Deodorizing composition, compound deodorant and preparation method and application thereof

Abstract

The invention provides a deodorant composition, a composite deodorant and a preparation method and application thereof. The deodorizing composition comprises zinc oxide nanoparticles and a folium eucalypti extracting solution. The odor removal composition disclosed by the invention is remarkable in removal efficiency of irritant gases and has a relatively high antibacterial rate.

Description

Technical Field

[0001] This invention relates to the field of deodorizing products technology, specifically to a deodorizing composition, a composite deodorizing agent, its preparation method, and its application. Background Technology

[0002] Traditional deodorization methods include physical, chemical, and biological methods. Physical methods include adsorption, masking, and dilution-diffusion. Chemical methods include chemical washing and catalytic oxidation. Biological methods include spraying plant extracts, adding microbial agents, biofiltration, biowashing, and bioabsorption.

[0003] Most deodorizers currently on the market rely on physical methods, namely masking odors. These methods cannot quickly remove odors, nor can they reduce the harm of harmful gases to the human body. Therefore, it is necessary to develop a new type of deodorizer. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a deodorizing composition, a composite deodorizing agent, its preparation method and application.

[0005] A first aspect of the present invention provides an odor-removing composition comprising zinc oxide nanoparticles and eucalyptus leaf extract.

[0006] Zinc oxide nanoparticles can adsorb and decompose irritating gases while also possessing antibacterial activity. Eucalyptus leaf extract contains various bioactive components, such as flavonoids, phenols, and organic acids, which have antioxidant and antibacterial effects. Simultaneously, the active ingredients in the plant extracts can adsorb odor molecules and react chemically with them, altering the structure of the odor molecules to achieve deodorization. This invention, through the synergistic effect between zinc oxide nanoparticles and eucalyptus leaf extract, achieves rapid deodorization while also providing long-lasting antibacterial properties, addressing the problem of microbial growth. Compared to chemically synthesized deodorizers, the deodorizing composition of this invention uses safe, non-toxic, and biodegradable raw materials, making it environmentally friendly.

[0007] In some embodiments, the mass ratio of the zinc oxide nanoparticles to the eucalyptus extract is 1:(5-20); for example, 1:5, 1:7, 1:10, 1:12, 1:15, 1:17, 1:20, or any value between them. When the mass ratio of zinc oxide nanoparticles to eucalyptus extract is within the above range, the removal rate of irritating gases and the bacterial inhibition rate are optimal.

[0008] In some embodiments, the zinc oxide nanoparticles have a particle size of 1-20 nm, for example, 1 nm, 5 nm, 10 nm, 15 nm, 20 nm, or any value between them. Zinc oxide nanoparticles with a particle size within the above range have the advantages of small particle size and high dispersibility, and exhibit strong reactivity with irritating gases, thus effectively removing irritating gases.

[0009] In some embodiments, the eucalyptus leaf extract is an aqueous extract.

[0010] In some embodiments, the preparation method of the eucalyptus leaf extract includes: using water as the extraction solvent, with a material-to-liquid ratio of eucalyptus leaf powder to water of 1:(10-20), extracting at 10-30℃ for 1-5 h, concentrating to near dryness, adding ethanol to precipitate, cooling, centrifuging to obtain supernatant and precipitate, wherein the supernatant is the eucalyptus leaf extract.

[0011] In some embodiments, the ethanol mass concentration is 80-95%, for example 80%, 85%, 90%, 95% or any value between them.

[0012] In some embodiments, the method for preparing the zinc oxide nanoparticles includes: The zinc oxide nanoparticles are obtained by mixing and reacting zinc salt, dimethyl sulfone, solvent and KOH.

[0013] In some embodiments, the zinc salt may be zinc nitrate, zinc acetate, etc.

[0014] In some embodiments, the concentration of the zinc salt is 0.005-0.05M, for example 0.005M, 0.007M, 0.01M, 0.012M, 0.015M, 0.02M, 0.03M, 0.04M, 0.05M or any value between them.

[0015] In some embodiments, the solvent may be methanol.

[0016] In some embodiments, the reaction temperature is 50-80°C, for example 50°C, 60°C, 70°C, 80°C or any value between them.

[0017] In some implementations, the reaction time is 3-12 hours, for example, 3 hours, 5 hours, 7 hours, 9 hours, 11 hours, 12 hours or any value between them.

[0018] In some embodiments, the method for preparing the nano-zinc oxide particles includes: 0.015 M zinc salt and 0.1 g dimethyl sulfone were first dissolved in 80 mL of methanol at 60 °C with continuous stirring at 60 °C. Then, 40 mL of 0.001 M KOH was added at a rate of 1 mL per minute, maintaining the reaction temperature at 60 °C. After 3 and 12 hours of reaction, ZnO nanoparticles of 4 nm and 10 nm were obtained, respectively. The precipitate was washed three times with ethanol to remove soluble impurities, then dried at 65 °C for 12 hours and stored at room temperature (10–30 °C).

[0019] A second aspect of the present invention provides a composite deodorizing agent comprising the deodorizing composition described in the first aspect.

[0020] In some embodiments, the composite deodorizer further includes an activator. Adding an activator to the composite deodorizer can prevent liquid stratification and sedimentation after prolonged use, further extending the service life of the composite deodorizer.

[0021] In some embodiments, the activator is selected from polymeric plant esters.

[0022] In some embodiments, the activator is selected from plant ester PT-11.

[0023] In some embodiments, the mass ratio of the activator to the eucalyptus extract is 1:(0.5-2), for example, 1:0.5, 1:1, 1:1.5, 1:2 or any value between them.

[0024] A third aspect of the present invention provides a method for preparing a composite deodorizing agent, comprising the following steps: (1) Zinc oxide nanoparticles were mixed with pure water to obtain a zinc oxide solution; (2) The eucalyptus leaf extract, an optional activator, and the zinc oxide solution are mixed to obtain a mixed solution; (3) The mixed solution is subjected to solid-liquid separation to obtain the precipitate and the composite deodorizer.

[0025] The preparation method of this invention is low in cost, low in energy consumption, and simple to operate. It can effectively remove irritating gases and also has antibacterial activity. Furthermore, the raw materials are safe, non-toxic, biodegradable, environmentally friendly, and easy to promote and apply.

[0026] In some embodiments, in step (1), the particle size of the zinc oxide nanoparticles is 1-20 nm, for example, 1 nm, 5 nm, 10 nm, 15 nm, 20 nm or any value between them.

[0027] In some embodiments, in step (1), the mass of the zinc oxide nanoparticles is 0.01-0.5% of the zinc oxide solution, for example, 0.01%, 0.05%, 0.07%, 0.08%, 0.09%, 0.1%, 0.11%, 0.12%, 0.13%, 0.15%, 0.2%, 0.3%, 0.4%, 0.5% or any value between them.

[0028] In some embodiments, in step (1), the mass of the zinc oxide nanoparticles is 0.01-0.2% of the zinc oxide solution.

[0029] In some embodiments, in step (1), the mass of the zinc oxide nanoparticles is 0.05-0.15% of the zinc oxide solution.

[0030] In some embodiments, the concentration of the zinc oxide nanoparticles is 0.5-5 mg / mL, for example, 0.5 mg / mL, 0.8 mg / mL, 0.9 mg / mL, 1 mg / mL, 1.1 mg / mL, 1.2 mg / mL, 1.5 mg / mL, 2 mg / mL, 4 mg / mL, 5 mg / mL or any value between them.

[0031] In some embodiments, the mixing temperature in step (1) is 20-50°C; for example, 20°C, 25°C, 30°C, 35°C, 40°C, 50°C, or any value between them. The above preparation method can react under low temperature conditions, and the preparation method is simple and energy-efficient.

[0032] In some implementations, the mixing time in step (1) is 0.5-2h, for example, 0.5h, 1h, 1.5h, 2h or any value between them.

[0033] In some embodiments, the method for preparing the zinc oxide nanoparticles includes: The zinc oxide nanoparticles are obtained by mixing and reacting zinc salt, dimethyl sulfone, solvent and KOH.

[0034] In some embodiments, the zinc salt may be zinc nitrate, zinc acetate, etc.

[0035] In some embodiments, the concentration of the zinc salt is 0.005-0.05M, for example 0.005M, 0.007M, 0.01M, 0.012M, 0.015M, 0.02M, 0.03M, 0.04M, 0.05M or any value between them.

[0036] In some embodiments, the solvent may be methanol.

[0037] In some embodiments, the reaction temperature is 50-80°C, for example 50°C, 60°C, 70°C, 80°C or any value between them.

[0038] In some implementations, the reaction time is 3-12 hours, for example, 3 hours, 5 hours, 7 hours, 9 hours, 11 hours, 12 hours or any value between them.

[0039] In some embodiments, the eucalyptus leaf extract is an aqueous extract.

[0040] In some embodiments, the preparation method of the eucalyptus leaf extract includes: using water as the extraction solvent, the ratio of eucalyptus leaf powder to water is 1:(10-20), extracting at 10-30℃ for 1-5 h, concentrating to near dryness, adding ethanol to precipitate, cooling, centrifuging to obtain supernatant and precipitate, wherein the supernatant is the eucalyptus leaf extract. Preferably, the mass concentration of the ethanol is 80-95%, for example, 80%, 85%, 90%, 95% or any value between them.

[0041] In some embodiments, the mass ratio of the zinc oxide nanoparticles to the eucalyptus extract is 1:(5-20); for example, 1:5, 1:7, 1:10, 1:12, 1:15, 1:17, 1:20 or any value between them.

[0042] In some embodiments, the activator is selected from polymeric plant esters.

[0043] In some embodiments, the activator is selected from plant ester PT-11.

[0044] In some embodiments, the mass ratio of the activator to the eucalyptus extract is 1:(0.5-2), for example, 1:0.5, 1:1, 1:1.5, 1:2 or any value between them.

[0045] In some embodiments, the solid-liquid separation method includes, but is not limited to, centrifugation. Other solid-liquid separation methods, such as filtration, can also be applied to this invention.

[0046] In some embodiments, the centrifugation speed is 2000-4000 r / min, for example 2000 r / min, 2500 r / min, 3000 r / min, 3500 r / min, 4000 r / min or any value between them.

[0047] In some embodiments, the solid-liquid separation time is 5-20 min, for example 5 min, 10 min, 15 min, 20 min or any value between them.

[0048] The fourth aspect of the present invention provides the application of the deodorizing composition described in the first aspect, the composite deodorizing agent described in the second aspect, or the composite deodorizing agent prepared by the preparation method described in the third aspect in removing irritating gases.

[0049] In some embodiments, the irritant gas is selected from one or more of ammonia, hydrogen sulfide, or dimethyl sulfide.

[0050] In some embodiments, the initial concentration of ammonia is 1-2 mg / m³. 3 For example, 1 mg / m 3 1.2 mg / m 3 1.4 mg / m 3 1.6 mg / m 3 1.8 mg / m 3 2 mg / m 3 Or any value between them.

[0051] In some embodiments, the initial concentration of hydrogen sulfide is 0.1-0.2 mg / m³. 3 For example, 0.1 mg / m 3 0.12 mg / m 3 0.14 mg / m 3 0.16 mg / m 3 0.18 mg / m 3 0.2 mg / m 3 Or any value between them.

[0052] In some embodiments, the initial concentration of the dimethyl sulfide is 0.05-0.15 mg / m³. 3 For example, 0.05 mg / m 3 0.07 mg / m 3 0.09 mg / m 3 0.10 mg / m 3 0.11 mg / m 3 0.12 mg / m 3 0.13 mg / m 3 0.14 mg / m 3 0.15 mg / m 3 Or any value between them.

[0053] In some embodiments, the composite deodorizing agent has an ammonia removal rate of ≥85%. In some embodiments, the composite deodorizing agent has an ammonia removal rate of ≥90%.

[0054] In some embodiments, the composite deodorizing agent has a hydrogen sulfide removal rate of ≥75%. In some embodiments, the composite deodorizing agent has a hydrogen sulfide removal rate of ≥85%. In some embodiments, the composite deodorizing agent has a hydrogen sulfide removal rate of ≥90%.

[0055] In some embodiments, the composite deodorizing agent has a removal rate of ≥75% for methyl sulfide. In some embodiments, the composite deodorizing agent has a removal rate of ≥85% for methyl sulfide. In some embodiments, the composite deodorizing agent has a removal rate of ≥90% for methyl sulfide.

[0056] The fifth aspect of the present invention provides the application of the deodorizing composition described in the first aspect, the composite deodorizing agent described in the second aspect, or the composite deodorizing agent prepared by the preparation method described in the third aspect in the field of bacterial inhibition.

[0057] In some embodiments, the bacteria are Escherichia coli and / or Staphylococcus aureus.

[0058] In some embodiments, the compound deodorizer has an antibacterial rate of over 95% against Escherichia coli and / or Staphylococcus aureus.

[0059] The sixth aspect of the present invention provides a method of using a composite deodorizing agent, comprising: diluting the composite deodorizing agent described in the second aspect or the composite deodorizing agent prepared by the preparation method described in the third aspect by 20-40 times (e.g., 20 times, 25 times, 30 times, 35 times, 40 times or any value between them). The diluted compound deodorizer can be used by spraying and / or in conjunction with daily cleaning products.

[0060] Compared with the prior art, the present invention has the following beneficial effects: The deodorizing composition of the present invention has a significant efficiency in removing irritating gases and a high antibacterial rate. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way.

[0062] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0063] Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art. Unless otherwise specified, the reagents used in the following embodiments are conventional biochemical reagents; the raw materials, instruments, and equipment used in the following embodiments can all be obtained commercially or by existing methods; unless otherwise specified, the reagent dosages are those used in routine experimental operations; unless otherwise specified, the experimental methods are conventional methods.

[0064] The preparation method of zinc oxide nanoparticles in this invention can be found in Xiangyang Bai, Linlin Li, Huiyu Liu, Longfei Tan, Tianlong Liu, Xianwei Meng, Solvothermal Synthesis of ZnONanoparticles and Anti-Infection Application in Vivo, ACS Applied Materials & Interfaces, 2014, (7): 1308-1317.

[0065] Specific preparation methods include: 0.015 M zinc salt (zinc acetate dihydrate) and 0.1 g dimethyl sulfone were dissolved in 80 mL of methanol at 60 °C with continuous stirring at 60 °C. Then, 40 mL of 0.001 M KOH was added at a rate of 1 mL per minute, maintaining the reaction temperature at 60 °C. After 12 hours of reaction, 10 nm ZnO nanoparticles were obtained. The precipitate was washed three times with ethanol to remove soluble impurities, then dried at 65 °C for 12 hours and stored at room temperature (10–30 °C) for later use.

[0066] Eucalyptus leaf extract was obtained by conventional water extraction. For specific preparation methods, please refer to "Effects of alcohol extraction and water precipitation versus water extraction and alcohol precipitation on the antioxidant activity of eucalyptus leaf polyphenol extract, Eucalyptus Technology, 2016, 33(2): 33-35". Specifically, the preparation methods of eucalyptus leaf extract in the embodiments and comparative examples of this invention include: water extraction and alcohol precipitation: 5 g of eucalyptus leaf powder was extracted with water as the extraction solvent at a material-to-liquid ratio of 1:20 at room temperature (10~30℃) for 1 h, then concentrated to near dryness, precipitated with 90% ethanol, cooled, and centrifuged at high speed to obtain the supernatant (i.e., the eucalyptus leaf extract of this application) and the precipitate.

[0067] Example 1 Preparation of compound deodorizing agent: (1) Weigh 10g of zinc oxide nanoparticles, dissolve them in 10L of pure water, and stir to mix; (2) Stir at 1000 rpm and heat the solution to 40°C, keep it at the temperature for 1 hour to obtain zinc oxide solution; (3) Weigh 100g of eucalyptus leaf extract and add it to the zinc oxide solution above. Use ultrasound to dissolve it completely. Add 100mL of activator (plant ester PT-11) and stir until clear to obtain a mixed solution. (4) Centrifuge the above mixed solution at 3000 r / min for 10 minutes to separate the supernatant. Discard the precipitate and dispense it into individual containers. (5) When using, dilute the deodorizing agent solution 30 times and spray it.

[0068] Example 2 The only difference from Example 1 is that in step (1), the amount of zinc oxide nanoparticles used is 5g.

[0069] Example 3 The only difference from Example 1 is that in step (1), the amount of zinc oxide nanoparticles used is 20g.

[0070] Example 4 The only difference from Example 1 is that in step (3), the amount of eucalyptus leaf extract used is 80g.

[0071] Example 5 The only difference from Example 1 is that in step (3), the amount of eucalyptus leaf extract used is 120g.

[0072] Example 6 The only difference from Example 1 is that no activator is added in step (3).

[0073] Example 7 The only difference from Example 1 is that in step (3), the eucalyptus leaf extract is obtained by alcohol extraction and water precipitation.

[0074] Comparative Example 1 The difference between this comparative example and Example 1 is that this comparative example does not contain eucalyptus leaf extract. The specific steps are as follows: (1) Weigh 10g of zinc oxide nanoparticles, dissolve them in 10L of pure water, and stir to mix; (2) Stir at 1000 rpm and heat the solution to 40°C, keep it at the temperature for 1 hour to obtain zinc oxide solution; (3) Add 100 mL of activator and stir until clear to obtain a mixed solution; (4) Centrifuge the above mixed solution at 3000 r / min for 10 minutes to separate the supernatant. Discard the precipitate and dispense it into individual containers. (5) When using, dilute the deodorizing agent solution 30 times and spray it.

[0075] Comparative Example 2 The difference from Example 1 is that this comparative example does not contain zinc oxide nanoparticles. The specific steps are as follows: (1) Weigh 100g of eucalyptus leaf extract, add it to pure water, use sonication to fully dissolve it, add 100mL of activator, stir until clear, and obtain a mixed solution; (2) Centrifuge the above mixed solution at 3000 r / min for 10 minutes to separate the supernatant. Discard the precipitate and dispense it into individual containers. (3) When using, dilute the deodorizing agent solution 30 times and spray it.

[0076] Comparative Example 3 The only difference from Example 1 is that in step (3), the eucalyptus leaf extract is replaced with Scutellaria baicalensis extract. The preparation method of Scutellaria baicalensis extract is the same as that of eucalyptus leaf extract.

[0077] The composite deodorizers obtained in the above embodiments and comparative examples were tested for their effectiveness in removing irritating gases and inhibiting common bacteria. The specific results are shown in Tables 1 and 2.

[0078] The test method for the removal rate of ammonia, hydrogen sulfide and dimethyl sulfide by the composite deodorizer of the present invention is in accordance with the standard method of CJ / T 516-2017.

[0079] The antibacterial rate of the compound deodorizer of the present invention against Escherichia coli and Staphylococcus aureus was determined by a quantitative suspension antibacterial test.

[0080] Table 1

[0081] Table 2

[0082] The composite deodorizer obtained by this invention has a removal effect of more than 75% on ammonia, hydrogen sulfide and methyl sulfide, and an antibacterial rate of more than 95% on common bacteria such as Escherichia coli and Staphylococcus aureus.

[0083] Furthermore, compared to Comparative Example 1 which did not contain eucalyptus extract, the composite deodorizer of this application exhibits higher removal efficiency for irritating gases (ammonia, hydrogen sulfide, and dimethyl sulfide). Compared to Comparative Example 2 which does not contain zinc oxide nanoparticles, the composite deodorizer of this application not only shows significant removal efficiency for irritating gases (ammonia, hydrogen sulfide, and dimethyl sulfide) but also has a high antibacterial rate. Compared to Comparative Example 3 which uses a combination of Scutellaria baicalensis extract and zinc oxide nanoparticles, this application shows significant removal efficiency for irritating gases (ammonia, hydrogen sulfide, and dimethyl sulfide), and the composite deodorizer of Comparative Example 3 is prone to precipitation, further affecting its service life and deodorizing effect.

[0084] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An odor-removing composition comprising zinc oxide nanoparticles and eucalyptus leaf extract.

2. The deodorizing composition according to claim 1, characterized in that, The mass ratio of the zinc oxide nanoparticles to the eucalyptus leaf extract is 1:(1-20), preferably 1:(3-12), and more preferably 1:(5-10); And / or, the zinc oxide nanoparticles have a particle size of 1-20 nm; Preferably, the eucalyptus leaf extract is an aqueous extract; Preferably, the method for preparing the eucalyptus leaf extract includes: using water as the extraction solvent, with a material-to-liquid ratio of eucalyptus leaf powder to water of 1:(10-20), extracting at 10-30℃ for 1-5 h, concentrating to near dryness, adding ethanol to precipitate, cooling, centrifuging to obtain supernatant and precipitate, wherein the supernatant is the eucalyptus leaf extract. Preferably, the ethanol has a mass concentration of 80-95%; And / or, the method for preparing the zinc oxide nanoparticles includes: Zinc salt, dimethyl sulfone, solvent and KOH are mixed and reacted to obtain the zinc oxide nanoparticles; Preferably, the zinc salt is selected from zinc nitrate and zinc acetate; Preferably, the concentration of the zinc salt is 0.005-0.05M; And / or, the solvent is selected from methanol; And / or, the temperature of the reaction is 50-80°C; And / or, the reaction time is 3-12 hours.

3. A composite deodorizing agent, comprising the deodorizing composition according to any one of claims 1-2; Preferably, the composite deodorizer further includes an activator; Preferably, the activator is selected from polymeric plant esters, and more preferably plant ester PT-11; Preferably, the mass ratio of the activator to the eucalyptus leaf extract is 1:(0.5-2).

4. A method for preparing a composite deodorizing agent, comprising the following steps: (1) Zinc oxide nanoparticles were mixed with pure water to obtain a zinc oxide solution; (2) The eucalyptus leaf extract, an optional activator, and the zinc oxide solution are mixed to obtain a mixed solution; (3) The mixed solution is subjected to solid-liquid separation to obtain the precipitate and the composite deodorizer.

5. The preparation method according to claim 4, characterized in that, In step (1), the particle size of the zinc oxide nanoparticles is 1-20 nm; And / or, the mass of the zinc oxide nanoparticles is 0.01-0.5% of the zinc oxide solution, preferably 0.01-0.2%, more preferably 0.05-0.15%; And / or, the concentration of the zinc oxide nanoparticles is 0.5-5 mg / mL; Preferably, in step (1), the mixing temperature is 20-50°C; Preferably, in step (1), the mixing time is 0.5-2 hours; Preferably, the method for preparing the zinc oxide nanoparticles includes: Zinc salt, dimethyl sulfone, solvent and KOH are mixed and reacted to obtain the zinc oxide nanoparticles; Preferably, the zinc salt is selected from zinc nitrate and zinc acetate; Preferably, the concentration of the zinc salt is 0.005-0.05M; And / or, the solvent is selected from methanol; And / or, the temperature of the reaction is 50-80°C; And / or, the reaction time is 3-12 hours.

6. The preparation method according to claim 4, characterized in that, The eucalyptus leaf extract is an aqueous extract; Preferably, the method for preparing the eucalyptus leaf extract includes: using water as the extraction solvent, with a material-to-liquid ratio of eucalyptus leaf powder to water of 1:(10-20), extracting at 10-30℃ for 1-5 h, concentrating to near dryness, adding ethanol to precipitate, cooling, centrifuging to obtain supernatant and precipitate, wherein the supernatant is the eucalyptus leaf extract. Preferably, the ethanol has a mass concentration of 80-95%; Preferably, the mass ratio of the zinc oxide nanoparticles to the eucalyptus leaf extract is 1:(5-20); Preferably, the activator is selected from polymeric plant esters, and more preferably plant ester PT-11; Preferably, the mass ratio of the activator to the eucalyptus leaf extract is 1:(0.5-2).

7. The preparation method according to claim 4, characterized in that, The solid-liquid separation method is centrifugation; Preferably, the centrifugation speed is 2000-4000 r / min; Preferably, the solid-liquid separation time is 5-20 minutes.

8. The application of the deodorizing composition according to any one of claims 1-2, the composite deodorizing agent according to claim 3, or the composite deodorizing agent prepared by the preparation method according to any one of claims 4-7 in removing irritating gases; Preferably, the irritating gas is selected from one or more of ammonia, hydrogen sulfide, or dimethyl sulfide.

9. The application of the deodorizing composition according to any one of claims 1-2, the composite deodorizing agent according to claim 3, or the composite deodorizing agent prepared by the preparation method according to any one of claims 4-7 in the field of bacterial inhibition; Preferably, the bacteria are Escherichia coli and / or Staphylococcus aureus.

10. A method of using a compound deodorizer, comprising: Dilute the composite deodorizer according to claim 3 or the composite deodorizer prepared by any one of claims 4-7 by 20-40 times; The diluted compound deodorizer can be used by spraying and / or in conjunction with daily cleaning products.

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