JP2021141849A - Method for producing vitamin c, and vitamin c - Google Patents

Abstract

To provide, in order to surely administer a vitamin C raw material to animals: a method for producing vitamin C, which can surely and sufficiently coat a surface of a vitamin C raw material with a coating agent; and vitamin C which is coated surely and sufficiently.SOLUTION: Provided is a method for producing vitamin C by coating a surface of a vitamin C raw material, comprising: a raw material weighing step S1; a dissolution step S2; a coating agent weighing step S3; a first coating step S4; a first cooling step S5; a second coating step S6; a second cooling step S7; a third coating step S8; and a third coating step S9, where a stirrer is used in the first coating step S4, the second coating step S6, and the third coating step S8.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for producing vitamin C and vitamin C, which are produced by coating the surface of a vitamin C raw material.

By administering vitamin C to animals such as farmed fish and livestock, the breeding of those animals can be promoted and the meat quality can be improved.

Since vitamin C is water-soluble, if vitamin C is directly administered to farmed fish or livestock, it dissolves in a water tank or elutes in rainy weather, and vitamin C cannot be sufficiently administered to farmed fish or livestock. Therefore, the surface of vitamin C is coated with a poorly water-soluble substance.

For example, in Patent Document 1, the surface of vitamin C is coated with hydrogenated oil, wax, long-chain carboxylic acid, long-chain alcohol, or the like.

Further, in Patent Document 2, it is coated with a fatty appetite promoting substance.

Japanese Unexamined Patent Publication No. 1-299653 Japanese Unexamined Patent Publication No. 2016-27810

However, with the coating methods of Patent Document 1 and Patent Document 2, coating with a sufficient film thickness cannot be performed, and the vitamin C raw material may not be reliably administered to the animal.

Therefore, an object of the present invention is a method for producing vitamin C, which can reliably and sufficiently coat the surface of the vitamin C raw material with a coating agent, and a reliable and sufficiently coated vitamin C raw material in order to reliably administer the vitamin C raw material to animals. The purpose is to provide vitamin C.

The method for producing vitamin C according to one aspect of the present invention is a method for producing vitamin C by coating the surface of the vitamin C raw material, and the vitamin C raw material, the curing oil, and the glycerin fatty acid ester are used, respectively. The raw material weighing step to be weighed, the dissolving step of heating and dissolving the cured oil and the glycerin fatty acid ester weighed in the raw material weighing step, and the dissolved cured oil and the glycerin fatty acid ester are further weighed and coated. First, the vitamin C raw material weighed in the coating agent weighing step, the vitamin C raw material weighed in the raw material weighing step, and the heated coating agent obtained in the coating agent weighing step are mixed while stirring using a stirrer. A coating step, a first cooling step of cooling the mixture obtained in the first coating step to obtain a first cooled product, and a coating agent obtained and heated in the coating agent weighing step are applied to the first cooled product. Further, in addition, a second coating step of mixing while stirring using a stirrer, a second cooling step of cooling the mixture obtained in the second coating step to obtain a second cooled product, and the second cooled product. A third coating step of further adding the coating agent obtained in the coating agent weighing step and mixing while stirring using a stirrer, and a third coating step of cooling the mixture obtained in the third coating step. It is characterized in that a coated vitamin C is obtained by having a third cooling step of obtaining a cooled product.

In this way, the surface of the vitamin C raw material can be reliably and sufficiently coated with the coating agent.

At this time, in one aspect of the present invention, the stirrer has one or a plurality of stirring blades, a rotating shaft extending from the stirring blades in the direction of the rotation axis, and a groove portion to which a rotating belt can be attached to the end of the rotating shaft. It may be provided with a belt mounting portion having the above.

In this way, the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

At this time, in one aspect of the present invention, after the third cooling step, a sorting step of sorting the third cooled product to a predetermined particle size and the third cooled product that did not satisfy the predetermined particle size in the sorting step. May further have a regeneration step of mixing and regenerating while stirring and heating again using a stirrer without adding a coating agent.

By doing so, the defect rate can be reduced, so that the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

At this time, in one aspect of the present invention, after the regeneration step, cooling is performed and the sorting step is performed again, and the cooled product that does not meet the predetermined particle size is stirred again using a stirrer without adding a coating agent. And it may be carried out a re-generation step of mixing and regenerating while heating.

By doing so, the defect rate can be further reduced, so that the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

At this time, in one aspect of the present invention, in the sorting step, 20 mesh may be used to sort the third cooled product to a predetermined particle size.

In this way, vitamin C having a uniform particle size can be produced.

At this time, in one aspect of the present invention, the temperature of the heated coating agent added in the first coating step is 150 ° C. to 190 ° C., and the temperature of the heated coating agent added in the second coating step is The temperature is 120 ° C. to 160 ° C., and the temperature of the heated coating agent added in the third coating step may be 100 ° C. to 140 ° C.

By doing so, the redissolution of the coating agent can be minimized, and the surface of the vitamin C raw material can be coated reliably and sufficiently more efficiently.

At this time, in one aspect of the present invention, the vitamin C raw material may be L-ascorbic acid.

In this way, the vitamin C raw material is optimized, the breeding of animals is further promoted, and the meat quality can be improved.

At this time, in another aspect of the present invention, the surface of the vitamin C raw material is coated with a coating agent, and the surface of the vitamin C raw material is the first coat layer, the second coat layer and the third coat. It is coated with a three-layer coating agent, which is characterized by being a cured oil and a glycerin fatty acid ester.

In this way, the surface of the vitamin C raw material can be reliably and sufficiently coated with the coating agent.

According to the present invention, it is possible to provide a method for producing vitamin C in which the surface of a vitamin C raw material can be reliably and sufficiently coated with a coating agent, and vitamin C in which the surface of the vitamin C raw material is reliably and sufficiently coated.

FIG. 1 is a schematic view showing a process of a method for producing vitamin C according to an embodiment of the present invention. FIG. 2 is a diagram showing an outline of a stirrer used in the method for producing vitamin C according to an embodiment of the present invention. FIG. 3 is a plan view of a stirrer used in the method for producing vitamin C according to an embodiment of the present invention. FIG. 4 is a schematic view of stirring and mixing using the stirrer in the first coating step, the second coating step, and the third coating step. FIG. 5 is a cross-sectional view of vitamin C according to an embodiment of the present invention.

As a result of diligent studies to solve the above problems, the present inventor mixed the vitamin C raw material and the heated coating agent while stirring using a stirrer, and repeated cooling three times. The present invention has been completed based on the finding that the surface of a vitamin C raw material can be reliably and sufficiently coated with a coating agent. Further, the present invention has been completed based on the finding that the surface of the vitamin C raw material can be coated more efficiently and sufficiently by using the stirrer used in the method for producing vitamin C according to the embodiment of the present invention. It was done. Hereinafter, preferred embodiments of the present invention will be described.

The present embodiment described below does not unreasonably limit the content of the present invention described in the claims, and can be modified without departing from the gist of the present invention. Moreover, not all of the configurations described in the present embodiment are indispensable as the means for solving the present invention. The method for producing vitamin C and the vitamin C according to the embodiment of the present invention will be described in the following order.
1. 1. Vitamin C production method 1-1. Raw material weighing process 1-2. Melting step 1-3. Coating agent weighing process 1-4. First coating process 1-5. 1st cooling step 1-6. Second coating process 1-7. Second cooling step 1-8. Third coating process 1-9. Third cooling step 1-10. Sorting process 1-11. Regeneration process 1-12. Regeneration process 2. Vitamin C

<1. Vitamin C manufacturing method>
The method for producing vitamin C according to an embodiment of the present invention is to coat the surface of a vitamin C raw material with a coating agent. Further, as shown in FIG. 1, the method for producing vitamin C according to one embodiment of the present invention includes at least a raw material weighing step S1, a dissolving step S2, a coating agent weighing step S3, a first coating step S4, and a first cooling. It has a step S5, a second coating step S6, a second cooling step S7, a third coating step S8, and a third cooling step S9. In addition, it may have a sorting step S10, a regeneration step S11, and a regeneration step S12. Each step will be described in detail below.

[1-1. Raw material weighing process S1]
In the raw material weighing step S1, the vitamin C raw material, the hydrogenated oil, and the glycerin fatty acid ester are weighed, respectively. Weighing may be performed by weighing the amount obtained through the following steps. Vitamin C is L-ascorbic acid. Examples of the hydrogenated oil include artificial fat, soybean hydrogenated oil, rapeseed hydrogenated oil, whale hydrogenated oil, and fish hydrogenated oil produced by combining hydrogen with fatty oil, but soybean hydrogenated oil is preferable. Hydrogenated oil is optimized, animal breeding is promoted, and meat quality can be improved.

[1-2. Melting step S2]
The dissolution step S2 heats and dissolves the hydrogenated oil and the glycerin fatty acid ester weighed in the raw material weighing step S1. The melting temperature may be the temperature of the heated coating agent used in the first coating step S4, the second coating step S6, and the third coating step S8, which will be described later, and specifically, gas heating at 100 ° C. to 190 ° C. It may be heated using a kettle. If the temperature is lower than 100 ° C., the hydrogenated oil may be cured. On the other hand, if the temperature exceeds 190 ° C., vitamin C may be decomposed when the hydrogenated oil heated in the next step and the glycerin fatty acid ester are added. The coating agent contains at least hydrogenated oil and glycerin fatty acid ester.

[1-3. Coating agent weighing step S3]
In the coating agent weighing step S3, the dissolved hydrogenated oil and the glycerin fatty acid ester are further weighed to obtain a dissolved coating agent. The weighing is the amount required for coating in the first coating step S4, the second coating step S6, and the third coating step S8. Further, since the dissolved coating agent is used in the first coating step S4, the second coating step S6, and the third coating step S8, the coating agent weighing step is performed so that the temperature of the dissolved coating agent added in each step is reached. It is preferable to carry out S3 while also heating.

[1-4. First coating step S4]
The vitamin C raw material weighed in the raw material weighing step S1 and the dissolved coating agent obtained in the coating agent weighing step S3 are mixed with stirring using the stirrer 10. That is, in the first coating step S4, the surface of the vitamin C raw material is first coated. Further, in the method for producing vitamin C according to the embodiment of the present invention, as will be described later, the surface of the vitamin C raw material is coated three times with a coating agent which is a mixture of a curing oil and a glycerin fatty acid ester. The surface of the raw material can be reliably and sufficiently coated. The amount of the dissolved coating agent required in the first coating step S4 is weighed.

The temperature of the dissolved coating agent added in the first coating step S4 is preferably 150 ° C. to 190 ° C. It is preferable that the temperature of the dissolved coating agent is lowered as it goes to the first coating step S4, the second coating step S6, and the third coating step S8. In this way, the amount of redissolved coating agent can be minimized.

The temperature of the dissolved coating agent is preferably 190 ° C. or lower, but if it exceeds 190 ° C., vitamin C may be decomposed.

In the first coating step S4, the individual vitamin C raw material and the dissolved liquid coated coating agent are stirred using the stirrer 10. In the first coating step S4, since heating is not performed, the temperature of the dissolved coating agent of the liquid dissolved during stirring drops, and the hydrogenated oil and glycerin fatty acid ester which are the dissolved coating agents covering the surface of the vitamin C raw material are covered. Solidifies. In this way, in the first coating step S4, the surface of the vitamin C raw material is coated with a coating agent.

Here, as the stirrer used in the first coating step S4, it is preferable to use the stirrer 10 shown in FIG. That is, in the stirrer 10, a single stirring blade 11 or a plurality of stirring blades 12, a rotating shaft 13 extending from the stirring blades 11 and 12 in the rotation axis direction, and a rotating belt 16 are attached to the end of the rotating shaft 13. A belt mounting portion 15 having a possible groove portion 14 is provided. The belt mounting portion 15 has a groove portion 14 and is integrated with the rotating shaft 13. Further, the number of groove portions 14 may be one or more, but it is preferable to provide a plurality of groove portions 14 in order to rotate stably. By using the stirrer 10, it is possible to efficiently stir and reduce the defective rate, so that the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

Further, FIG. 3 is a plan view of the stirrer 10 used in the method for producing vitamin C according to the embodiment of the present invention. As described above, it is preferable to provide a single stirring blade 11 as shown in FIG. 3 (A) and a plurality of stirring blades 11 as shown in FIG. 3 (B).

FIG. 4 is a schematic view of stirring and mixing using the stirrer 10 in the first coating step S4, the second coating step S6 and the third coating step S8 described later. In this way, in the first coating step S4, the second coating step S6, and the third coating step S8, the vitamin C raw material weighed in the raw material weighing step S1 and the dissolved coating agent obtained in the coating agent weighing step S3. And are mixed by stirring using the stirrer 10. As shown in FIG. 4, the stirrer 10 may be rotated by attaching a rotating belt 15 to the groove 14 and connecting it to the motor 17. From the viewpoint of improving the stirring efficiency, it is preferable to rotate the tank 20 itself such as the rotary pan shown in FIG. Further, it is preferable to stir until the powder does not adhere around the tank 20 such as a rotary pan. Less agitation may result in coarser coated vitamin C particles.

[1-5. First cooling step S5]
In the first cooling step S5, the mixture obtained in the first coating step S4 is cooled to obtain a first cooled product. Cooling is preferably 50 ° C. or lower. By setting the temperature to 50 ° C. or lower, the amount of redissolved of the coating agent in the second coating step S6 can be minimized.

[1-6. Second coating step S6]
In the second coating step S6, the dissolved coating agent obtained in the coating agent weighing step S3 is further added to the first cooled product, and the mixture is mixed while stirring using the stirrer 10. In the second coating step S6, the surface of the mixture obtained by coating the surface of the vitamin C raw material with the coating agent in the first coating step S4 is further coated with the coating agent. That is, when the second coating step S6 is completed, the coating layer becomes two layers. The amount of the dissolved coating agent added here is weighed in the amount required in the second coating step S6.

The stirrer 10 shown in FIG. 2 and the like is also used as the stirrer used in the second coating step S6. Then, as shown in FIG. 4, the mixture is mixed with stirring.

The temperature of the dissolved coating agent added in the second coating step S6 is preferably 120 ° C. to 160 ° C. By doing so, it is possible to prevent the coating agent from being redissolved.

[1-7. Second cooling step S7]
In the second cooling step S7, the mixture obtained in the second coating step S6 is cooled to obtain a second cooled product. Cooling is preferably 50 ° C. or lower. By setting the temperature to 50 ° C. or lower, the amount of redissolved of the coating agent in the third coating step S8 can be minimized.

[1-8. Third coating step S8]
In the third coating step S8, the dissolved coating agent obtained in the coating agent weighing step S3 is further added to the second cooled product, and the mixture is mixed while stirring using the stirrer 10. In the third coating step S8, the surface of the mixture obtained in the second coating step S6 is further coated with a coating agent. That is, when the third coating step S8 is completed, the coating layer becomes three layers. The amount of the dissolved coating agent added here is weighed in the amount required in the third coating step S8.

The temperature of the heated dissolved coating agent added in the third coating step S8 is preferably 100 ° C. to 140 ° C. By doing so, it is possible to prevent the coating agent from being redissolved.

[1-9. Third cooling step S9]
In the third cooling step S9, the mixture obtained in the third coating step S8 is cooled to obtain a third cooled product. Cooling is preferably 40 ° C. or lower. The temperature of the first cooling step S5 and the second cooling step S7 was preferably 50 ° C. or lower, but the temperature of 40 ° C. or lower is preferable because no further coating is performed after the third cooling step S9.

Further, it is preferable to add silicon dioxide to the third cooled product obtained in the third cooling step S9. By doing so, it becomes difficult for the particles of the third cooled product to bond with each other, the generation of coarse particles can be prevented, and sorting becomes easy in the sorting step S10 described later.

By going through the above steps, it is possible to provide a method for producing vitamin C, which can reliably and sufficiently coat the surface of the vitamin C raw material with a coating agent. In addition to the above steps, it is preferable to have the following steps.

[1-10. Sorting step S10]
As shown in FIG. 1, it is preferable to have a sorting step S10 for sorting the third cooled product to a predetermined particle size after the third cooling step S9. It is preferable to use 20 mesh for sorting. In this way, vitamin C having a uniform particle size can be obtained, and it becomes easy to mix with animal feed.

[1-11. Regeneration process S11]
In the regeneration step S11, the third cooled product that did not meet the predetermined particle size in the sorting step S10 is mixed and regenerated while being stirred and heated again using the stirrer 10 without adding the dissolved coating agent. The heating temperature here is set to 100 ° C. to 130 ° C. so that one layer of the coating agent can be dissolved, or the particles are bonded to each other and coarsened, and only the surface is melted so that the particles can be separated from each other. After heating for the above time, stop heating. If the temperature is raised too high, two or more layers may be melted. Further, for stirring, the stirrer 10 shown in FIG. 2 is used. After the regeneration step S11, cooling is performed and the sorting step S10 is performed.

By doing so, the defect rate can be reduced, so that the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

[1-12. Regeneration process S12]
In the regeneration step S12, after the regeneration step S11, cooling is performed and the sorting step S10 is performed again, and the cooled product that does not meet the predetermined particle size is stirred again using the stirrer 10 without adding the dissolved coating agent. Mix and regenerate while heating. The temperature is the same as that in the regeneration step S11, and the stirring device 10 shown in FIG. 2 is used for stirring.

By doing so, the defect rate can be further reduced, so that the surface of the vitamin C raw material can be coated more efficiently and sufficiently.

<4. Vitamin C>
Vitamin C100 according to an embodiment of the present invention is obtained by coating the surface of a vitamin C raw material with a coating agent. Vitamin C100 according to one embodiment of the present invention is carried out through the steps shown above, and as shown in FIG. 5, the surface of the vitamin C raw material 30 is the first coat layer 40 and the resulting product obtained. It is coated with a three-layer coating agent of a two-coat layer 50 and a third coat layer 60, and the coating agent is a mixture of a hydrogenated oil and a glycerin fatty acid ester.

As shown in FIG. 5, since the surface of the vitamin C raw material is reliably and sufficiently coated with the coating agent, the vitamin C raw material does not elute into water, and the vitamin C100 can be reliably administered to the animal.

From the above, according to the present invention, it is possible to provide a method for producing vitamin C100 in which the surface of a vitamin C raw material can be reliably and sufficiently coated with a coating agent, and a vitamin C100 in which the surface of the vitamin C raw material is reliably and sufficiently coated. Therefore, it can be reliably administered to animals and the growth of animals can be promoted.

Next, a method for producing vitamin C100 and vitamin C100 according to an embodiment of the present invention will be described in more detail with reference to Examples. The present invention is not limited to these examples.

(Example 1)
In Example 1, the raw material weighing step S1, the melting step S2, the coating agent weighing step S3, the first coating step S4, the first cooling step S5, the second coating step S6, the second cooling step S7, and the third are shown in FIG. The coating step S8 and the third cooling step S9 were performed in this order, and the sorting step S10 was performed.

In the raw material weighing step S1, 100 kg of L-ascorbic acid, 100 kg of hydrogenated oil, and 10 kg of glycerin fatty acid ester were weighed. In the dissolution step S2, the hydrogenated oil and the glycerin fatty acid ester weighed in the raw material weighing step S1 were heated and dissolved. In the coating agent weighing step S3, the dissolved hydrogenated oil and the glycerin fatty acid ester were further weighed to obtain a dissolved coating agent.

In the first coating step S4, the vitamin C raw material weighed in the raw material weighing step S1 and the dissolved coating agent (16 kg) obtained in the coating agent weighing step S3 are stirred by using the stirrer 10 shown in FIG. Mixing while mixing. The temperature of the dissolved coating agent here was 170 ° C.

In the first cooling step S5, the mixture obtained in the first coating step S4 was cooled to 50 ° C. to obtain a first cooled product.

In the second coating step S6, the dissolved coating agent (12 kg) obtained in the coating agent weighing step S3 was further added to the first cooled product, and the mixture was mixed while stirring using the stirrer 10 shown in FIG. The temperature of the dissolved coating agent here was 140 ° C.

In the second cooling step S7, the mixture obtained in the second coating step S6 was cooled to 50 ° C. to obtain a second cooled product.

In the third coating step S8, the dissolved coating agent (12 kg) obtained in the coating agent weighing step S3 was further added to the second cooled product, and the mixture was mixed while stirring using the stirrer 10 shown in FIG. The temperature of the dissolved coating agent here was 120 ° C.

In the third cooling step S9, the mixture obtained in the third coating step S8 was cooled to 40 ° C. to obtain a third cooled product.

Then, using a 20-mesh sieve, the particles were sorted to a predetermined particle size and divided into vitamin C having a size of 20 mesh or less and vitamin C having a size larger than 20 mesh.

Further, the content of L-ascorbic acid in vitamin C of 20 mesh or less obtained above wt% (L-ascorbic acid (g) / total amount (g)) and the elution rate in water for 10 minutes wt. % (Elution amount (g) / total amount (g)) was determined. At this time, when the content rate was 70 wt% or more and the elution rate wt% was 10 wt% or less, it was evaluated as ◯, and when the content rate was less than 70 wt% and the elution rate wt% was greater than 10 wt%, it was evaluated as x.

The higher the content of L-ascorbic acid, the higher the content of vitamin C, and the smaller the elution rate, the less soluble it is in water, and the more reliably it can be administered to animals.

(Example 2)
In Example 2, the temperature of the heated dissolved coating agent added in the first coating step S4 is 190 ° C., the temperature of the heated dissolved coating agent added in the second coating step S6 is 160 ° C., and the temperature of the third coating step S8 The temperature of the heated dissolved coating agent added in step 1 was set to 140 ° C. Other than that, it was the same as in Example 1.

(Example 3)
In Example 3, the temperature of the heated dissolved coating agent added in the first coating step S4 is 150 ° C., the temperature of the heated dissolved coating agent added in the second coating step S6 is 120 ° C., and the temperature of the third coating step S8 The temperature of the heated dissolved coating agent added in step 1 was set to 100 ° C. Other than that, it was the same as in Example 1.

(Example 4)
In Example 4, a regeneration step of mixing and regenerating vitamin C larger than 20 mesh of Example 1 while stirring again using a stirrer 10 without adding a dissolved coating agent and heating at 110 ° C. for 5 minutes. S11 was performed. Others were the same as in Example 1.

(Example 5)
In Example 5, after the regeneration step S11, cooling is performed and the sorting step S10 is performed again, and the cooled product that does not meet the predetermined particle size is stirred again using the stirrer 10 without adding the dissolved coating agent. A regeneration step S12 was carried out in which the mixture was mixed and regenerated while being heated at 110 ° C. for 5 minutes. Others were the same as in Example 1.

The above conditions and results are shown in Table 1.

As shown in Table 1, in Examples 1 to 3, the L-ascorbic acid content wt% was 70 wt% or more, and the elution rate wt% was 10 wt% or less, which were good values. Further, also in Examples 4 and 5 in which the regeneration step S11 and the regeneration step S12 were performed, the L-ascorbic acid content rate wt% and the elution rate wt% were good values.

From the above, through the above steps, it was possible to provide a method for producing vitamin C in which the surface of the vitamin C raw material can be reliably and sufficiently coated with a coating agent, and vitamin C in which the surface of the vitamin C raw material is reliably and sufficiently coated.

Although each embodiment and each embodiment of the present invention have been described in detail as described above, those skilled in the art will be able to make many modifications that do not substantially deviate from the new matters and effects of the present invention. , Will be easy to understand. Therefore, all such modifications are included in the scope of the present invention.

For example, a term described at least once in a specification or drawing with a different term in a broader or synonymous manner may be replaced by the different term anywhere in the specification or drawing. Further, the method for producing vitamin C and the composition and operation of vitamin C are not limited to those described in each embodiment and each embodiment of the present invention, and various modifications can be carried out.

S1 raw material weighing process, S2 melting process, S3 coating agent weighing process, S4 first coating process, S5 first cooling process, S6 second coating process, S7 second cooling process, S8 third coating process, S9 third cooling process. , S10 sorting process, S11 regeneration process, S12 regeneration process,
10 stirrer, 11 (singular) stirrer, 12 (plural) stirrer, 13 rotary shaft, 14 groove, 15 belt mount, 16 rotary belt, 17 motor, 20 tanks,
100 Vitamin C,

Claims (8)

A method for producing vitamin C by coating the surface of the vitamin C raw material.
A raw material weighing step of weighing the vitamin C raw material, the hydrogenated oil, and the glycerin fatty acid ester, respectively.
A dissolution step of heating and dissolving the hydrogenated oil and the glycerin fatty acid ester weighed in the raw material weighing step, and
A coating agent weighing step of further weighing the dissolved hydrogenated oil and the glycerin fatty acid ester to obtain a dissolved coating agent.
A first coating step of mixing the vitamin C raw material weighed in the raw material weighing step and the dissolved coating agent obtained in the coating agent weighing step while stirring using a stirrer.
A first cooling step of cooling the mixture obtained in the first coating step to obtain a first cooled product, and
In the second coating step, the dissolved coating agent obtained in the coating agent weighing step is further added to the first cooled product, and the mixture is mixed while stirring using a stirrer.
A second cooling step of cooling the mixture obtained in the second coating step to obtain a second cooled product, and
In the third coating step, the dissolved coating agent obtained in the coating agent weighing step is further added to the second cooled product, and the mixture is mixed while stirring using a stirrer.
A method for producing vitamin C, which comprises a third cooling step of cooling the mixture obtained in the third coating step to obtain a third cooled product to obtain coated vitamin C. The stirrer includes one or a plurality of stirring blades, a rotating shaft extending from the stirring blade in the rotation axis direction, and a belt mounting portion having a groove portion at the end of the rotating shaft to which a rotating belt can be mounted. The method for producing vitamin C according to claim 1, which is characteristic. After the third cooling step, a sorting step of sorting the third cooled product to a predetermined particle size and
Further having a regeneration step of mixing and regenerating the third cooled product which did not satisfy the predetermined particle size in the sorting step while stirring and heating again using a stirrer without adding a dissolved coating agent. The method for producing vitamin C according to claim 1 or 2, wherein the vitamin C is produced. After the regeneration step, cooling is performed and the sorting step is performed again, and the cooled product that does not meet the predetermined particle size is mixed and regenerated while stirring and heating again using a stirrer without adding the dissolved coating agent. The method for producing vitamin C according to claim 3, wherein the regenerating step is carried out. The method for producing vitamin C according to claim 3 or 4, wherein in the sorting step, 20 meshes are used to sort the third cooled product to a predetermined particle size. The temperature of the heated dissolved coating agent added in the first coating step is 150 ° C. to 190 ° C.
The temperature of the heated dissolved coating agent added in the second coating step is 120 ° C. to 160 ° C.
The method for producing vitamin C according to any one of claims 1 to 5, wherein the temperature of the heated dissolved coating agent added in the third coating step is 100 ° C. to 140 ° C. The method for producing vitamin C according to any one of claims 1 to 6, wherein the vitamin C raw material is L-ascorbic acid. Vitamin C whose surface is coated with a coating agent.
The surface of the vitamin C raw material is coated with a three-layer coating agent of a first coat layer, a second coat layer and a third coat layer.
The coating agent is vitamin C, which is a mixture of hydrogenated oil and glycerin fatty acid ester.

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