Long-acting high-activity antioxidant and method for preparing the same

Abstract

The application discloses a long-acting high-activity antioxidant and a preparation method thereof. The antioxidant is prepared by modifying anthocyanins through auxiliary coloration, and the modified anthocyanins include amino acid modified anthocyanins, organic acid modified anthocyanins, succinic anhydride modified anthocyanins or metal ion modified anthocyanins. The prepared antioxidant is added into distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 1-7 wt%. The long-acting high-activity antioxidant prepared by the preparation method has strong antioxidant activity and good high-temperature stability, and can effectively inhibit coal spontaneous combustion.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal spontaneous combustion inhibitor, and relates to a long-acting high-activity antioxidant type inhibitor and a preparation method thereof. BACKGROUND

[0002] Coal resources have long been the main energy source and important industrial raw material in China. Coal spontaneous combustion is one of the main safety hazards in coal mining, which seriously threatens the safety production of coal mines and the health of underground workers. Effectively inhibiting coal spontaneous combustion disasters plays a crucial role in ensuring the safe and efficient mining of coal mines and the stable development of industrial economy.

[0003] Coal spontaneous combustion inhibitor is a common measure to prevent coal spontaneous combustion disasters. Existing inhibitors can be divided into physical action type inhibitors and chemical action type inhibitors according to the mechanism of preventing coal spontaneous combustion. Physical inhibitors generally require a large dosage, and the inhibiting effect is weakened or even lost with the evaporation of water. Chemical inhibitors have problems such as environmental pollution and high cost in actual application. As a renewable green resource and antioxidant functional natural product, anthocyanin, as an antioxidant, is applied to the field of coal spontaneous combustion prevention and control technology, can react with active functional groups in the coal structure, terminate the coal-oxygen chain reaction, and achieve the purpose of green and environmentally friendly inhibition of coal spontaneous combustion. However, the coal spontaneous combustion inhibitor prepared by using the existing conventional anthocyanin has poor thermal stability, is easily affected by environmental factors such as temperature, reduces the original antioxidant property, has poor inhibitory effect on coal spontaneous combustion, and is difficult to apply in actual production. SUMMARY

[0004] An object of the present application is to provide a long-acting high-activity antioxidant type inhibitor, which solves the problem of poor thermal stability of existing antioxidant type inhibitors, short inhibitory life on coal spontaneous combustion, and difficulty in application in actual production.

[0005] Another object of the present application is to provide a preparation method of a long-acting high-activity antioxidant type inhibitor.

[0006] The first technical solution adopted by the present application is a preparation method of a long-acting high-activity antioxidant type inhibitor, comprising the following steps:

[0007] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanin through auxiliary coloration, including amino acid modified anthocyanin, organic acid modified anthocyanin, succinic anhydride modified anthocyanin or metal ion modified anthocyanin;

[0008] Step 2, adding the antioxidant prepared in step 1 into distilled water, stirring to completely dissolve the antioxidant, to obtain a long-acting high-activity antioxidant type inhibitor, wherein the concentration of the antioxidant is 1-7wt%.

[0009] Amino acid-modified anthocyanins involve mixing anthocyanins and L-proline in a round-bottom flask at a molar ratio of 1:750, dissolving them in deionized water, adjusting the pH of the mixture to 2-3 with hydrochloric acid solution, then placing the round-bottom flask in a water bath and continuously stirring and heating it to react. After the reaction is complete, the mixture is cooled to room temperature and finally dried to obtain an antioxidant.

[0010] The round-bottom flask was placed in a water bath and heated continuously with stirring. The heating temperature was 85–95°C, and the reaction time was 6–8 hours.

[0011] Organic acid-modified anthocyanins involve dissolving malic acid, pyridine, and anthocyanins in a 50% ethanol solution. The concentration of malic acid is 8.7–8.8 g / L, the concentration of anthocyanins is 2–3 g / L, and the volume ratio of pyridine to ethanol solution is 1:3. The reaction is carried out by stirring in a 50°C water bath for 5–7 hours. Then, pyridine and ethanol are removed by rotary evaporator under negative pressure, and finally, the antioxidant is obtained by vacuum drying.

[0012] The process of modifying anthocyanins with succinic anhydride involves dissolving anthocyanin powder in a 30% methanol solution to form a mixed solution with an anthocyanin concentration of 16–17 g / L. Hydrochloric acid solution is then added to adjust the pH to 6–7. Succinic anhydride is then added to the mixed solution, with a mass ratio of anthocyanin powder to succinic anhydride of 1:0.75. The mixture is stirred and reacted in a 60°C water bath for 4–5 hours, cooled to room temperature, filtered, and the filtered solid is dried to obtain the antioxidant.

[0013] Metal ion modified anthocyanins, including those using Mg 2+ or Ca 2+ Modified anthocyanins.

[0014] Mg 2+ Modified anthocyanins are prepared by dissolving MgCl2 and anthocyanin powder in deionized water at a mass ratio of 1:3, stirring the reaction for 1-2 hours to obtain a chelation reaction product, and drying to remove water to obtain an antioxidant.

[0015] Using Ca 2+ Modified anthocyanins are prepared by dissolving CaCl2 and anthocyanin powder in deionized water at a mass ratio of 1:3, stirring the reaction for 1-2 hours to obtain a chelation reaction product, and drying to remove water to obtain an antioxidant.

[0016] The second technical solution adopted in this invention is that the long-acting, highly active antioxidant inhibitor prepared by the above preparation method is composed of an antioxidant and distilled water, with an antioxidant concentration of 1-7 wt%, and the antioxidant is formed by modifying anthocyanins through a co-coloring process.

[0017] The application has the beneficial effect that the antioxidant is prepared by modifying anthocyanins through auxiliary color effect, the antioxidant activity of anthocyanins is significantly enhanced, the long-acting high-activity antioxidant inhibitor is prepared, and the coal spontaneous combustion can be effectively inhibited, and the high-temperature stability is good. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the oxygen consumption rate curve of the long-acting high-activity antioxidant inhibitor prepared in the comparative example 1 and the examples 1-5 in the application;

[0019] Figure 2 is the inhibition rate comparison chart of the long-acting high-activity antioxidant inhibitor prepared in the comparative example 1 and the examples 1-5 in the application. DETAILED DESCRIPTION

[0020] The application will be described in detail below in combination with the drawings and specific embodiments.

[0021] Example 1

[0022] A preparation method of a long-acting high-activity antioxidant inhibitor, comprising the following steps:

[0023] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanins through auxiliary color effect, including amino acid modified anthocyanins, mixing anthocyanins and L-proline in a round-bottom flask according to a molar ratio of 1:750, then adding deionized water to dissolve, and adjusting the pH of the mixed solution to 2 with hydrochloric acid solution, then placing the round-bottom flask in a water bath pot for continuous stirring and heating reaction, the heating temperature is 90℃, the reaction time is 6h, after the reaction is completed, cooling to room temperature, and finally drying to obtain the antioxidant.

[0024] Step 2, adding the antioxidant prepared in step 1 into distilled water, stirring to completely dissolve the antioxidant, and obtaining a long-acting high-activity antioxidant inhibitor, wherein the concentration of the antioxidant is 5wt%.

[0025] Example 2

[0026] A preparation method of a long-acting high-activity antioxidant inhibitor, comprising the following steps:

[0027] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanins through auxiliary color effect, including organic acid modified anthocyanins, dissolving malic acid, pyridine and anthocyanins in a 50% ethanol solution, the concentration of malic acid is 8.7g / L, the concentration of anthocyanins is 2g / L, and the volume ratio of pyridine to ethanol solution is 1:3, stirring and reacting in a 50℃ water bath environment for 5h, then removing pyridine and ethanol under negative pressure condition by using a rotary evaporator, and finally vacuum drying to prepare the antioxidant.

[0028] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 5wt%.

[0029] Example 3

[0030] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0031] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanins through auxiliary coloration, including modifying anthocyanins with succinic anhydride, dissolving anthocyanin powder in a 30% methanol solution to form a mixed solution, the concentration of anthocyanins in the mixed solution is 16g / L, then adding a hydrochloric acid solution to adjust the pH value to 6, and then adding succinic anhydride to the mixed solution, the mass ratio of anthocyanin powder to succinic anhydride is 1:0.75, stirring and reacting in a 60℃ water bath environment for 4h, cooling to room temperature, and finally filtering and drying the solid obtained by filtering to obtain the antioxidant.

[0032] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 5wt%.

[0033] Example 4

[0034] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0035] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanins through auxiliary coloration, including modifying anthocyanins with Mg 2+ Cl2 and anthocyanin powder with a mass ratio of 1:3 are dissolved in deionized water, stirring and reacting for 1h to obtain a chelation reaction product, and drying to remove water to obtain the antioxidant.

[0036] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 5wt%.

[0037] Example 5

[0038] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0039] Step 1, preparing an antioxidant, the antioxidant is formed by modifying anthocyanins through auxiliary coloration, including modifying anthocyanins with Ca 2+ Cl2 and anthocyanin powder with a mass ratio of 1:3 are dissolved in deionized water, stirring and reacting for 1h to obtain a chelation reaction product, and drying to remove water to obtain the antioxidant.

[0040] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 5wt%.

[0041] Example 6

[0042] A method for preparing a long-acting high-activity antioxidant, comprising the following steps:

[0043] Step 1, preparing an antioxidant, the antioxidant is modified by auxiliary coloration of anthocyanins, including amino acid modified anthocyanins, mixing anthocyanins with L-proline in a molar ratio of 1:750 in a round-bottom flask, then adding deionized water to dissolve, and adjusting the pH of the mixed solution to 3 with hydrochloric acid solution, then placing the round-bottom flask in a water bath and continuously stirring and heating to react, the heating temperature is 92℃, the reaction time is 7h, after the reaction is completed, cooling to room temperature, and finally drying to obtain the antioxidant.

[0044] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 1wt%.

[0045] Example 7

[0046] A method for preparing a long-acting high-activity antioxidant, comprising the following steps:

[0047] Step 1, preparing an antioxidant, the antioxidant is modified by auxiliary coloration of anthocyanins, including organic acid modified anthocyanins, dissolving malic acid, pyridine and anthocyanins in a 50% ethanol solution, the concentration of malic acid is 8.8g / L, the concentration of anthocyanins is 3g / L, and the volume ratio of pyridine to ethanol solution is 1:3, stirring at 50℃ water bath environment for 6h, then removing pyridine and ethanol under negative pressure by rotary evaporator, and finally vacuum drying to obtain the antioxidant.

[0048] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 1wt%.

[0049] Example 8

[0050] A method for preparing a long-acting high-activity antioxidant, comprising the following steps:

[0051] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including succinic anhydride modified anthocyanins, anthocyanins powder is dissolved in 30% methanol solution to form a mixed solution, the concentration of anthocyanins in the mixed solution is 17g / L, then hydrochloric acid solution is added to adjust the pH value to 7, then succinic anhydride is added to the mixed solution, the mass ratio of anthocyanins powder to succinic anhydride is 1:0.75, stirring reaction is carried out in 60℃ water bath environment for 5h, cooling to room temperature, and finally filtering and drying the filtered solid to obtain the antioxidant.

[0052] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 1wt%.

[0053] Example 9

[0054] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0055] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including Mg 2+ Modified anthocyanins, MgCl2 and anthocyanins powder with a mass ratio of 1:3 are dissolved in deionized water, stirring reaction is carried out for 2h to obtain a chelation reaction product, and the antioxidant is obtained by drying and removing water.

[0056] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 1wt%.

[0057] Example 10

[0058] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0059] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including Ca 2+ Modified anthocyanins, CaCl2 and anthocyanins powder with a mass ratio of 1:3 are dissolved in deionized water, stirring reaction is carried out for 1h to obtain a chelation reaction product, and the antioxidant is obtained by drying and removing water.

[0060] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, so that a long-acting high-activity antioxidant is obtained, wherein the concentration of the antioxidant is 1wt%.

[0061] Example 11

[0062] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0063] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including amino acid modified anthocyanins, mixing anthocyanins with L-proline according to the molar ratio of 1:750 in a round-bottom flask, then adding deionized water to dissolve, and adjusting the pH of the mixed solution to 3 with hydrochloric acid solution, then placing the round-bottom flask in a water bath and continuously stirring and heating to react, the heating temperature is 85℃, the reaction time is 8h, after the reaction is completed, cooling to room temperature, and finally drying to obtain the antioxidant.

[0064] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 7wt%.

[0065] Example 12

[0066] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0067] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including organic acid modified anthocyanins, dissolving malic acid, pyridine and anthocyanins in 50% ethanol solution, the concentration of malic acid is 8.8g / L, the concentration of anthocyanins is 3g / L, the volume ratio of pyridine to ethanol solution is 1:3, stirring at 50℃ water bath environment for 7h, then removing pyridine and ethanol under negative pressure condition by rotary evaporator, and finally vacuum drying to obtain the antioxidant.

[0068] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 7wt%.

[0069] Example 13

[0070] A preparation method of a long-acting high-activity antioxidant, comprising the following steps:

[0071] Step 1, preparation of antioxidant, antioxidant is modified by anthocyanins through auxiliary color, including succinic anhydride modified anthocyanins, dissolving anthocyanins powder in 30% methanol solution to form a mixed solution, the concentration of anthocyanins in the mixed solution is 17g / L, then adding hydrochloric acid solution to adjust the pH value to 7, then adding succinic anhydride into the mixed solution, the mass ratio of anthocyanins powder to succinic anhydride is 1:0.75, stirring at 60℃ water bath environment for 5h, cooling to room temperature, and finally filtering and drying the filtered solid to obtain the antioxidant.

[0072] Step 2, the antioxidant prepared in step 1 is added to distilled water, and the antioxidant is completely dissolved by stirring, thereby obtaining a long-acting high-activity antioxidant, wherein the concentration of the antioxidant is 7wt%.

[0073] Example 14

[0074] A method for preparing a long-acting, highly active antioxidant inhibitor includes the following steps:

[0075] Step 1: Preparation of antioxidants. These antioxidants are formed by modifying anthocyanins through a co-coloring process, including the use of Mg... 2+ Modified anthocyanins were obtained by dissolving MgCl2 and anthocyanin powder in deionized water at a mass ratio of 1:3, stirring for 2 hours to obtain the chelation reaction product, and drying to remove water to obtain the antioxidant.

[0076] Step 2: Add the antioxidant prepared in Step 1 to distilled water and stir until the antioxidant is completely dissolved to obtain a long-lasting, highly active antioxidant inhibitor with an antioxidant concentration of 7 wt%.

[0077] Example 15

[0078] A method for preparing a long-acting, highly active antioxidant inhibitor includes the following steps:

[0079] Step 1: Preparation of antioxidants. These antioxidants are formed by modifying anthocyanins through a co-coloring process, including the use of Ca... 2+ Modified anthocyanins were obtained by dissolving CaCl2 and anthocyanin powder in deionized water at a mass ratio of 1:3, stirring for 1 hour to obtain the chelation reaction product, and drying to remove water to obtain the antioxidant.

[0080] Step 2: Add the antioxidant prepared in Step 1 to distilled water and stir until the antioxidant is completely dissolved to obtain a long-lasting, highly active antioxidant inhibitor with an antioxidant concentration of 7 wt%.

[0081] Comparative Example 1

[0082] A method for preparing an anthocyanin-based coal spontaneous combustion inhibitor includes adding anthocyanins to distilled water and stirring until completely dissolved to obtain the coal spontaneous combustion inhibitor, wherein the antioxidant concentration is 5 wt%.

[0083] The antioxidant activity of anthocyanins and the antioxidants prepared in Examples 1-5 was tested. The free radical scavenging performance of anthocyanins and the antioxidants prepared in Examples 1-5 was compared and analyzed by DPPH spectrophotometry. DPPH free radicals were prepared into a 200 μmol / L ethanol solution. The anthocyanins to be tested and the antioxidants prepared in Examples 1-5 were prepared into solutions of different concentrations for testing. 2 mL of DPPH ethanol solution and 2 mL of the test solution were added to test tubes respectively, mixed well, and allowed to stand in the dark for 30 min before the residual amount was tested.

[0084] The formula for calculating the ability of a substance to eliminate DPPH free radicals is as follows:

[0085] (1)

[0086] S A DPPH scavenging rate, %; A i A0 is the absorbance of DPPH solution at 517 nm.

[0087] The radical scavenging rates of anthocyanins and the antioxidants prepared in Examples 1-5 were calculated and shown in Table 1.

[0088] Table 1 Radical scavenging rates of anthocyanins and antioxidants prepared in Examples 1-5

[0089]

[0090] As can be seen from Table 1, anthocyanins and the antioxidants prepared in Examples 1-5 all have the ability to eliminate DPPH radicals, and the elimination rates are all significantly enhanced with the increase of the concentration. The antioxidants prepared in Examples 1-5 have stronger ability to eliminate DPPH radicals than ordinary anthocyanins, indicating that the modified anthocyanins by co-pigmentation can improve the antioxidant activity, and the antioxidant activity of the anthocyanins modified by L-proline is the best.

[0091] In order to test the effect of the antioxidant inhibitor of the application on inhibiting coal spontaneous combustion, non-caking coal and long flame coal samples were collected from different coal seam mining areas in northern Shaanxi Jurassic, sealed and packaged with airtight plastic bags, the epidermis was peeled off, the samples were broken and sieved to obtain samples with a particle size of 200 mesh, and then placed in a vacuum drying oven at room temperature for 24 hours to remove the external moisture in the coal. A part of the antioxidant inhibitor prepared in Comparative Example 1 and Examples 1-5 was added for treatment as a coal sample, and another part without treatment was used as a raw coal sample.

[0092] According to the gas concentration and flow rate at the inlet and outlet of the coal sample reactor, the oxygen consumption rate of the coal at different temperatures was calculated, and the specific calculation formula is shown as formula (2):

[0093] (2)

[0094] In the formula, is the oxygen consumption rate, unit: mol·g -1 ·min -1 ; V in is the inlet flow rate of the reactor, unit: mL·min -1 ; C in is the oxygen concentration at the inlet of the reactor; V out is the outlet flow rate of the reactor, unit: mL·min -1 ; C outFor the oxygen concentration of the reactor outlet; m out For the reactor coal loading mass, unit g.

[0095] Through the reactor inlet and outlet gas flow monitoring, it is found that the inlet and outlet gas flow is similar, so the formula (2) is improved as shown in formula (3):

[0096] (3)

[0097] In the formula, For the reactor inlet and outlet gas flow, unit mL·min-1; For the oxygen concentration difference of the reactor inlet and outlet, %.

[0098] The calculation results are shown in Figure 1 .

[0099] Oxygen is the key factor of coal oxidation. When the active functional groups in coal react with oxygen in the air, the consumption of oxygen and the release of gaseous products can reflect the degree of coal spontaneous combustion. In the process of coal oxidation, oxygen in the air is consumed to produce CO, CO2 and other gases, and the oxygen consumption rate can reflect the intensity of the coal oxidation process. From Figure 1 It can be seen that the inhibitors prepared in Comparative Example 1 and Examples 1-5 all significantly reduce the oxygen consumption rate in the process of coal spontaneous combustion, inhibit the coal oxidation process, and the anti-oxygen inhibitors prepared in Examples 1-5 have better inhibition effect on coal oxidation than the inhibitor in Comparative Example 1.

[0100] To measure the inhibition effect of the inhibitor on coal spontaneous combustion, the inhibition rate is an intuitive indicator. According to the industry standard, the inhibition rate of the inhibitor refers to the difference between the CO gas volume generated by the test raw coal sample and the inhibited coal sample and the CO gas volume generated by the raw coal sample under specific laboratory conditions. The inhibition rate reflects the change of the index gas before and after the coal is inhibited. The higher the inhibition rate, the stronger the inhibition effect of the inhibitor, and vice versa. The specific formula is as follows:

[0101]

[0102] In the formula, I is the inhibition rate, V 阻 is the CO volume generated by the inhibited coal sample; V 原 is the CO volume generated by the raw coal sample.

[0103] The average inhibition rate of the anti-oxygen inhibitor prepared in Comparative Example 1 and Examples 1-5 from 30℃ to 300℃ in the oxidation process is shown in Figure 2 .

[0104] From Figure 2It can be known that the antioxidant resistance rate of the antioxidant resistance agent prepared by the anthocyanins modified by different auxiliary color methods is obviously improved compared with the anthocyanins, and the method prepared by the antioxidant resistance agent can effectively inhibit the coal spontaneous combustion, and the antioxidant resistance agent has good stability at high temperature.

Claims

1. Use of a long-acting, highly active antioxidant retarder for inhibiting spontaneous combustion of coal, characterized in that, The preparation method of the long-acting high-activity antioxidant inhibitor comprises the following steps: Step 1, preparing the antioxidant, which is formed by modifying anthocyanins through auxiliary coloring, including succinic anhydride modified anthocyanins; The succinic anhydride modified anthocyanins comprise the following steps: dissolving anthocyanin powder in a 30% methanol solution to form a mixed solution, the concentration of anthocyanins in the mixed solution is 16-17 g / L, then adding a hydrochloric acid solution to adjust the pH value to 6-7, then adding succinic anhydride into the mixed solution, the mass ratio of anthocyanin powder to succinic anhydride is 1:0.75, stirring and reacting in a 60°C water bath environment for 4-5 hours, cooling to room temperature, and finally filtering and drying the filtered solid to obtain the antioxidant; Step 2, adding the antioxidant prepared in step 1 into distilled water and stirring to completely dissolve the antioxidant, thereby obtaining the long-acting high-activity antioxidant inhibitor, wherein the concentration of the antioxidant is 1-7 wt%.

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