection / odor removal. The method includes the following steps: Step 1: Mixing and stirring a gelling agent, water-soluble salt, and solid particles to obtain a first mixture; Step 2: Laying the first mixture on the bottom and side walls of a mold, wherein the bottom and side walls of the mold are provided with water-filtering holes; Step 3: Injecting water into the first mixture laid in the mold to completely wet the first mixture inside the mold, and then drying it to obtain... Step 4: Mix sodium chlorite powder, hydrochloric acid powder, and absorbent agent until homogeneous to obtain disinfectant powder; Step 5: Lay a sponge inside the shell, then place the disinfectant powder in the middle of the sponge, and then cover the disinfectant powder with a waterproof membrane; Step 6: Add water to the first mixture to form a mud-like mixture, then lay the mud mixture on the waterproof membrane to seal the opening of the shell; Step 7: Insert multiple thin tubes into the mud mixture laid at the opening of the shell, with one end of the thin tube passing through the waterproof membrane, then dry them, and after drying, pull out the thin tubes to obtain the disinfectant.

[0004] However, this disinfectant requires the absorption of external moisture to induce a reaction between sodium chlorite and hydrochloric acid inside the casing, generating chlorine dioxide gas. This chlorine dioxide gas is then used to purify formaldehyde. Low air humidity affects the disinfectant's effectiveness, and the generated chlorine dioxide gas is difficult to remove formaldehyde efficiently and promptly, thus limiting its application. Furthermore, the method of removing formaldehyde solely through the reaction of generated chlorine dioxide with formaldehyde is inefficient and ineffective, requiring further improvement. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a water-based formaldehyde removal product to effectively remove formaldehyde. The specific solution is as follows:

[0006] A formaldehyde removal aqueous product includes a solvent, a formaldehyde remover, a stabilizer, and a wetting agent; wherein:

[0007] The solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 9-31:1.2-8:0.3-0.8:15-23.

[0008] The formaldehyde removal agent is M-R2;

[0009] R is And n1 is 0 or 1; R1, R2, and R3 are selected from at least one of halogen atoms and hydroxyl groups; X is N or S;

[0010] M is or Mn 2+ ;

[0011] A is -H, -OH or -O-Si(CH3)3.

[0012] Preferably, at least one of R1, R2, and R3 is a C1-8 straight-chain or branched alkyl group, and at least one is a halogen atom or a hydroxyl group.

[0013] Preferably, the solvent is water and / or an organic solvent.

[0014] Preferably, the wetting agent is at least one selected from fatty alcohol polyoxyethylene ether, sodium sarcosinate, polyoxyethylene fatty acid diester, polyoxyethylene ether, and alkyl glycoside.

[0015] Preferably, the stabilizer is at least one selected from nanocellulose, guar gum, sodium dodecyl sulfate, and sodium lignosulfonate.

[0016] Preferably, A is -H, and the formaldehyde remover uses anhydrous tetrahydrofuran as the reaction solvent, and R-Mg-Br and diethyl phosphite or manganese acetate in a molar ratio of 2:1 are added dropwise into the reaction solvent and stirred to obtain the formaldehyde remover.

[0017] Preferably, A is -OH.

[0018] Preferably, the formaldehyde removal agent uses anhydrous tetrahydrofuran as the reaction solvent, and R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. Then, an acetonitrile / ethanol mixture with a volume ratio of 1 is added to intermediate I. A fluorinating agent is added during stirring, and the mixture is stirred at 60°C for at least 6 hours and then distilled under reduced pressure to obtain the final product.

[0019] Preferably, A is -O-Si(CH3)3.

[0020] Preferably, the formaldehyde removal agent uses anhydrous tetrahydrofuran as the reaction solvent, and R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. Then, an acetonitrile / ethanol mixture with a volume ratio of 1 is added to intermediate I. A fluorinating agent is added while stirring, and the mixture is stirred at 60°C for at least 6 hours and then distilled under reduced pressure to obtain intermediate II. Then, a catalyst is added to intermediate II and stirred evenly. Finally, trimethylsilane chloride is added dropwise to obtain intermediate II. The catalyst used is triethylamine and dichloromethane.

[0021] As can be seen from the above solutions, this application provides a formaldehyde removal liquid product, which has the following beneficial effects:

[0022] 1. By utilizing the electronegativity of halogen atoms to achieve coordination with M and the hydrophilicity of hydroxyl groups, the catalytic oxidation ability of M on formaldehyde is enhanced, so that this formaldehyde removal water-based product can effectively remove formaldehyde.

[0023] 2. By forming abundant active sites in the formaldehyde removal agent, it can effectively adsorb and release formaldehyde while efficiently oxidizing the adsorbed formaldehyde, thereby achieving the purpose of effectively removing formaldehyde.

[0024] 3. By having the solvent, formaldehyde remover, stabilizer, and wetting agent in the formaldehyde removal liquid product work synergistically to remove formaldehyde, the efficiency of adsorption and release of formaldehyde is significantly improved, while the formaldehyde is oxidized in time to form carbon dioxide. Moreover, the composition of the formaldehyde removal liquid product is structurally stable and has a high efficiency in removing formaldehyde. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that the following will specifically describe the formaldehyde removal liquid product of this application. Furthermore, the purification of the product and other related techniques are conventional and will not be elaborated upon here.

[0027] A formaldehyde removal aqueous product includes a solvent, a formaldehyde remover, a stabilizer, and a wetting agent. The solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 9-31:1.2-8:0.3-0.8:15-23. The solvent is water and / or an organic solvent. The wetting agent is at least one selected from fatty alcohol polyoxyethylene ether, sodium sarcosinate, polyoxyethylene fatty acid diester, polyoxyethylene ether, and alkyl glycoside. The stabilizer is at least one selected from nanocellulose, guar gum, sodium dodecyl sulfate, and sodium lignosulfonate.

[0028] It should be mentioned that the preparation of this formaldehyde removal water-based product involves mixing solvent, formaldehyde remover, stabilizer, and wetting agent in a specific weight ratio, controlling the mixing temperature at 10-25℃ and the storage temperature at 0-25℃. Furthermore...

[0029] To enhance the adsorption and oxidation capabilities of formaldehyde, thereby achieving efficient formaldehyde removal, formaldehyde removal agents are prepared using a synthetic process.

[0030] Specifically, the synthesized formaldehyde remover is M-R2.

[0031] in:

[0032] R is And n1 is 0 or 1; R1, R2, and R3 are selected from at least one of halogen atoms and hydroxyl groups; X is N or S;

[0033] M is or Mn 2+ ;

[0034] A is -H, -OH or -O-Si(CH3)3.

[0035] Example 1

[0036] A water-based formaldehyde removal product includes a solvent, a formaldehyde remover, a stabilizer, and a wetting agent. The solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 9:1.2:0.8:15. The solvent is water and an organic solvent. The wetting agent is fatty alcohol polyoxyethylene ether and alkyl glycoside. The stabilizer is nanocellulose.

[0037] It should be mentioned that the preparation of this formaldehyde removal water-based product can be achieved by mixing solvent, formaldehyde removal agent, stabilizer and wetting agent in a weight ratio, and the mixing temperature is controlled at 10℃ and the storage temperature is 0-25℃.

[0038] To enhance the adsorption and oxidation capabilities of formaldehyde, thereby achieving efficient formaldehyde removal, formaldehyde removal agents are prepared using a synthetic process.

[0039] Specifically, the synthesized formaldehyde remover is M-R2.

[0040] in:

[0041] R is And n1 is 1; R1 is -OH, R2 is -OH, R3 is -Cl; X is N;

[0042] M is

[0043] A is -H.

[0044] It should be noted that the formaldehyde removal agent in this Example 1 uses anhydrous tetrahydrofuran as the reaction solvent, and is obtained by adding R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 dropwise into the reaction solvent and stirring. The temperature of the reaction solvent should be controlled below 10°C, and further purification is optional.

[0045] Example 2

[0046] A water-based formaldehyde removal product includes a solvent, a formaldehyde remover, a stabilizer, and a wetting agent. The solvent, formaldehyde remover, stabilizer, and wetting agent are distributed in a weight ratio of 31:8:0.8:23. The solvent is water. The wetting agent is at least one selected from fatty alcohol polyoxyethylene ether, sodium sarcosinate, polyoxyethylene fatty acid diester, polyoxyethylene ether, and alkyl glycoside. The stabilizer is at least one selected from nanocellulose, guar gum, sodium dodecyl sulfate, and sodium lignosulfonate.

[0047] It should be mentioned that the preparation of this formaldehyde removal water-based product can be achieved by mixing solvent, formaldehyde removal agent, stabilizer and wetting agent in a weight ratio, and the mixing temperature is controlled at 18℃ and the storage temperature is 0-25℃.

[0048] To enhance the adsorption and oxidation capabilities of formaldehyde, thereby achieving efficient formaldehyde removal, formaldehyde removal agents are prepared using a synthetic process.

[0049] Specifically, the synthesized formaldehyde remover is M-R2.

[0050] in:

[0051] R is And n1 is 1; R1 is -OH, R2 is -F, R3 is -Cl; X is N;

[0052] M is

[0053] A is -H.

[0054] It should be noted that the formaldehyde remover in this Example 2 uses anhydrous tetrahydrofuran as the reaction solvent, and is obtained by adding R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 dropwise into the reaction solvent and stirring. The temperature of the reaction solvent should be controlled below 10°C, and further purification is optional.

[0055] Example 3

[0056] A formaldehyde removal aqueous product includes a solvent, a formaldehyde remover, a stabilizer, and a wetting agent. The solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 31:1.2:0.3:15. The solvent is an organic solvent. The wetting agent is at least one selected from fatty alcohol polyoxyethylene ether, sodium sarcosinate, polyoxyethylene fatty acid diester, polyoxyethylene ether, and alkyl glycoside. The stabilizer is at least one selected from nanocellulose, guar gum, sodium dodecyl sulfate, and sodium lignosulfonate.

[0057] It should be mentioned that the preparation of this formaldehyde removal water-based product can be achieved by mixing solvent, formaldehyde removal agent, stabilizer and wetting agent in a weight ratio, and the mixing temperature is controlled at 25℃ and the storage temperature is 0-25℃.

[0058] To enhance the adsorption and oxidation capabilities of formaldehyde, thereby achieving efficient formaldehyde removal, formaldehyde removal agents are prepared using a synthetic process.

[0059] Specifically, the synthesized formaldehyde remover is M-R2.

[0060] in:

[0061] R is And n1 is 0; R1 is -Cl, R2 is -OH, R3 is -OH; X is S;

[0062] M is

[0063] A is -H.

[0064] It should be noted that the formaldehyde remover in Example 3 uses anhydrous tetrahydrofuran as the reaction solvent, and is obtained by adding R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 dropwise into the reaction solvent and stirring. The temperature of the reaction solvent should be controlled below 10°C, and further purification is optional.

[0065] Example 4

[0066] The difference between Example 4 and Example 1 is that in Example 4, at least one of R1, R2, and R3 is a C1-8 straight-chain or branched alkyl group, and at least one is a halogen atom or a hydroxyl group. Specifically, R1 is -C2H5, R3 is a branched -OH, and R2 is -Cl.

[0067] Example 5

[0068] The difference between Example 5 and Example 1 is that M in Example 5 is Mn. 2+ That is, the formaldehyde removal agent is R-Mn-R.

[0069] It should be noted that the formaldehyde removal agent in Example 5 uses anhydrous tetrahydrofuran as the reaction solvent, and is obtained by adding R-Mg-Br and manganese acetate in a molar ratio of 2:1 dropwise into the reaction solvent and stirring. The temperature of the reaction solvent should be controlled to be below 10°C, and further purification is optional.

[0070] Example 6

[0071] The difference between Example 6 and Example 1 is that A in Example 6 is -OH. Furthermore, the formaldehyde removal agent in Example 6 uses anhydrous tetrahydrofuran as the reaction solvent. R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. The temperature of the reaction solvent is controlled to be below 10°C. An acetonitrile / ethanol mixture with a volume ratio of 1 is then added to the extracted intermediate I. Selectfluor fluorinating agent is added while stirring, and the mixture is stirred at 60°C for at least 6 hours and then distilled under reduced pressure. Further purification is optional.

[0072] Example 7

[0073] The difference between Example 7 and Example 1 is that A in Example 7 is -O-Si(CH3)3. Furthermore, the formaldehyde removal agent in Example 7 uses anhydrous tetrahydrofuran as the reaction solvent. R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. The temperature of the reaction solvent is controlled to be below 10°C. An acetonitrile / ethanol mixture with a volume ratio of 1 is then added to the extracted intermediate I. Selectfluor fluorinating agent is added while stirring, and the mixture is stirred at 60°C for at least 6 hours, followed by vacuum distillation to obtain intermediate II. A catalyst is then added to the extracted intermediate II and stirred until homogeneous. Trimethylsilane chloride is then added dropwise to obtain intermediate II. The catalyst used is triethylamine and dichloromethane. The temperature of the stirring system is controlled to be below 10°C, and further purification is optional.

[0074] Comparative Example 1

[0075] The difference between Comparative Example 1 and Example 1 is that R1, R2, and R3 in Comparative Example 1 are all -H.

[0076] Comparative Example 2

[0077] The difference between Comparative Example 2 and Example 4 is that R3 in Comparative Example 2 is -H.

[0078] Comparative Example 3

[0079] The difference between Comparative Example 3 and Example 7 is that R1 and R2 in Comparative Example 3 are both -H.

[0080] test:

[0081] Formaldehyde was introduced into a sealed space and the formaldehyde concentration was controlled at 100 mg / L. The formaldehyde removal liquid product was then sprayed into the sealed space. The remaining formaldehyde concentration in the sealed space was analyzed after 30 minutes and 60 minutes, respectively.

[0082] Calculate the formaldehyde removal rate, i.e., formaldehyde removal rate % = 100 * (100 mg / L - remaining formaldehyde concentration) / (100 mg / L).

[0083]

[0084]

[0085] Therefore, the formaldehyde removal liquid product of this application effectively removes formaldehyde during use, and has a long-lasting, high-efficiency, and stable effect. Specifically, R1, R2, and R3 significantly enhance the adsorption and oxidation effects of this formaldehyde removal agent on formaldehyde.

[0086] In summary, this application provides a formaldehyde removal aqueous product. This formaldehyde removal aqueous product enhances the catalytic oxidation ability of M on formaldehyde by utilizing the electronegativity of halogen atoms to achieve coordination with M and the hydrophilicity of hydroxyl groups, thereby achieving the purpose of effectively removing formaldehyde. At the same time, by forming abundant active sites in the formaldehyde removal agent, it can effectively adsorb and release formaldehyde while efficiently oxidizing the adsorbed formaldehyde, thus achieving the purpose of effectively removing formaldehyde. Furthermore, because the solvent, formaldehyde removal agent, stabilizer, and wetting agent in this formaldehyde removal aqueous product work synergistically to remove formaldehyde, it can significantly improve the efficiency of adsorbing and releasing formaldehyde while promptly oxidizing formaldehyde to form carbon dioxide. This makes the composition of the formaldehyde removal aqueous product structurally stable and has a high formaldehyde removal efficiency.

[0087] The terms “first,” “second,” “third,” “fourth,” etc., used in this application (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, or apparatus.

[0088] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0089] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A formaldehyde-removing aqueous product, characterized in that: Includes solvents, formaldehyde removers, stabilizers, and wetting agents; among which: The solvent, formaldehyde remover, stabilizer, and wetting agent are present in a weight ratio of 9-31:1.2-8:0.3-0.8:15-23. The formaldehyde removal agent is RMR; R is And n1 is 0 or 1; R1, R2, and R3 are selected from at least one of halogen atoms and hydroxyl groups; X is N; M is or Mn 2+ ; A is -H, -OH or -O-Si(CH3)3.

2. The formaldehyde removal aqueous product according to claim 1, characterized in that: At least one of R1, R2, and R3 is a C1-8 straight-chain or branched alkyl group, and at least one is a halogen atom or a hydroxyl group.

3. The formaldehyde removal aqueous product according to claim 1, characterized in that: The solvent is water, or a mixture of water and an organic solvent.

4. The formaldehyde removal aqueous product according to claim 1, characterized in that: The wetting agent is at least one of fatty alcohol polyoxyethylene ether, sodium sarcosinate, polyoxyethylene fatty acid diester, and alkyl glycoside.

5. The formaldehyde removal aqueous product according to claim 1, characterized in that: The stabilizer is at least one of nanocellulose, guar gum, sodium dodecyl sulfate, and sodium lignosulfonate.

6. The formaldehyde removal aqueous product according to claim 1, characterized in that: The A is -H, and the formaldehyde removal agent uses anhydrous tetrahydrofuran as the reaction solvent. R-Mg-Br and diethyl phosphite or manganese acetate in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain the formaldehyde removal agent.

7. The formaldehyde removal aqueous product according to claim 1, characterized in that: A is -OH, and M is... .

8. The formaldehyde removal aqueous product according to claim 7, characterized in that: The formaldehyde removal agent uses anhydrous tetrahydrofuran as the reaction solvent. R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. Then, an acetonitrile / ethanol mixture with a volume ratio of 1 is added to intermediate I. A fluorinating agent is added during stirring, and the mixture is stirred at 60°C for at least 6 hours and then distilled under reduced pressure to obtain the final product.

9. The formaldehyde removal aqueous product according to claim 1, characterized in that: A is -O-Si(CH3)3, and M is... .

10. A formaldehyde-removing aqueous product according to claim 9, characterized in that: The formaldehyde removal agent uses anhydrous tetrahydrofuran as the reaction solvent. R-Mg-Br and diethyl phosphite in a molar ratio of 2:1 are added dropwise to the reaction solvent and stirred to obtain intermediate I. Then, an acetonitrile / ethanol mixture with a volume ratio of 1 is added to intermediate I. A fluorinating agent is added while stirring, and the mixture is stirred at 60°C for at least 6 hours and then distilled under reduced pressure to obtain intermediate II. A catalyst is added to intermediate II and stirred evenly. Trimethylsilane chloride is then added dropwise to obtain intermediate II. The catalyst used is triethylamine and dichloromethane.

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