CN105831424B - A kind of feed antioxidant, preparation method and feed anti-oxidation method being resistant to itself decaying - Google Patents
A kind of feed antioxidant, preparation method and feed anti-oxidation method being resistant to itself decaying Download PDFInfo
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- CN105831424B CN105831424B CN201610223208.9A CN201610223208A CN105831424B CN 105831424 B CN105831424 B CN 105831424B CN 201610223208 A CN201610223208 A CN 201610223208A CN 105831424 B CN105831424 B CN 105831424B
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Abstract
The invention discloses a kind of feed antioxidant, preparation method and feed anti-oxidation method for being resistant to itself decaying, feed antioxidant quality is configured to, dibutyl hydroxy toluene 1.0~20.0%；Citric acid 1.0~15.0%；Ethoxyquinoline 1.0~30.0%；Glycerin monostearate 0.1~15.0%；Polyethylene glycol glycerol monoricinolein 0.1~15.0%；Stearic acid 1.0~15.0%；Silica 1 .0~65.0%；Remaining is carrier zeolite powder.When producing feed, it is uniformly mixed using feed antioxidant as a kind of of additive with other raw materials of production feed, then pelletizes.This feed antioxidant can reduce from its produce after to itself attenuation problem in this period before feed factory addition, the performance for being added to its effect in feed is not influenced again simultaneously, thus solves the problems, such as to influence Feed Enterprise just deep fades before antioxidant use for a long time.
Description
Technical field
The present invention relates to feed addictive more particularly to a kind of feed antioxidants, also relate to the antioxidant
Preparation method and use antioxidant realization feed antioxidation method.This feed antioxidant can be reduced from its production
To itself attenuation problem in this period before feed factory addition after out, to solve the long-term Feed Enterprise that influences anti-oxidant
Agent using it is preceding just deep fades the problem of, belong to field of feed additive technology.
Background technique
Feed is easy to oxidize during storage.Rotten substance easy to oxidize is mainly grease and vitamin in feed,
They are very important nutritional ingredient in feed simultaneously.In order to slow down oxidation process, antioxidant is often added in feed.
The basic principle of feed antioxidant is exactly that antioxidant is easily oxidized by the air itself, at least more oxidizable than in feed
Rotten substance is easier to be oxidized by the air, to sacrifice oneself to protect the freshness of feed, guarantees the stay in grade of feed.
Currently, the kind that feed antioxidant uses mainly has single ethoxyquinoline and composite type antioxidant agent two big
Class.The kind that compound antioxidant uses mainly has ethoxyquinoline, butylated hydroxy anisole (BHA), dibutyl hydroxy
Toluene (BHT), propylgallate (PG), tert-butylhydroquinone (TBHQ), tea polyphenols, vitamin E, L-AA -6-
Palmitate and Rosmarinus officinalis extract.At present no matter which type of feed antioxidant, be not it is ready-to-use, require
By intermediate links, after producing from feed additive enterprises, it is added in feed before use to Feed Enterprise, has
One time course, it is then 1-2 weeks short, it is long then reach several moons.Although this time course is under normal circumstances all in feed antioxidant
In the shelf-life of product, as soon as but from the basic principle of antioxidant it is known that from antioxidant is produced from it,
It is constantly being aoxidized by the oxygen in air, that is to say, that own is constantly decaying, and oxidation resistant ability is gradually declining.
The antioxidant as ethoxyquinoline is exactly an apparent example, and color can deepen after own oxidation by air, when
We have seen that feed antioxidant itself darkens, just illustrate that own has decayed.And some antioxidants are certainly
After body oxidation by air, color does not change, and has surely found it with regard to different without the user of this respect professional knowledge
, there is certain concealment in the fact that through decaying.According to incompletely statistics, feed antioxidant is after producing 60 days, attenuation ratio
Example be up to 30-50%, some storage, transportation environment it is severe it is more taller than this ratio very much.Feed antioxidant is preceding just in use
This phenomenon of attenuation by oxygen is generally existing and very serious, and annoyings feedstuff industry always.
How to solve the problems, such as that feed antioxidant feed quality caused by using preceding decaying reduces theoretically,
Most simple, most effective method is exactly ready-to-use, but for the today's society of division of labor in society highly-specialised, not
May, if Feed Enterprise can oneself be ready-to-use, the special manufacturing enterprise of feed antioxidant is just not present.So
It is typically all to increase dosage in reality, improves safety factor, only this item is more than one hundred million with regard to increasing cost for China's feedstuff industry every year
Member.Up to the present, there is not been reported for the solution in relation to feed antioxidant itself anti-attenuation.
Summary of the invention
In view of the above shortcomings of the prior art, it is an object of the invention to propose a kind of feed antioxidant, this feeding
Material antioxidant can be reduced produced from it after added to feed factory before itself attenuation problem in this period, simultaneously
Do not influence the performance for being added to its effect in feed again, thus solve it is long-term influence Feed Enterprise antioxidant using it is preceding just
The problem of through deep fades.
The present invention also relates to the preparation method of the antioxidant and realizes that feed is anti-oxidant using the antioxidant
Method.
The technical scheme of the present invention is realized as follows:
A kind of feed antioxidant being resistant to itself decaying, it is grouped as by each group of following mass percent, dibutyl
Hydroxy-methylbenzene 1.0~20.0%；Citric acid 1.0~15.0%；Ethoxyquinoline 1.0~30.0%；Glycerin monostearate 0.1~
15.0%；Polyethylene glycol glycerol monoricinolein 0.1~15.0%；Stearic acid 1.0~15.0%；Silica 1 .0~65.0%；Remaining
For carrier zeolite powder.
Each component preferred mass percentage is dibutyl hydroxy toluene 1.0~15.0%；Citric acid 1.0~10.0%；Ethoxy
Base quinoline 1.0~20.0%；Glycerin monostearate 0.1~8.0%；Polyethylene glycol glycerol monoricinolein 0.1~8.0%；Stearic acid
1.0~15.0%；Silica 1 .0~45.0%；Remaining is carrier zeolite powder.
The preparation method of above-mentioned feed antioxidant, steps are as follows,
(1) by glycerin monostearate 60~70 DEG C of heating fusings in a kettle；
(2) dibutyl hydroxy toluene and citric acid are placed in the reaction kettle of step (1) together with glycerin monostearate after
It is continuous to be heated to 70~80 DEG C of fusings, obtain mixing liquid；
(3) ethoxyquinoline and polyethylene glycol glycerol monoricinolein are added in mixing liquid prepared by step (2), are mixed
It closes uniformly, obtains homogeneous mixture liquid；
(4) silica is added to the mixer, it, slowly will be prepared by step (3) under conditions of mixing machine is opened
Homogeneous mixture liquid is added to the mixer adsorption forming, obtains mixture of powders I；
(5) stearic acid is heated to fusing at 60~70 DEG C；
(6) stearic acid after step (5) fusing is added to mixture of powders I prepared by step (4) with spray pattern
In, and stir evenly, it is cooled to not higher than 3~5 DEG C of room temperature, obtains mixture of powders II, II surface of mixture of powders is coated with one
Layer stearic acid film；
(7) carrier zeolite powder is added in mixture of powders II prepared by step (6) and is uniformly mixed to get feed antioxygen
Agent；When mixing, the frictional force generated between mixture is less than stearic acid film breaks active force, so that stearic acid film is not broken
It splits.
A kind of feed anti-oxidation method, when producing feed, using the feed antioxidant of aforementioned preparation as additive
It is a kind of to be uniformly mixed with other raw materials that produce feed, then pelletize；When mixing, what is generated between mixture rubs
It wipes power and is greater than stearic acid film breaks active force, so that stearic acid film breaks, so that feed antioxidant be made to start to release
Effective component prevents feed other compositions from aoxidizing using the effective component.
Wherein pelleting temperature is higher than stearic acid fusion temperature, so as to not have the stearic acid film of rupture in granulation temperature when mixing
It is completely melt to rupture under degree.The pelleting temperature is preferably 80~90 DEG C.
The feed antioxidant presses 200-400 g tons of feed addition.
Compared with prior art, the beneficial effects are mainly reflected as follows:
1, the present invention is coated with one layer of stearic acid coating on antioxidant surface, can effectively completely cut off air, which can
Slow down feed antioxidant after producing to itself attenuation problem in this period before feed factory addition.With feed
Coating ruptures when mixing granulation, and antioxidant just starts to play its effect at this time, thus solves the long-term Feed Enterprise that influences anti-
Oxidant using it is preceding just deep fades the problem of.
2, for the present invention using absorption processing technology is merged again, production energy consumption is low.The all materials that the present invention selects need to add
The maximum temperature of heat fusing is no more than 80 DEG C, and partial material room temperature is liquid, is not required to heating fusing at all, low energy consumption.
3, production equipment cost of the present invention is not high.Used equipment is all conventional premix material additive mixing machine and can
The reaction kettle of heating, then a set of liquid spraying device and homogenizer are installed, it is flowed with used by field of medicaments film-coating technique
Change bed to compare with spray drying device, equipment cost low 70% or more.
4, coating of the present invention is at low cost.The present invention is commonly high with field of medicaments using conventional stearic acid as coating agent
Molecule resin material is compared with colloidal substance, and cost wants low 50% or more.
5, easy to use.Application method is as conventional feed additive, by way of premix, is added to by a certain percentage
It is uniformly mixed in feed.Additive amount is according to rotten substance (such as grease, vitamin) content height oxidizable in feed
And feed needs to store, the time of circulation takes the circumstances into consideration to add, and dosage is recommended to be generally 200-400 g tons of feed.
Detailed description of the invention
The processing process figure of Fig. 1-antioxidant of the present invention.
The anti-attenuation effect contrast figure of Fig. 2-antioxidant of the present invention and common antioxidants under 37 DEG C of high temperature.
The anti-attenuation effect contrast figure of 1 antioxidant of Fig. 3-embodiment and common antioxidants under 37 DEG C of high temperature.
The anti-attenuation effect contrast figure of 2 antioxidant of Fig. 4-embodiment and common antioxidants under 37 DEG C of high temperature.
The anti-attenuation effect contrast figure of 3 antioxidant of Fig. 5-embodiment and common antioxidants under 37 DEG C of high temperature.
Specific embodiment
Feed antioxidant of the present invention, it is grouped as by each group of following mass percent, and dibutyl hydroxy toluene 1.0~
20.0%；Citric acid 1.0~15.0%；Ethoxyquinoline 1.0~30.0%；Glycerin monostearate 0.1~15.0%；Polyethylene glycol
Glycerol monoricinolein 0.1~15.0%；Stearic acid 1.0~15.0%；Silica 1 .0~65.0%；Remaining is carrier zeolite powder.
Each component preferred mass percentage is dibutyl hydroxy toluene 1.0~15.0%；Citric acid 1.0~10.0%；Ethoxy
Base quinoline 1.0~20.0%；Glycerin monostearate 0.1~8.0%；Polyethylene glycol glycerol monoricinolein 0.1~8.0%；Stearic acid
1.0~15.0%；Silica 1 .0~45.0%；Remaining is carrier zeolite powder.
Above-mentioned feed antioxidant preparation method, steps are as follows, referring also to Fig. 1；
(1) by glycerin monostearate 60~70 DEG C of heating fusings in a kettle；
(2) dibutyl hydroxy toluene and citric acid are placed in the reaction kettle of step (1) continue to be heated to 70~80 DEG C it is molten
Change, obtains mixing liquid；
(3) ethoxyquinoline and polyethylene glycol glycerol monoricinolein are added in mixing liquid prepared by step (2), are mixed
It closes uniformly, obtains homogeneous mixture liquid；
(4) silica is added to the mixer, it, slowly will be prepared by step (3) under conditions of mixing machine is opened
Homogeneous mixture liquid is added to the mixer adsorption forming, obtains mixture of powders I；
(5) stearic acid is heated to fusing at 60~70 DEG C；
(6) stearic acid after step (5) fusing is added to mixture of powders I prepared by step (4) with spray pattern
In, and stir evenly, it is cooled to not higher than 3~5 DEG C of room temperature, obtains mixture of powders II, II surface of mixture of powders is coated with one
Layer stearic acid film；
(7) carrier zeolite powder is added in mixture of powders II prepared by step (6) and is uniformly mixed to get feed antioxygen
Agent；When mixing, the frictional force generated between mixture is less than stearic acid film breaks active force, so that stearic acid film is not broken
It splits.
Antioxidant of the present invention is easy to use.When producing feed, using the feed antioxidant of preparation as additive
It is a kind of to be uniformly mixed with other raw materials that produce feed, then pelletize.When mixing, what is generated between mixture rubs
It wipes power and is greater than stearic acid film breaks active force, so that stearic acid film breaks, so that feed antioxidant be made to start to release
Effective component prevents feed other compositions from aoxidizing using the effective component, to prevent feed oxide rotten.
Pelleting temperature is higher than stearic acid fusion temperature simultaneously, so as to not have the stearic acid film of rupture in granulation temperature when mixing
It is further completely melt to rupture under degree, thoroughly releases all effective components.The pelleting temperature is 80~90 DEG C.
Feed antioxidant additive amount is according to rotten substance (such as grease, vitamin) content height oxidizable in feed
And feed needs to store, the time of circulation takes the circumstances into consideration to add, and dosage is recommended to be generally 200-400 g tons of feed.It is preferred that 300 g tons
Feed.
Present invention incorporates the advanced skills of the multiple subjects such as physical chemistry, chemical engineering, equation, surfactant
Art, it is lower than the film-coating technique cost that field of medicaments uses using merging absorption processing technology again, it is more practical, it can effective protection
Antioxidant uses preceding unattenuated.Macromolecule film-coating technique used by field of medicaments, although antioxidant may also be reached certainly
The purpose of body anti-attenuation, but fluid unit used in its processing technology and spray drying device price are high, production capacity is low, energy
Consumption is big, and the macromolecule resin material and colloidal substance price that coating generally uses are high, and coating cost is big, can only be suitable for price
The products such as medicine high, demanding to product appearance quality or medicated premix, and it is low to price, to product appearance quality requirement
Not high feed antioxidant is but not appropriate for.
Production equipment cost of the present invention is not high.Used equipment is all conventional premix material additive mixing machine and Ke Jia
The reaction kettle of heat, then a set of liquid spraying device and homogenizer are installed, it is fluidized with used by field of medicaments film-coating technique
Bed is compared with spray drying device, equipment cost low 70% or more.
The present invention can wrap, and put and obtain.Coating effect of the present invention is good, can effectively completely cut off air, prevents antioxidant certainly
It is aoxidized before using by the oxygen in air, referred to as wraps.Coating effect is tested under 37 DEG C of high temperature, is resisted
The attenuation ratio of oxidant is remarkably decreased than common antioxidants, sees Fig. 2.The attenuation ratio of antioxidant=(antioxidant configuration
When theoretical content-antioxidant survey content) configuration of/antioxidant when theoretical content * 100%.
Be added in feed after use, feed mixing machine stirring material frictional force (remarks: mixing machine mix when rub
The size of power depends on the size of mixing machine, and it is 250~500kg/ batch, Feed Enterprise that this antioxidant, which prepares mixing machine used,
Mixing machine used is 1000~2000kg/ batch, therefore not will lead to film breaks under this preparation method, and Feed Enterprise mixes
Machine can but make its film breaks) effect under, film gradually ruptures, since feed mixing slowly release effectively at
Point, effect anti-oxidant, that protection feed quality is stable is played to feed.From preparation method it is found that the film substrate stearic acid exists
60~70 DEG C melt.So even if the film that is not broken on a small quantity is in the subsequent feedstuff pelletization technology stage when feed mixes,
Pelleting temperature generally all 80~90 DEG C even more than, can also be completely melt, thoroughly release all effective components and (put
Out), play the role of abundant oxidation resistanct fresh-keeping.
The present invention is described further combined with specific embodiments below, but protection scope of the present invention is not limited in
This:
Embodiment 1:
1, the mass percent of each component is dibutyl hydroxy toluene (BHT) 5.0%, citric acid 5.0%, ethyoxyl
Quinoline 10.0%, glycerin monostearate 0.4%, polyethylene glycol glycerol monoricinolein 0.4%, stearic acid 6.0%, silica
20.0%, zeolite powder 53.2%.
2, preparation method:
(1) by 60~70 DEG C of heating fusings in a kettle of 1.0kg glycerin monostearate.
(2) 12.5kg dibutyl hydroxy toluene (BHT) and 12.5kg citric acid are placed on and continue to be heated to 70 in reaction kettle
~80 DEG C of fusings.
(3) 25.0kg ethoxyquinoline and 1.0kg polyethylene glycol glycerol monoricinolein are added prepared by step (2) mixed
It closes in liquid, through homogenizer homogeneous 1 minute of 1000 revs/min.
(4) 50.0kg silica is added to the mixer, under conditions of mixing machine is opened, slowly by step (3) institute
The homogeneous mixture liquid of preparation is added to the mixer adsorption forming.
(5) 60~70 DEG C of heating fusings in conservation tank by 15.0kg stearic acid.
(6) liquid spray prepared by step (5) is added in mixture of powders prepared by step (4), and stirred
Uniformly, it is cooled to not higher than 3~5 DEG C of room temperature.
(7) 133.0kg zeolite powder is added in mixed-powder prepared by step (6) be uniformly mixed to get 250kg at
Product.
3, under 37 DEG C of high temperature, the attenuation ratio under this antioxidant and common antioxidants different time is measured, and sees figure
3。
Embodiment 2:
1, the mass percent of each component is dibutyl hydroxy toluene (BHT) 10.0%, citric acid 10.0%, ethoxy
Base quinoline 15.0%, glycerin monostearate 0.7%, polyethylene glycol glycerol monoricinolein 0.7%, stearic acid 10.5%, silica
35.0%, zeolite powder 18.1%.
2, preparation method:
(1) by 60~70 DEG C of heating fusings in a kettle of 1.75kg glycerin monostearate.
(2) 25.0kg dibutyl hydroxy toluene (BHT) and 25kg citric acid are placed in reaction kettle continue to be heated to 70~
80 DEG C of fusings.
(3) 37.5kg ethoxyquinoline and 1.75kg polyethylene glycol glycerol monoricinolein are added prepared by step (2)
In mixing liquid, through homogenizer homogeneous 1 minute of 1000 revs/min.
(4) 87.5kg silica is added to the mixer, under conditions of mixing machine is opened, slowly by step (3) institute
The homogeneous mixture liquid of preparation is added to the mixer adsorption forming.
(5) 60~70 DEG C of heating fusings in conservation tank by 26.25kg stearic acid.
(6) liquid spray prepared by step (5) is added in mixture of powders prepared by step (4), and stirred
Uniformly, it is cooled to not higher than 3~5 DEG C of room temperature.
(7) 45.25kg zeolite powder is added in mixed-powder prepared by step (6) be uniformly mixed to get 250.0kg at
Product.
3, under 37 DEG C of high temperature, the attenuation ratio under this antioxidant and common antioxidants different time is measured, and sees figure
4, in three case study on implementation, the attenuation ratio of the implementation case is minimum, and effect is best.
Embodiment 3:
1, the mass percent of each component is dibutyl hydroxy toluene (BHT) 7.0%, citric acid 7.0%, ethyoxyl
Quinoline 6.0%, glycerin monostearate 0.4%, polyethylene glycol glycerol monoricinolein 0.4%, stearic acid 6.0%, silica
20.0%, zeolite powder 53.2%.
2, preparation method:
(1) by 60~70 DEG C of heating fusings in a kettle of 1.0kg glycerin monostearate.
(2) 17.5kg dibutyl hydroxy toluene (BHT) and 17.5kg citric acid are placed on and continue to be heated to 70 in reaction kettle
~80 DEG C of fusings.
(3) 15.0kg ethoxyquinoline and 1.0kg polyethylene glycol glycerol monoricinolein are added prepared by step (2) mixed
It closes in liquid, through homogenizer homogeneous 1 minute of 1000 revs/min.
(4) 50.0kg silica is added to the mixer, under conditions of mixing machine is opened, slowly by step (3) institute
The homogeneous mixture liquid of preparation is added to the mixer adsorption forming.
(5) 60~70 DEG C of heating fusings in conservation tank by 15.0kg stearic acid.
(6) liquid spray prepared by step (5) is added in mixture of powders prepared by step (4), and stirred
Uniformly, it is cooled to not higher than 3~5 DEG C of room temperature.
(7) 133.0kg zeolite powder is added in mixed-powder prepared by step (6) be uniformly mixed to get 250.0kg at
Product.
3, under 37 DEG C of high temperature, the attenuation ratio under this antioxidant and common antioxidants different time is measured, and sees figure
5。
The present invention using absorption processing technology is merged again, and simple equipments, production capacity is high, and low energy consumption, is wrapped, is put and obtain, make
With conveniently, it can effectively solve feed antioxidant and produce itself attenuation problem come and be added in feed before use from one,
Only needing to add this product in feed preparation process (can recommend dosage 0.2~0.4 ‰, being converted into a ton feed is exactly 200-
400 grams), so that it may the stabilization of effective protection feed quality.This product can be used for all and need to add the pre- of feed antioxidant
Mixing and mixed feed, without limitation.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although Shen
It asks someone to describe the invention in detail referring to preferred embodiment, those skilled in the art should understand that, to this hair
Bright technical solution is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered at this
In the scope of the claims of invention.
Claims (4)
1. a kind of feed anti-oxidation method, it is characterised in that: first prepare feed antioxidant as follows, feed is anti-oxidant
Agent is grouped as by each group of following mass percent, dibutyl hydroxy toluene 1.0~20.0%；Citric acid 1.0~15.0%；Ethoxy
Base quinoline 1.0~30.0%；Glycerin monostearate 0.1~15.0%；Polyethylene glycol glycerol monoricinolein 0.1~15.0%；It is stearic
Acid 1.0~15.0%；Silica 1 .0~65.0%；Remaining is carrier zeolite powder；
(1) by glycerin monostearate 60~70 DEG C of heating fusings in a kettle；
(2) dibutyl hydroxy toluene and citric acid are placed in the reaction kettle of step (1) and continue to add together with glycerin monostearate
Heat obtains mixing liquid to 70~80 DEG C of fusings；
(3) ethoxyquinoline and polyethylene glycol glycerol monoricinolein are added in mixing liquid prepared by step (2), mixing is equal
It is even, obtain homogeneous mixture liquid；
(4) silica is added to the mixer, under conditions of mixing machine is opened, slowly by homogeneous prepared by step (3)
Mixture liquid is added to the mixer adsorption forming, obtains mixture of powders I；
(5) stearic acid is heated to fusing at 60~70 DEG C；
(6) stearic acid after step (5) fusing is added in mixture of powders I prepared by step (4) with spray pattern, and
It stirs evenly, is cooled to not higher than 3~5 DEG C of room temperature, obtain mixture of powders II, II surface of mixture of powders is coated with one layer of tristearin
Sour film；
(7) carrier zeolite powder is added uniformly mixed anti-oxidant to get feed in mixture of powders II prepared by step (6)
Agent；When mixing, the frictional force generated between mixture is less than stearic acid film breaks active force, so that stearic acid film is not broken
It splits；
When producing feed, mixed using the feed antioxidant of preparation as a kind of of additive with other raw materials of production feed
Uniformly, it then pelletizes；When mixing, the frictional force generated between mixture is acted on greater than stearic acid film breaks
Power, so that stearic acid film breaks are prevented so that feed antioxidant be made to start to release effective component using the effective component
The oxidation of feed other compositions；
Pelleting temperature is higher than stearic acid fusion temperature, so as to not have the stearic acid film of rupture complete under pelleting temperature when mixing
Fusing rupture.
2. feed anti-oxidation method according to claim 1, it is characterised in that: the pelleting temperature is 80~90 DEG C.
3. feed anti-oxidation method according to claim 1, it is characterised in that: the feed antioxidant presses 200-400
G ton feed addition.
4. feed anti-oxidation method according to claim 1, it is characterised in that: feed antioxidant each component preferred mass
Percentage is dibutyl hydroxy toluene 1.0~15.0%；Citric acid 1.0~10.0%；Ethoxyquinoline 1.0~20.0%；It is single hard
Glycerol 0.1~8.0%；Polyethylene glycol glycerol monoricinolein 0.1~8.0%；Stearic acid 1.0~15.0%；Silica
1.0~45.0%；Remaining is carrier zeolite powder.
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| CN106359907A (en) * | 2016-08-31 | 2017-02-01 | 广州市义和化工有限公司 | Stearic acid mixture, and preparation method and application thereof |
| CN111165714A (en) * | 2020-01-14 | 2020-05-19 | 江苏奥迈生物科技有限公司 | Special antioxidant for pet food |
| CN114073288B (en) * | 2020-08-14 | 2023-11-24 | 晨光生物科技集团股份有限公司 | Antioxidant composition containing quercetin and marigold |
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| CN102640967A (en) * | 2012-03-31 | 2012-08-22 | 宁波它世界生物科技有限公司 | Complex antioxidant and preparation method thereof |
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