CN117730950A - Zinc sulfate-containing feed additive and production process thereof - Google Patents
Zinc sulfate-containing feed additive and production process thereof Download PDFInfo
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- CN117730950A CN117730950A CN202410064286.3A CN202410064286A CN117730950A CN 117730950 A CN117730950 A CN 117730950A CN 202410064286 A CN202410064286 A CN 202410064286A CN 117730950 A CN117730950 A CN 117730950A
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- 229960001763 zinc sulfate Drugs 0.000 title claims abstract description 68
- 229910000368 zinc sulfate Inorganic materials 0.000 title claims abstract description 68
- 239000003674 animal food additive Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000000341 volatile oil Substances 0.000 claims abstract description 55
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 29
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- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims abstract description 20
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- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000011718 vitamin C Substances 0.000 claims abstract description 20
- 235000019154 vitamin C Nutrition 0.000 claims abstract description 20
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims abstract description 18
- 244000046052 Phaseolus vulgaris Species 0.000 claims abstract description 18
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- 239000007787 solid Substances 0.000 claims description 18
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical group C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims description 17
- 241000723346 Cinnamomum camphora Species 0.000 claims description 17
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- 238000001035 drying Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 12
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- 238000000034 method Methods 0.000 claims description 10
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
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Abstract
The invention relates to the technical field of feed additives and discloses a feed additive containing zinc sulfate and a production process thereof, wherein the feed additive contains an essential oil coating agent, a zinc sulfate slow release agent, vitamin C, leucine and bean shell powder, and is prepared through mixing, granulating and finishing processes, the zinc sulfate slow release agent can slowly release zinc ions at target positions of intestinal tracts, further inhibit growth of harmful bacteria in the intestinal tracts, promote cell proliferation and protein synthesis, effectively protect intestinal health, and can adsorb alkaline substances such as ammonia gas in the intestinal tracts after vermiculite desorption, reduce pH value in the intestinal tracts, and is more beneficial to propagation of beneficial bacteria such as lactobacillus, thereby effectively improving the production performance of broilers.
Description
Technical Field
The invention relates to the technical field of feed additives, in particular to a zinc sulfate-containing feed additive and a production process thereof.
Background
In the modern animal husbandry, broiler chickens have the characteristics of low breeding cost, high economic benefit and the like, so that the broiler chickens become popular breeding varieties, however, the probability of disease of the broiler chickens is increased due to more stress factors in the breeding process of the broiler chickens, and the economic value of the broiler chickens is influenced. However, long-term use of antibiotics can cause drug resistance of intestinal bacteria of broilers, and drug residues can threaten human health, and with the continuous improvement of human knowledge of food safety, antibiotics are gradually forbidden to be used in feeds, so that development of substitutes of antibiotics has important significance to broiler breeding industry.
Zinc is one of trace elements necessary for organisms, has multiple effects of promoting growth, regulating metabolism, resisting oxidation, improving immunity and the like, so at the present stage, inorganic zinc such as zinc sulfate and the like is often used for replacing antibiotics as a feed additive, but the bioavailability of the inorganic zinc is lower, most of the inorganic zinc can be discharged out of the body along with excrement, not only can waste resources, but also can generate certain heavy metal pollution, and therefore, the inorganic zinc is used for replacing antibiotics simply, so that the defect is large in practical application.
The zinc gluconate, the amino acid chelated zinc and other organic zinc are relatively easier to absorb, but the organic zinc has higher manufacturing cost and low economic benefit and is difficult to apply in feed.
Disclosure of Invention
The invention aims to provide a feed additive containing zinc sulfate and a production process thereof, which solve the problems that the zinc sulfate has low bioavailability and can not replace antibiotics.
The aim of the invention can be achieved by the following technical scheme:
a production process of a feed additive containing zinc sulfate comprises the following steps:
first step, preparing base material
Mixing the essential oil coating agent, the zinc sulfate slow release agent, the vitamin C, the leucine and the bean shell powder to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, using a hydroxyethyl cellulose water solution as a binder, setting the rotating speed of the granulator to be 200-300r/min, the atomization pressure to be 0.05-0.1MPa, and the spraying speed to be 5-10mL/min, granulating to form granules;
third step, finishing
Placing the granules in a temperature condition of 40-50 ℃ for drying treatment for 2-4 hours, taking out, and sieving with a 80-100 sieve;
the essential oil coating agent is camphor essential oil coated with a cellulose layer and a guar gum layer;
the zinc sulfate slow release agent is vermiculite loaded with zinc sulfate.
Further preferably, the feed additive comprises the following raw materials in parts by weight: 5-8 parts of essential oil coating agent, 2-5 parts of zinc sulfate slow release agent, 0.5-1 part of vitamin C, 0.1-0.2 part of leucine and 4-6 parts of soybean hull powder.
Specifically, the vitamin C can enhance disease resistance of organisms, promote growth and development of muscle tissues of broiler chickens, further enable meat taste to be better, enable leucine to be an important component of protein, remarkably promote growth speed of the broiler chickens, enable bean shell powder to be rich in various nutritional components, provide comprehensive nutrition supplement for the broiler chickens, promote intestinal peristalsis of the broiler chickens, and improve digestion and absorption capacity of the broiler chickens.
Further preferably, the preparation method of the essential oil coating agent comprises the following steps:
step one, preparing guar gum solution
Adding guar gum into purified water, and stirring at 40-50deg.C to form uniform solution, namely guar gum solution;
step two, preparing essential oil liquid drop mixed solution
Adding camphor essence oil into guar gum solution, heating to 50-60deg.C, setting stirring speed at 3000-3500r/min, and stirring at high speed for 3-6min to obtain essential oil liquid mixture;
step three, preparing the essential oil coating agent
Mixing cationic cellulose with purified water to form cationic cellulose solution, dripping the cationic cellulose solution into essential oil liquid dripping mixed solution at 40-50 ℃, setting stirring speed to 3500-4000r/min after finishing the addition, stirring and mixing for 5-10min, using cellulose microporous filter membrane to carry out suction filtration on the mixed solution, and freeze-drying the separated material to obtain the essential oil coating agent.
Specifically, the camphor essential oil is dispersed into small oil drops under high-speed shearing, the essential oil drops coated with guar gum are formed under the emulsification of guar gum, the guar gum is negatively charged, so that electrostatic mutual exclusion can be generated on the essential oil drops, the oil drops are stably existing in mixed liquid to form essential oil drop mixed liquid, cationic cellulose is positively charged, electrostatic adsorption can be generated with guar gum under the electrostatic action, self-assembly is completed, and finally, the cationic cellulose layer is coated on the outer side of the essential oil drops, so that the double-layer coated essential oil coating agent is formed.
Further preferably, in the first step, the mass fraction of the guar gum solution is 15-20%.
Further preferably, in the third step, the volume ratio of the camphor essential oil to the guar gum solution is 2-3:1.
Further preferably, in the third step, the mass fraction of the cationic cellulose solution is 20-30%.
Further preferably, the preparation method of the zinc sulfate slow release agent comprises the following steps:
step A, preparing activated vermiculite
Adding vermiculite into sulfuric acid solution with the concentration of 2.5mol/L according to the solid-liquid ratio of 1:15-20, starting heating, raising the temperature to 80-90 ℃, controlling the stirring speed to 500-1000r/min, stirring for 2-4h, filtering out solid materials, washing with purified water until the pH value is 5-6, and then performing vacuum drying to obtain activated vermiculite;
step B, preparing zinc sulfate slow release agent
Adding activated vermiculite into zinc sulfate solution according to the solid-liquid ratio of 1:10-15, stirring and mixing for 1-2 hours at room temperature under the stirring rate of 1000-1500r/min, filtering and separating out solid materials, and drying in vacuum to obtain the zinc sulfate slow-release agent.
Specifically, sulfuric acid is used for activating vermiculite, so that impurities in the pores of the vermiculite are released by acidolysis, the pores are fully exposed to form activated vermiculite, zinc sulfate can be adsorbed into the pores of the vermiculite under the condition of high-speed stirring, and the zinc sulfate can be stored in the pores of the vermiculite after vacuum drying, so that the zinc sulfate slow-release agent is finally formed.
Further preferably, in the step B, the concentration of the zinc sulfate solution is 1-2mol/L.
Further preferably, the mass fraction of the hydroxyethyl cellulose aqueous solution is 10-15%.
A feed additive containing zinc sulfate is prepared by the production process.
The invention has the beneficial effects that:
1) The zinc sulfate slow release agent prepared by the method has stronger adsorptivity, can be adsorbed on the surface of the intestinal tract, and further slowly releases zinc ions in the environment of the digestive tract of broiler chickens, so that the effect of slowly releasing zinc at the target part of the intestinal tract is achieved, and the utilization rate of the zinc ions is further effectively improved. After zinc is released, the growth of harmful bacteria in the intestinal tract can be effectively inhibited, the cell proliferation and the synthesis of protein are promoted, the intestinal tract health is effectively protected, alkaline substances such as ammonia in the intestinal tract can be adsorbed after vermiculite is desorbed, the pH value in the intestinal tract is reduced, the propagation of beneficial bacteria such as lactobacillus is more facilitated, and the production performance of broiler chickens is effectively improved.
2) According to the invention, the cationic cellulose and guar gum are used as coating agents to coat the camphor essential oil, so that the essential oil coating agent is prepared, and the problem that the camphor essential oil is easy to volatilize when being directly added into feed can be avoided. By utilizing the unique antibacterial effect of the cationic cellulose, the feed additive has the mildew-proof and corrosion-proof effects without adding a preservative. The cationic cellulose gradually dissociates under the condition of low pH value at the tail part, the guar gum layer on the inner side is exposed, the guar gum has water solubility, and can be degraded by bacteria at a colon target part to release the camphor essential oil, on one hand, the camphor essential oil acts on a direct gastrointestinal target part, so that the ecological environment in the stomach and intestine can be improved, the immunity of broilers is enhanced, and in addition, the camphor essential oil can promote the absorption of nutrients such as zinc released by a zinc sulfate slow-release agent, and further has a synergistic effect with the zinc sulfate slow-release agent, so that the production performance of broilers is further improved.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 5 parts of essential oil coating agent, 2 parts of zinc sulfate slow release agent, 0.5 part of vitamin C, 0.1 part of leucine and 4 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
Mixing the essential oil coating agent, the zinc sulfate slow release agent, the vitamin C, the leucine and the bean shell powder to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 200-r/min, the atomization pressure to be 0.05MPa and the liquid spraying speed to be 5mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 40 ℃ for drying treatment for 4 hours, taking out, and sieving with a 100-sieve.
The preparation method of the essential oil coating agent comprises the following steps:
step one, preparing guar gum solution
Adding guar gum into purified water, and stirring at 40 ℃ to form a uniform solution, so as to prepare a guar gum solution with the mass fraction of 15%;
step two, preparing essential oil liquid drop mixed solution
Adding 10mL of camphor essence oil into guar gum solution, heating to 55deg.C, setting stirring speed to 3500r/min, and stirring at high speed for 4min to form essential oil liquid drop mixture;
step three, preparing the essential oil coating agent
Mixing cationic cellulose with purified water to form cationic cellulose solution with the mass fraction of 25%, dropwise adding 15mL of the cationic cellulose solution into 35mL of essential oil liquid drop mixed solution at the temperature of 45 ℃, setting the stirring rate to 4000r/min after adding, stirring and mixing for 6min, carrying out suction filtration on the mixed solution by using a cellulose microporous filter membrane, and freeze-drying the separated material to obtain the essential oil coating agent.
The preparation method of the zinc sulfate slow release agent comprises the following steps:
step A, preparing activated vermiculite
Adding 5g of vermiculite into 80mL of sulfuric acid solution with the concentration of 2.5mol/L, starting heating, heating to 90 ℃, controlling the stirring speed to be 800r/min, stirring for 3 hours, filtering out solid materials, washing with purified water to pH value of 6, and then drying in vacuum to obtain activated vermiculite;
step B, preparing zinc sulfate slow release agent
Adding 2g of activated vermiculite into 25mL of zinc sulfate solution with the concentration of 1.5mol/L, stirring and mixing for 2 hours at the room temperature under the stirring rate of 1500r/min, filtering and separating out solid materials, and drying in vacuum to obtain the zinc sulfate slow release agent.
Example 2
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 6 parts of essential oil coating agent prepared in the embodiment 1 of the invention, 4 parts of zinc sulfate slow release agent prepared in the embodiment 1 of the invention, 0.6 part of vitamin C, 0.1 part of leucine and 5 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
The essential oil coating agent prepared in the embodiment 1 of the invention, the zinc sulfate slow release agent prepared in the embodiment 1 of the invention, vitamin C, leucine and bean shell powder are stirred and mixed to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 250r/min, the atomization pressure to be 0.1MPa and the liquid spraying speed to be 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 45 ℃ for drying treatment for 3 hours, taking out, and sieving with a 100-sieve.
Example 3
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 8 parts of essential oil coating agent prepared in the embodiment 1 of the invention, 5 parts of zinc sulfate slow release agent prepared in the embodiment 1 of the invention, 1 part of vitamin C, 0.2 part of leucine and 6 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
The essential oil coating agent prepared in the embodiment 1 of the invention, the zinc sulfate slow release agent prepared in the embodiment 1 of the invention, vitamin C, leucine and bean shell powder are stirred and mixed to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to 300r/min, the atomization pressure to 0.1MPa and the spray speed to 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 50 ℃ for drying treatment for 2 hours, taking out, and sieving with a 100-sieve.
Comparative example 1
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 6 parts of camphor essential oil, 4 parts of zinc sulfate slow release agent prepared in the embodiment 1 of the invention, 0.6 part of vitamin C, 0.1 part of leucine and 5 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
Mixing the camphor essential oil, the zinc sulfate slow release agent prepared in the embodiment 1 of the invention, vitamin C, leucine and bean hull powder under stirring to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 250r/min, the atomization pressure to be 0.1MPa and the liquid spraying speed to be 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 45 ℃ for drying treatment for 3 hours, taking out, and sieving with a 100-sieve.
Comparative example 2
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 4 parts of zinc sulfate slow release agent prepared in the embodiment 1 of the invention, 0.6 part of vitamin C, 0.1 part of leucine and 5 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
The zinc sulfate slow release agent, vitamin C, leucine and bean hull powder prepared in the embodiment 1 of the invention are stirred and mixed to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 250r/min, the atomization pressure to be 0.1MPa and the liquid spraying speed to be 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 45 ℃ for drying treatment for 3 hours, taking out, and sieving with a 100-sieve.
Comparative example 3
The feed additive containing zinc sulfate comprises the following raw materials in parts by weight: 6 parts of essential oil coating agent prepared in the embodiment 1 of the invention, 4 parts of zinc sulfate, 0.6 part of vitamin C, 0.1 part of leucine and 5 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
The essential oil coating agent prepared in the embodiment 1 of the invention, zinc sulfate, vitamin C, leucine and bean hull powder are stirred and mixed to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 250r/min, the atomization pressure to be 0.1MPa and the liquid spraying speed to be 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 45 ℃ for drying treatment for 3 hours, taking out, and sieving with a 100-sieve.
Comparative example 4
A feed additive comprises the following raw materials in parts by weight: 6 parts of essential oil coating agent prepared in the embodiment 1 of the invention, 0.6 part of vitamin C, 0.1 part of leucine and 5 parts of bean shell powder;
the preparation method of the feed additive comprises the following steps:
first step, preparing base material
The essential oil coating agent prepared in the embodiment 1 of the invention, vitamin C, leucine and bean hull powder are stirred and mixed to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, granulating with 12% hydroxyethyl cellulose water solution as a binder, setting the rotation speed of the granulator to be 250r/min, the atomization pressure to be 0.1MPa and the liquid spraying speed to be 10mL/min, and forming granules;
third step, finishing
And (3) placing the granules in a temperature condition of 45 ℃ for drying treatment for 3 hours, taking out, and sieving with a 100-sieve.
Broiler production performance test
Randomly selecting 120 healthy 1-day-old AA broilers, randomly dividing the AA broilers into 8 groups, namely an example 1-an example 3 group, a comparative example 1-a comparative example 4 group and a control experiment group, wherein 15 AA broilers in the example 1-the example 3 and the comparative example 4 groups are fed by using a basic ration plus 0.5wt% of feed additives prepared in each group, the control experiment group is fed by using the same basic ration, the basic ration is prepared by referring to the nutrition requirements of American NRC (1994) broilers, all the experiment AA broilers are fed by adopting three-layer cages, fed at eight early days and five afternoons each day, fed freely and drunk, stopping feeding for 12 hours after the 21 st day feeding, recording the average weight gain and average daily feed intake of the broilers, and calculating the feed weight ratio;
after the recording is finished, selecting an AA broiler chicken with the body weight closest to the average value, taking blood from jugular vein to kill, performing slaughter experiments, dissecting chicken abdominal cavity, separating duodenum, intercepting a section of intestine with the middle section of about 2cm, cleaning by using PBS buffer solution, removing surrounding adipose tissue, dehydrating, transparent, slicing, sticking, hematoxylin-eosin staining, sealing, observing the villus height and the crypt depth of each section of intestine by using an optical microscope, calculating the ratio of the villus height to the crypt depth, and testing the following table:
the analysis and test results show that the production performance of the broiler chickens fed by the feed additive prepared in the embodiment 1-3 of the invention and the basic ration is obviously better than that of the broiler chickens fed by the basic ration. The Cinnamomum camphora essential oil is directly added into the feed additive prepared in comparative example 1, and the target part release cannot be achieved, so that the productivity of the broiler chickens is poor, and the productivity of the broiler chickens is poorer because the Cinnamomum camphora essential oil is not added in comparative example 2. The feed additive prepared by directly adding zinc sulfate in comparative example 3 has lower absorption rate of zinc, so that the productivity of broiler chickens is slightly poor, and the feed additive prepared in comparative example 4 has obviously poorer productivity because zinc sulfate is not added.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (10)
1. The production process of the feed additive containing zinc sulfate is characterized by comprising the following steps of:
first step, preparing base material
Mixing the essential oil coating agent, the zinc sulfate slow release agent, the vitamin C, the leucine and the bean shell powder to form a solid base material;
second step, preparing granules
Placing the solid base material into a granulator, using a hydroxyethyl cellulose water solution as a binder, setting the rotating speed of the granulator to be 200-300r/min, the atomization pressure to be 0.05-0.1MPa, and the spraying speed to be 5-10mL/min, granulating to form granules;
third step, finishing
Placing the granules in a temperature condition of 40-50 ℃ for drying treatment for 2-4 hours, taking out, and sieving with a 80-100 sieve;
the essential oil coating agent is camphor essential oil coated with a cellulose layer and a guar gum layer;
the zinc sulfate slow release agent is vermiculite loaded with zinc sulfate.
2. The production process of the zinc sulfate-containing feed additive according to claim 1, wherein the feed additive comprises the following raw materials in parts by weight: 5-8 parts of essential oil coating agent, 2-5 parts of zinc sulfate slow release agent, 0.5-1 part of vitamin C, 0.1-0.2 part of leucine and 4-6 parts of soybean hull powder.
3. The process for producing a zinc sulfate-containing feed additive according to any one of claims 1 to 2, wherein the process for producing the essential oil coating agent comprises the steps of:
step one, preparing guar gum solution
Adding guar gum into purified water, and stirring at 40-50deg.C to form uniform solution, namely guar gum solution;
step two, preparing essential oil liquid drop mixed solution
Adding camphor essence oil into guar gum solution, heating to 50-60deg.C, setting stirring speed at 3000-3500r/min, and stirring at high speed for 3-6min to obtain essential oil liquid mixture;
step three, preparing the essential oil coating agent
Mixing cationic cellulose with purified water to form cationic cellulose solution, dripping the cationic cellulose solution into essential oil liquid dripping mixed solution at 40-50 ℃, setting stirring speed to 3500-4000r/min after finishing the addition, stirring and mixing for 5-10min, using cellulose microporous filter membrane to carry out suction filtration on the mixed solution, and freeze-drying the separated material to obtain the essential oil coating agent.
4. A process for the production of a zinc sulphate-containing feed additive according to claim 3 wherein in step one the mass fraction of guar gum solution is 15-20%.
5. A process for producing a zinc sulfate-containing feed additive according to claim 3, wherein in step three, the volume ratio of the camphor essential oil to the guar gum solution is 2-3:1.
6. A process for producing a zinc sulfate-containing feed additive according to claim 3, wherein in the third step, the mass fraction of the cationic cellulose solution is 20-30%.
7. The process for producing a zinc sulfate-containing feed additive according to any one of claims 1 to 2, wherein the preparation method of the zinc sulfate slow release agent comprises the following steps:
step A, preparing activated vermiculite
Adding vermiculite into sulfuric acid solution with the concentration of 2.5mol/L according to the solid-liquid ratio of 1:15-20, starting heating, raising the temperature to 80-90 ℃, controlling the stirring speed to 500-1000r/min, stirring for 2-4h, filtering out solid materials, washing with purified water until the pH value is 5-6, and then performing vacuum drying to obtain activated vermiculite;
step B, preparing zinc sulfate slow release agent
Adding activated vermiculite into zinc sulfate solution according to the solid-liquid ratio of 1:10-15, stirring and mixing for 1-2 hours at room temperature under the stirring rate of 1000-1500r/min, filtering and separating out solid materials, and drying in vacuum to obtain the zinc sulfate slow-release agent.
8. The process for producing a zinc sulfate-containing feed additive according to claim 7, wherein in the step B, the concentration of the zinc sulfate solution is 1 to 2mol/L.
9. The process for producing a zinc sulfate-containing feed additive according to claim 1, wherein in the second step, the mass fraction of the aqueous solution of hydroxyethyl cellulose is 10 to 15%.
10. A feed additive containing zinc sulfate, which is characterized by being prepared by the production process as claimed in claim 1.
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