Composite antioxidant and preparation method thereof

Abstract

The invention discloses a composite antioxidant and a preparation method, and relates to the technical field of antioxidants, the composite antioxidant comprises the following raw material components by weight: an antioxidant, a synergist, a polyphenol compound, a flavonoid compound and the balance of a carrier; the preparation method comprises the following steps: step 1, grinding raw materials of an antioxidant; step 2, purifying the raw materials of the antioxidant to obtain extract liquor; step 3, centrifuging the extract liquor; step 4, standing the purified liquor; according to the composite antioxidant, the synergist and the carrier are added, through the synergistic effect, the composite antioxidant is higher in oxidation resistance, the synergistic effect and the solubilizing effect are achieved when the composite antioxidant is mixed with the antioxidant for use, meanwhile, residues generated in feed production are reasonably utilized, and the preparation cost of the raw materials of the antioxidant is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of antioxidants, in particular to a composite antioxidant and a preparation method thereof. Background Art

[0002] With the continuous progress of the food industry, food antioxidants have also made great progress. Antioxidants are a class of substances that can effectively prevent or delay the auto-oxidation of lipid compounds. They can combine with peroxides to prevent the oxidation process from continuing. In addition, they can also be easily oxidized by themselves. First, they combine with oxygen in the air to oxidize themselves to protect the easily oxidized components in the material. At present, the main antioxidants are mainly divided into two categories. One is a single antioxidant; the other is a composite antioxidant, which is composed of different antioxidants and synergists or chelating agents through reasonable compatibility. Selecting appropriate components for scientific compatibility is the key technology of composite antioxidants. Most oxidants are synthetic oxidants. However, synthetic antioxidants are easy to decompose, have low efficacy and are irritating. The scope of application in the processing, production, storage and transportation of food, drugs and cosmetics is getting smaller and smaller. Synthetic antioxidants make people feel uneasy. Therefore, people have turned their research focus to natural antioxidants, and now need a composite antioxidant with strong oxidation.

[0003] After searching, patent number CN103892047A discloses an antioxidant;

[0004] The above patent has the following deficiencies: In the prior art, traditional composite antioxidants all use ethoxyquinoline in combination with BHT, TBHQ, BHA, PG, etc.; however, since the color of ethoxyquinoline itself changes too quickly and too much, it is easy to make the color of food or premix darken sharply when used in large quantities, which is mistaken for changes in the quality of food or feed. In addition, the antioxidant effect of ethoxyquinoline on certain oils is not ideal; therefore, the problem of color change and attenuation of antioxidant effect of antioxidants needs to be solved. The prior art adds the traditional single-ingredient antioxidant to feed or materials, but the antioxidant effect is poor, the antioxidant time is short, the effect is not very ideal, and the safety is not high.

[0005] In view of the above problems, a composite antioxidant and a preparation method are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a composite antioxidant and a preparation method, and the device is used to work, thereby solving the problem that the traditional composite antioxidants in the above background all use ethoxyquinoline and BHT, TBHQ, BHA, PG and the like for compounding; because the color of ethoxyquinoline itself changes too quickly and too much, it is easy to make the color of food or premix darken sharply when used in large quantities, which is mistaken for changes in the quality of food or feed. In addition, the antioxidant effect of ethoxyquinoline on certain oils is not ideal; therefore, the problem of color change of antioxidants and attenuation of antioxidant effects needs to be solved. The existing technology adds the traditional food composite antioxidant to feed or materials, and the antioxidant effect is poor, the antioxidant time is short, the effect is not very ideal, and the safety is not high.

[0007] To achieve the above object, the present invention provides the following technical solution: a composite antioxidant, characterized in that it comprises the following raw material components in weight percentage: 28-38% antioxidant, 10-18% synergist, including citrate, vitamin C, vitamin E, carotenoids, polyphenol compounds and flavonoid compounds, and the balance is a carrier;

[0008] The above-mentioned vitamin E, vitamin C, polyphenols and carotenoids are used, and have good antioxidant properties, and are widely used in the food and cosmetics industries.

[0009] Preferably, the antioxidant comprises the following raw material components by weight percentage: 2-66% ethoxyquinoline, 2-50% butylated hydroxytoluene, 0.5-30% tert-butylhydroquinone, 2-15% activated carbon, 1-10% calcium chloride, 10-80% calcium carbonate, wherein the butylated hydroxytoluene, tert-butylhydroquinone, activated carbon and calcium carbonate are all ground to pass a 60-mesh sieve, 30-40 parts of rosemary essential oil, 4-10 parts of peanut shell polyphenol extract, 2-5 parts of walnut leaf polyphenol extract, 10-20 parts of orange peel extract, and 5-10 parts of apple polyphenol extract;

[0010] The above antioxidants are used as the core components of the composite antioxidant, which are responsible for the main antioxidant function. These antioxidants prevent the chain reaction of free radicals by providing hydrogen atoms; these components are mixed and purified, and then combined with a carrier to form a composite antioxidant with high antioxidant effect.

[0011] Preferably, the synergist includes 1-5 parts of citrate, 1-5 parts of vitamin C, 3-5 parts of vitamin E, and 10-15 parts of carotenoids; the polyphenolic compounds include chlorogenic acid and ellagic acid, with 1-5 parts of chlorogenic acid and ellagic acid respectively;

[0012] The above-mentioned enhancers are used to improve the antioxidant effect of the composite antioxidant. These ingredients are added during the preparation process to enhance the efficacy of the antioxidant. Polyphenol compounds, including chlorogenic acid, ellagic acid, etc., have the function of scavenging free radicals and inhibiting enzymatic oxidation. These raw material components can be selected and combined according to specific application scenarios and needs to achieve the best antioxidant effect.

[0013] The carrier includes silicon dioxide, zeolite powder and a metal ion passivator. The silicon dioxide and zeolite powder are mixed at a mass ratio of 0.7:1, and then the metal ion passivator is added to inhibit the catalytic effect.

[0014] The above-mentioned carrier is a substance used to adsorb antioxidants and synergists, which helps to evenly disperse these active ingredients in the final product. The carrier can be a suitable solid or liquid, which is selected according to the specific preparation method and application scenario.

[0015] Preferably, the metal ion passivator includes copper ions or iron ions. EDTA and its derivatives are often used as chelating agents for metal ions. After mixing, a carrier is obtained, and the particle size of the carrier is 40-80 meshes.

[0016] The above metal ion passivator is used to inhibit the catalytic effect of metal ions (such as copper, iron, etc.) to prevent them from inducing polymer degradation reactions.

[0017] Preferably, the flavonoid compound comprises 1-5 parts of 3,4,5,7-tetrahydroxyflavone in peanut shell extract, 1-5 parts of licorice extract and 1-5 parts of proanthocyanidins.

[0018] The above-mentioned flavonoids, such as 3,4,5,7-tetrahydroxyflavone in peanut shell extract, have antioxidant activity components, and their antioxidant activity is equivalent to BHT and higher than tocopherol. Other flavonoids, such as licorice extract, proanthocyanidins, etc., also have significant antioxidant capacity.

[0019] Preferably, the above-mentioned synergist also includes 1-5 parts of lecithin and 3-5 parts of ascorbic acid.

[0020] Preferably, a method for preparing a composite antioxidant comprises the following steps:

[0021] Step 1: Pretreatment and grinding of antioxidant raw materials: first, prepare butylated hydroxytoluene, tertiary butylhydroquinone, activated carbon and calcium carbonate crushed particles, rosemary, peanut shells, walnut leaves, orange peels and apples left over from making feed; the operator puts the rosemary, peanut shells, walnut leaves, orange peels and apples into the grinder for complete grinding and crushing, takes out each group of crushed materials, and then finely screens each group of crushed materials, puts unqualified powders that are not completely crushed back into the grinder for secondary grinding until the materials are fully crushed, and takes out each group of powders after screening and places them separately;

[0022] Step 2: Purify the antioxidant raw material to obtain an extract: dissolve the crushed materials of each component in an ethanol solution, and then use ultrasonic purification to extract the extracts of each component; wherein the crude material is dissolved in an ethanol solution with an ethanol content of 75%, and the weight of the ethanol solution used is 4-5 times that of the crude material to be dissolved, and then the extraction is carried out under the conditions of a pressure of 25 MPa and a temperature of 30°C, and the extract is obtained;

[0023] Step 3: Centrifuge and purify the extract: After extracting the extract in step 2, add it into a centrifuge for purification at a temperature of 20-35° C. The purification time is 45-60 minutes.

[0024] Step 4: Let the purified solution stand: After centrifugal purification is completed, let the solution stand for 2-3 hours at a temperature of 15-25°C, and then the staff will take the upper clear liquid of the solution as the extract.

[0025] Step 5, mixing the antioxidant components: adding the synergist and the extract of each component into a chemical reactor according to the proportion, weighing each component according to the formula ratio, and then spraying ethoxyquinoline on the calcium carbonate mixture while stirring; wherein the internal temperature range of the reactor is 80-90°C;

[0026] The sprayed and stirred mixture is mixed with other remaining components and stirred evenly; when the operator continues to stir until the materials are completely dissolved, the first batch of mixture is obtained.

[0027] Step 6, carrier adsorption: slowly spray the first batch of mixture into the zeolite powder, stir and mix while adding, finally add the flow aid silicon dioxide, mix the silicon dioxide and zeolite powder in a mass ratio of 0.7:1, and then add the metal ion passivator as a catalyst for the preparation. The operator stirs while adding, and after mixing evenly, use the residual heat to stand and adsorb before discharging, and the standing time is 1.5 hours to obtain the finished composite antioxidant.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention proposes a composite antioxidant and a preparation method. Compared with the traditional single-component antioxidant, the composite antioxidant prepared by the present invention has higher antioxidant performance. Synergists such as citric acid, lecithin, ascorbic acid, silicon dioxide, zeolite powder and metal ion passivator carriers are added. Through synergistic effect, the composite antioxidant has higher antioxidant performance. When mixed with antioxidants, it has synergistic and solubilizing effects and exerts a synergistic effect.

[0030] 2. The present invention uses natural Chinese herbal extracts such as rosemary phenol as components of antioxidants, which can not only effectively prevent feed oxidation and deterioration, but also rosemary phenol itself has an aroma, which can improve the comfort of using feed antioxidants; the present invention uses discarded orange peel as raw material, which not only alleviates environmental pressure, but also rationally utilizes resources and is a way to turn waste into treasure. At the same time, peanut shell polyphenols, walnut leaf polyphenols and apple polyphenols are all residues from feed raw materials. The present invention rationally utilizes the residues of feed production, avoids waste of resources and reduces the cost of preparing oxidant raw materials.

[0031] 3. In the process of preparing the antioxidant of the present invention, a carrier is added. The carrier is a substance used to adsorb antioxidants and synergists, which helps to evenly disperse these active ingredients in the final product. The carrier can be a suitable solid or liquid, selected according to the specific preparation method and application scenario. A metal ion passivator is used to inhibit the catalytic effect of metal ions and prevent them from inducing degradation reactions of polymers, thereby assisting the preparation process of the antioxidant and improving the reaction efficiency of the composite antioxidant. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a flow chart of the chemical preparation method of the composite antioxidant system. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0035] A composite antioxidant, comprising the following raw material components in percentage by weight: 28-38% antioxidant, 10-18% synergist, including citrate, vitamin C, vitamin E, carotenoids, polyphenol compounds and flavonoid compounds, and the balance is a carrier;

[0036] The above-mentioned vitamin E, vitamin C, polyphenols and carotenoids are used, and have good antioxidant properties, and are widely used in the food and cosmetics industries.

[0037] The antioxidant comprises raw material components in weight percentage: 2-66% ethoxyquinoline, 2-50% butylated hydroxytoluene, 0.5-30% tertiary butylhydroquinone, 2-15% activated carbon, 1-10% calcium chloride, 10-80% calcium carbonate, the granularity of butylated hydroxytoluene, tertiary butylhydroquinone, activated carbon and calcium carbonate all passing through a 60-mesh sieve, 30-40 parts of rosemary essential oil, 4-10 parts of peanut shell polyphenol extract, 2-5 parts of walnut leaf polyphenol extract, 10-20 parts of orange peel extract, and 5-10 parts of apple polyphenol extract;

[0038] The above antioxidants are used as the core components of the composite antioxidant, which are responsible for the main antioxidant function. These antioxidants prevent the chain reaction of free radicals by providing hydrogen atoms; these components are mixed and purified, and then combined with a carrier to form a composite antioxidant with high antioxidant effect.

[0039] The synergist includes 1-5 parts of citrate, 1-5 parts of vitamin C, 3-5 parts of vitamin E, and 10-15 parts of carotenoids; the polyphenolic compounds include chlorogenic acid and ellagic acid, with 1-5 parts of chlorogenic acid and ellagic acid respectively;

[0040] The above-mentioned enhancers are used to improve the antioxidant effect of the composite antioxidant. These ingredients are added during the preparation process to enhance the efficacy of the antioxidant. Polyphenol compounds, including chlorogenic acid, ellagic acid, etc., have the function of scavenging free radicals and inhibiting enzymatic oxidation. These raw material components can be selected and combined according to specific application scenarios and needs to achieve the best antioxidant effect.

[0041] The carrier includes silicon dioxide, zeolite powder and a metal ion passivator. The silicon dioxide and zeolite powder are mixed at a mass ratio of 0.7:1, and then the metal ion passivator is added to inhibit the catalytic effect.

[0042] The above-mentioned carrier is a substance used to adsorb antioxidants and synergists, which helps to evenly disperse these active ingredients in the final product. The carrier can be a suitable solid or liquid, which is selected according to the specific preparation method and application scenario.

[0043] Metal ion passivators, including copper ions or iron ions, EDTA and its derivatives are often used as chelating agents for metal ions. After mixing, a carrier is obtained, and the particle size of the carrier is 40-80 meshes.

[0044] The above metal ion passivator is used to inhibit the catalytic effect of metal ions (such as copper, iron, etc.) to prevent them from inducing polymer degradation reactions.

[0045] The flavonoid compound comprises 1-5 parts of 3,4,5,7-tetrahydroxyflavone in peanut shell extract, 1-5 parts of licorice extract and 1-5 parts of proanthocyanidins.

[0046] The above-mentioned flavonoids, such as 3,4,5,7-tetrahydroxyflavone in peanut shell extract, have antioxidant activity components, and their antioxidant activity is equivalent to BHT and higher than tocopherol. Other flavonoids, such as licorice extract, proanthocyanidins, etc., also have significant antioxidant capacity.

[0047] The above-mentioned enhancer also includes 1-5 parts of lecithin and 3-5 parts of ascorbic acid.

[0048] Implementation 1:

[0049] Combination Figure 1 The present invention provides a technical solution: a preparation method of a composite antioxidant, which adopts a chemical reaction method: comprising the following steps: step 1, pretreatment and grinding of antioxidant raw materials: first, prepare butylated hydroxytoluene, tertiary butylhydroquinone, activated carbon and calcium carbonate crushed particles, rosemary, peanut shells, walnut leaves, orange peels and apples left over from making feed; an operator places rosemary, peanut shells, walnut leaves, orange peels and apples into a grinder for complete grinding and crushing, takes out each group of crushed materials, and then finely screens each group of crushed materials, puts unqualified powders that are not completely crushed back into the grinder for secondary grinding until the materials are fully crushed, and takes out each group of powders after screening and places them separately;

[0050] Step 2: Purify the antioxidant raw material to obtain an extract: dissolve the crushed materials of each component in an ethanol solution, and then use ultrasonic purification to extract the extracts of each component; wherein the crude material is dissolved in an ethanol solution with an ethanol content of 75%, and the weight of the ethanol solution used is 4-5 times that of the crude material to be dissolved, and then the extraction is carried out under the conditions of a pressure of 25 MPa and a temperature of 30°C, and the extract is obtained;

[0051] Step 3: Centrifuge and purify the extract: After extracting the extract in step 2, add it into a centrifuge for purification at a temperature of 20-35°C for 45-60 minutes.

[0052] Step 4: Let the purified solution stand: After centrifugal purification is completed, let the solution stand for 2-3 hours at a temperature of 15-25°C, and then the staff will take the upper clear liquid of the solution as the extract.

[0053] Step 5, mixing the antioxidant components: adding the synergist and extract of each component into a chemical reactor according to the proportion, weighing each component according to the formula ratio, and then spraying ethoxyquinoline on the calcium carbonate mixture while stirring; wherein the internal temperature range of the reactor is 80-90° C.; mixing the sprayed and stirred mixture with other remaining components and stirring evenly; when the operator continuously stirs to completely dissolve the material, the first batch of the mixture is obtained.

[0054] Step 6, carrier adsorption: slowly spray the first batch of mixture into the zeolite powder, stir and mix while adding, finally add the flow aid silicon dioxide, mix the silicon dioxide and zeolite powder in a mass ratio of 0.7:1, and then add the metal ion passivator as a catalyst for the preparation. The operator stirs while adding, and after mixing evenly, use the residual heat to stand and adsorb before discharging, and the standing time is 1.5 hours to obtain the finished composite antioxidant.

[0055] Implementation 2:

[0056] The difference between this embodiment and embodiment 1 is that the present invention provides a technical solution that adopts a natural extraction method, using a method for extracting and preparing citrus pectin:

[0057] Step 1: The process of extracting citrus pectin mainly includes raw material pretreatment, extraction, separation, concentration, cooling, ethanol precipitation, washing, vacuum drying and other steps;

[0058] Step 2: Extracting citrus pectin; the raw material pretreatment stage includes heating to 95°C for a certain period of time to inactivate pectinase and prevent pectin decomposition, and hydrolyzing pectin under dilute acid conditions by acid extraction;

[0059] Step 3: Chemical reaction: The citrus pectin aqueous solution extracted in step 2 is mixed with a hydrogen peroxide H2O2 aqueous solution, and then irradiated under ultraviolet light for a certain period of time to obtain degradation products. Substances with a molecular weight greater than or equal to 100 kDa are separated from these degradation products. These substances have good antioxidant properties and can be used to prepare antioxidants.

[0060] In summary, the composite antioxidant and preparation method proposed in the present invention have higher antioxidant performance than traditional single-component antioxidants. Synergists such as citric acid, lecithin, and ascorbic acid are added, and silicon dioxide, zeolite powder, and metal ion passivator carriers are added. Through synergistic effects, the composite antioxidant has higher antioxidant performance, and is mixed with antioxidants to enhance synergy and solubilize, thereby exerting a synergistic effect.

[0061] The invention uses natural Chinese herbal medicine extracts such as rosemary phenol as components of the antioxidant, which can not only effectively prevent feed oxidation and deterioration, but also rosemary phenol itself has an aroma, which can improve the comfort of using the feed antioxidant; the invention uses discarded orange peel as a raw material, which not only alleviates environmental pressure, but also reasonably utilizes resources and is a way to turn waste into treasure. At the same time, peanut shell polyphenols, walnut leaf polyphenols and apple polyphenols are all residues from feed raw materials. The invention reasonably utilizes the residues of feed production, avoids waste of resources and reduces the cost of preparing oxidant raw materials.

[0062] In the process of preparing the antioxidant of the present invention, a carrier is added. The carrier is a substance used to adsorb the antioxidant and the synergist, and it helps to evenly disperse these active ingredients in the final product. The carrier can be a suitable solid or liquid, and is selected according to the specific preparation method and application scenario. A metal ion passivator is used to inhibit the catalytic effect of metal ions and prevent them from inducing degradation reactions of polymers, thereby assisting the preparation process of the antioxidant and improving the reaction efficiency of the composite antioxidant.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite antioxidant, characterized in that: The raw material components include the following weight percentages: 28-38% antioxidant, 10-18% synergist, including citrate, vitamin C, vitamin E, carotenoids, polyphenol compounds and flavonoid compounds, and the balance is carrier; The antioxidant comprises raw material components in weight percentage: 2-66% ethoxyquinoline, 2-50% butylated hydroxytoluene, 0.5-30% tertiary butylhydroquinone, 2-15% activated carbon, 1-10% calcium chloride, 10-80% calcium carbonate, wherein the butylated hydroxytoluene, tertiary butylhydroquinone, activated carbon and calcium carbonate are all ground to pass a 60-mesh sieve, 30-40 parts of rosemary essential oil, 4-10 parts of peanut shell polyphenol extract, 2-5 parts of walnut leaf polyphenol extract, 10-20 parts of orange peel extract and 5-10 parts of apple polyphenol extract; The synergist includes 1-5 parts of citrate, 1-5 parts of vitamin C, 3-5 parts of vitamin E, and 10-15 parts of carotenoids; the polyphenolic compounds include chlorogenic acid and ellagic acid, with 1-5 parts of chlorogenic acid and ellagic acid respectively; The carrier includes silicon dioxide, zeolite powder and a metal ion passivator. The silicon dioxide and the zeolite powder are mixed in a mass ratio of 0.7:1, and then the metal ion passivator is added to inhibit the catalytic effect.

2. A composite antioxidant according to claim 1, characterized in that: The metal ion passivator includes copper ions or iron ions. EDTA and its derivatives are often used as chelating agents for metal ions. After mixing, a carrier is obtained, and the particle size of the carrier is 40-80 meshes.

3. A composite antioxidant according to claim 3, characterized in that: The flavonoid compound comprises 1-5 parts of 3,4,5,7-tetrahydroxyflavone in peanut shell extract, 1-5 parts of licorice extract and 1-5 parts of proanthocyanidins.

4. A composite antioxidant according to claim 4, characterized in that: The synergist also includes 1-5 parts of lecithin and 3-5 parts of ascorbic acid.

5. A method for preparing a composite antioxidant according to claims 1-4, characterized in that: The method comprises the following steps: step 1, pretreatment and grinding of antioxidant raw materials: firstly, preparing butylated hydroxytoluene, tertiary butylhydroquinone, activated carbon and calcium carbonate crushed particles, rosemary, peanut shells, walnut leaves, orange peels and apples left over from making feed; an operator respectively places rosemary, peanut shells, walnut leaves, orange peels and apples into a grinder for complete grinding and crushing, takes out each group of crushed materials, and then finely screens each group of crushed materials, puts unqualified powder materials that are not completely crushed back into the grinder for secondary grinding until the materials are fully crushed, and takes out each group of powder materials after screening and places them separately.

6. The method for preparing a composite antioxidant according to claim 5, characterized in that: The following steps are also included: Step 2: Purify the antioxidant raw material to obtain an extract: dissolve the crushed materials of each component in an ethanol solution, and then use ultrasonic purification to extract the extract of each component; The crude material is dissolved in an ethanol solution with an ethanol content of 75%, and the weight of the ethanol solution used is 4-5 times the weight of the crude material to be dissolved. Then, extraction is performed under the conditions of a pressure of 25 MPa and a temperature of 30° C., and an extract is obtained; Step 3: Centrifuge and purify the extract: After extracting the extract in step 2, add it into a centrifuge for purification at a temperature of 20-35° C. The purification time is 45-60 minutes. Step 4: Let the purified solution stand: After centrifugal purification is completed, let the solution stand for 2-3 hours at a temperature of 15-25°C, and then the staff will take the upper clear liquid of the solution as the extract.

7. A composite antioxidant and preparation method according to claim 6, characterized in that: Step 5, mixing the antioxidant components: adding the synergist and the extract of each component to a chemical reactor according to a proportion, weighing each component according to the formula ratio, and then spraying ethoxyquinoline on the calcium carbonate mixture while stirring; wherein the internal temperature range of the reactor is 80-90°C; The sprayed and stirred mixture is mixed with other remaining components and stirred evenly; when the operator continues to stir until the materials are completely dissolved, the first batch of mixture is obtained.

8. A composite antioxidant and preparation method according to claim 7, characterized in that: Step 6, carrier adsorption: slowly spray the first batch of mixture into the zeolite powder, stir and mix while adding, finally add the flow aid silicon dioxide, mix the silicon dioxide and zeolite powder in a mass ratio of 0.7:1, and then add the metal ion passivator as a catalyst for the preparation. The operator stirs while adding, and after mixing evenly, use the residual heat to stand and adsorb before discharging, and the standing time is 1.5 hours to obtain the finished composite antioxidant.

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