JPH0987099A - Method for introducing other component into crystal and production of mineral salt by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for introducing other components into a crystal, capable of rapidly and efficiently introducing the other components of an arbitrary amt. into this crystal. SOLUTION: The crystal and a material contg. the components different from the constituting components of the crystal are charged into a vacuum stirrer and are stirred and mixed under a reduced pressure, for example, -700 to -750mmHg, by which the other components are dispersed into the crystal. The crystal of common salt and mineral component-contg. materials are charged into the vacuum stirrer and are stirred and mixed under -700 to -750mmHg, by which the mineral components are introduced into the crystal of the common salt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for introducing other components into crystals and a method for producing a mineral salt using the same, which does not require particularly large-scale equipment, and the ratio of other components to be introduced can be arbitrarily set. The present invention relates to a method of introducing other components into crystals, which can be adjusted, and is suitable for the production of small-quantity, multi-product products, and a method of producing a mineral salt using the same.

[0002]

2. Description of the Related Art Sodium chloride (NaCl), so-called salt, is said to be a source of life and is an important item that is indispensable for humans and other animals, and is also used as table salt. Further, salt is widely used in general industries such as synthetic rubber, dye, and soap production, soda industry for producing caustic soda and chlorine, and also in the chemical industry.

Such salt is roughly classified into rock salt which is crystallized in a rock state, sun salt which is naturally dried seawater and refined salt which is purified for food, and the salt and sun salt are combined into a natural salt. There is also a method of distinguishing the two by calling the salt and the purified salt as the chemical salt. The salt industry in Japan is
It is conducted under the monopoly system of Japan Tobacco Inc. (hereinafter simply referred to as JT), and rock salt and sun salt are imported from foreign countries through JT.

FIG. 12 is a system flow chart showing a method for producing a domestically produced purified salt (hereinafter referred to as a chemical salt) by an ion exchange membrane method, in which seawater is directly ion-exchanged by using an ion exchange membrane. This device is a pump 21 for pumping seawater.
, A seawater tank 22 for storing seawater 29 pumped up by the pump 21, an ion exchange membrane dialysis tank 23, a brine tank 24, and a vacuum evaporator 2 which are sequentially arranged downstream of the seawater tank 22.
5, centrifuges 26 and 27 and centrifuge 2
7 and a drier 28 provided in the downstream thereof. The seawater 29 is pumped up by the pump 21 and stored in the seawater tank 22, and then flows into the ion-exchange membrane dialysis tank 23 in which a membrane that allows only cations and a membrane that allows only anions are alternately arranged, and salt Brine 3 with high concentration
It becomes 0, and it flows into the downstream brackish water tank 24. Next, the brackish water 30 flows into the vacuum evaporator 25, where it is further concentrated, and then flows into the downstream centrifugal separator 26, where it is separated into solid and liquid, and recovered as, for example, normal salt 31. On the other hand, the salt separated into solid and liquid by the centrifuge 27 is used as the downstream dryer 2.
It is recovered as salt 32 through 8.

The chemical salt thus purified has a high sodium chloride concentration of, for example, 99.6%, and has a reduced content of mineral components as compared with natural salt.
Therefore, an artificial natural salt containing a mineral component substantially similar to the natural salt is prepared by adding a mineral component to this. On the other hand, recently, for salt, which has a small demand nationwide or only regional demand, a private processor dissolves natural salt imported from foreign countries through JT into pseudo seawater. Then, the so-called special salt obtained by adding an additive to it, then concentrating it by the sun or heating to recrystallize it came to the attention.

FIG. 11 is a system flow chart showing a method for producing artificial natural salt or special salt. In the figure, a chemical salt or a natural salt, which is a raw material salt, is dissolved in a large amount of water to become pseudo seawater, and the pseudo seawater contains so-called bittern ingredients such as potassium chloride, magnesium chloride, calcium chloride, or spice seasoning. Add the special ingredients of
By drying in the sun or by heating and recrystallization, a special salt such as an artificial natural salt or a garlic salt containing substantially the same mineral components as the natural salt is produced.

According to the method of using a chemical salt (JT chemical salt) as a raw material salt, once an ion exchange membrane is used, for example, impurities,
Since contaminants such as mercury and PCB are removed, natural salt or special salt having stable product quality and high safety can be obtained.

[0008]

However, the above-mentioned method for producing artificial natural salt or special salt by sun drying or heat drying requires a vast land for drying or a large amount of heat and requires a large processing capacity. Since it is large, it is difficult to finely adjust the additive components, and it takes a long time for the product to be completed, resulting in a high cost, and it has never been an economically advantageous method. Further, when rock salt or sun salt is used as the raw material salt, there is a problem that contaminants, contaminants and the like contained in the raw material salt are mixed into the product as they are.

The object of the present invention is to solve the above-mentioned problems of the prior art, and to introduce an arbitrary amount of other components into the crystal efficiently in a short time. Another object of the present invention is to provide a method for introducing another component and a method for producing a mineral salt using the method.

[0010]

In order to achieve the above object, the present inventor has used a salt crystal and a mineral component-containing substance as a substance containing a crystal and a component different from the crystal, and the salt crystal is used. As a result of diligent research on a method of introducing a mineral component into the crystal, salt crystals and a substance containing a mineral component are put into a vacuum stirrer, and the mineral component is impregnated in the salt crystal by stirring and mixing under reduced pressure. As a result, they have found that they are introduced and uniformly dispersed, and have reached the present invention.

That is, the invention claimed in this application is as follows. (1) The crystal and a substance containing a component different from the constituent components of the crystal are charged into a vacuum stirrer, stirred under reduced pressure and mixed to disperse the other component in the crystal. Method of introducing other components into crystals. (2) The method for introducing another component into the crystal as described in (1) above, which comprises stirring and mixing under a reduced pressure of −700 mmHg or less. (3) During stirring and mixing, the pressure in the vacuum stirrer is once opened to the atmospheric pressure to atmospheric pressure to -50 mmHg, and then reduced again to -700 mmHg or less. Method of introducing other components into crystals.

(4) Crystals of salt and a substance containing a mineral component are put into a vacuum stirrer, and -700 to -750 mmH.
A method for producing a mineral salt, which comprises stirring and mixing under reduced pressure of g to disperse the mineral component in the salt crystals. (5) The method for producing a mineral salt according to (4), wherein the mineral component-containing substance is at least one of potassium chloride, magnesium chloride and calcium chloride. (6) The method for producing a mineral salt as described in (4) or (5) above, wherein a chemical salt is used as the salt.

In the present invention, the mechanism by which the mineral component is introduced so as to be impregnated in the salt crystals and uniformly dispersed is not necessarily clear, but by dehydration under reduced pressure, the water in the salt crystals evaporates, It is considered that a large number of pores are uniformly generated in the salt crystal and introduced so that the pores are impregnated with a mineral component which is another component. In the present invention, as the crystal component, for example, salt is used, and as the salt, not only chemical salt but also rock salt and sun salt imported from foreign countries can be used, but in order to enhance the safety as a product, It is preferable to use a salt.
In the present invention, the chemical salt means a purified salt obtained by directly ion-exchanging seawater using an ion-exchange membrane.

In the present invention, examples of the component different from the crystal component include a so-called mineral component added to sodium chloride. Examples of the mineral component include potassium (K), magnesium (Mg), calcium (Ca), and the like. Examples of substances containing these mineral components include potassium chloride, magnesium chloride, calcium chloride, and other mineral components. Examples of the contained carbonates and the like.

In the present invention, the pressure inside the vacuum stirrer during stirring and mixing is -700 mmHg or less, preferably -70.
0 to -750 mmHg, more preferably -730 to -7
It is 40 mmHg. If the degree of vacuum is insufficient, the drying speed is reduced, water is present when the salt crystals and the mineral component-containing substance are mixed, and the introduction and dispersion efficiency of the mineral components into the salt crystals is reduced. On the other hand, if the degree of vacuum is too high, the manufacturing cost becomes high and the risk also increases. When it is in the range of -730 to -740 mmHg, the introduction property of other components into the crystal becomes good, and the safety can be secured.

In the present invention, while stirring and mixing under reduced pressure, the pressure in the vacuum stirrer is temporarily changed from atmospheric pressure to -50 m.
By raising the pressure to mHg and then reducing the pressure again, the water that has escaped from the crystal by the reduced pressure drying can be released to the outside of the apparatus, so that the dehydration action can be promoted. If the pressure in the vacuum stirrer, which is temporarily increased, is too high, the efficiency of the next pressure reduction is reduced, while if it is too low, the moisture releasing effect is reduced.

In the present invention, as the vacuum stirrer, for example, a NO-BD-050 type vacuum stirrer manufactured by Otsuka Manufacturing Co., Ltd. is used, but it is possible to stably maintain a depressurized state of -700 to -750 mmHg, and a stirring means. If you have
There is no particular limitation. In the present invention, the substances introduced into the crystals of salt include not only mineral components but also so-called health food components such as aloe components and chitin chito acid contained in crab shells.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to Examples. Example 1 FIG. 1 is an explanatory diagram of a vacuum stirrer used in the present invention. The vacuum stirrer includes a vacuum container 1, a lid 2, a first stirrer 3 and a second stirrer 4 provided in the vacuum container 1, and a motor 8 for rotating the stirrers 3 and 4.
And a leak pipe 6 provided on the lid 2 and connected to a vacuum pump (not shown) and a leak pipe 6 having a leak valve 7.

In such a construction, for example, a chemical salt (manufactured by JT) 300 pulverized by a known means to have a particle size of 100 to 300 μm and produced by an ion exchange membrane method.
kg, potassium chloride 0.9 kg, magnesium chloride 6.5 kg and calcium chloride 0.5 kg are charged into the vacuum container 1, the lid 2 is closed, and then the inside of the container is closed by a vacuum pump (not shown) through the vacuum pipe 5. Pressure is -700mm
The temperature was lowered to Hg, and in this state, the first stirrer 3 for mainly stirring the central part of the vacuum container 1 and the second stirrer 4 for mainly stirring the side wall part of the vacuum container 1 were rotated by the motor 8 and stirred and mixed for 15 minutes. . At this time, the average pressure in the vacuum container 1 was −730 to −740 mmHg. Then, while the stirring state is maintained, the leak valve 7 of the leak pipe 6 is opened to temporarily raise the pressure in the vacuum container 1 to -20 mmHg, and then the pressure is reduced again to -700 mmHg (average pressure: -730 to -740 mmHg). Then, the mixture was further stirred for 15 minutes to prepare a mineral salt.

2 and 3 are photographs substituting for the drawings, each showing the crystal structure of the obtained mineral salt crystals taken by a scanning electron microscope (SEM). In FIG. 2, it can be seen that the calcium particles shown in yellow are uniformly dispersed while being impregnated in one crystal of common salt. Also,
In FIG. 3, it can be seen that the magnesium particles shown in red are introduced in a state of being impregnated in one crystal of the whole salt and uniformly dispersed.

FIG. 4 is a diagram showing the result of X-ray diffraction for one crystal of the mineral salt obtained in the above-mentioned embodiment. In the figure, it can be seen that one salt crystal contains the mineral components calcium, magnesium and potassium. Furthermore, Table 1 shows the quantitative results of the mineral components contained in the mineral salts obtained in the above examples.

[0022]

[Table 1] From Table 1, the potassium chloride content in the obtained mineral salt is 0.23 wt% and the calcium chloride content is 0.1.
4wt%, magnesium chloride content is 1.72wt%
It turns out that it was. From these results, it can be seen that the mineral salts prepared in the above examples contain mineral components comparable to natural salts.

FIGS. 5 to 7 and 8 to 10 are crystals, respectively, of the mineral salt obtained in Example 1 and the chemical salt as a raw material thereof, an enlarged view thereof, and a photograph as a drawing substitute of a crystal structure showing one unit of the crystal. Is. In FIGS. 6 and 9, since the mineral salts obtained in the examples are dried under vacuum to reduce the water content, the crystals of salt and the substance containing the other component are dispersed in a state of simply overlapping each other. I understand. On the other hand, in the case of a chemical salt, since it contains a large amount of water, it can be seen that the crystals stick to each other due to their own water and try to harden. That is, it can be seen that the mineral salts obtained in the examples have a smaller degree of deliquescent than the chemical salt as the raw material salt.

Further, from FIGS. 7 and 10, the mineral salts obtained in the examples have rounded corners of the crystals as compared with the chemical salts, and for example, they are used for rubbing on the skin surface of the human body for health management. It is understood that the crystal form is suitable in the cases such as.

[0025]

According to the invention described in claim 1 of the present application, a crystal and a substance containing a component different from the constituent components of the crystal are put into a vacuum stirrer, and stirred and mixed under reduced pressure. By this, other components can be introduced so as to be impregnated in the crystal and uniformly dispersed.

According to the second aspect of the present invention, in the above invention, stirring is performed under a reduced pressure of -700 mmHg or less,
By mixing, the introduction efficiency of other components is significantly improved as compared with the above effect. According to the invention of claim 3 of the present application, during stirring and mixing, the pressure in the vacuum stirrer is once opened to atmospheric pressure to atmospheric pressure to −50 mmHg, and then −70 again.
By reducing the pressure to 0 mmHg or less, water generated during vacuum drying can be released to the outside of the vacuum container.
In addition to the effects of the above invention, the drying action can be promoted.

According to the invention of claim 4 of the present application, the crystals of salt and the substance containing a mineral component are put into a vacuum stirrer, and the mixture is stirred and mixed under a reduced pressure of -700 to -750 mmHg. The mineral component can be impregnated into the crystals of sodium chloride and uniformly dispersed without requiring a large amount of equipment and a lot of land. Therefore, the production cost of mineral salts can be reduced. Further, according to the present invention, a mineral salt containing a desired amount of a desired mineral component can be freely prepared by arbitrarily selecting the type and amount of the substance containing a mineral component.

According to the invention of claim 5 of the present application, a mineral salt close to a natural salt component is prepared by using at least one of potassium chloride, magnesium chloride and calcium chloride as the mineral component-containing substance. be able to. According to the invention of claim 6 of the present application, by using a chemical salt as the raw material salt,
It is possible to obtain a highly safe mineral salt that does not contain contaminants, harmful substances such as mercury and PCB.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a vacuum stirrer used for carrying out the present invention.

FIG. 2 is a drawing-substituting photograph showing a crystal structure of a mineral salt obtained in an example of the present invention.

FIG. 3 is a drawing-substituting photograph showing a crystal structure of a mineral salt obtained in an example of the present invention.

FIG. 4 is a diagram showing the results of X-ray diffraction of the mineral salts obtained in the examples.

[Fig. 5]

[FIG. 6]

FIG. 7 is a drawing-substitute photograph showing the crystal structure of the mineral salt obtained in the example.

FIG. 8

FIG. 9

FIG. 10 is a drawing-substitute photograph showing the crystal structure of a chemical salt.

FIG. 11:

FIG. 12 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vacuum container, 2 ... Lid, 3 ... 1st stirrer, 4 ... 2nd stirrer, 5 ... Vacuum piping, 6 ... Leak piping, 7 ... Leak valve, 8
... motor, 21 ... pump, 22 ... seawater tank, 23 ... ion exchange membrane dialysis tank, 24 ... brine tank, 25 ... vacuum evaporation can, 2
6, 27 ... Centrifuge, 28 ... Dryer, 29 ... Seawater, 3
0 ... branched water, 31 ... normal salt, 32 ... salt.

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[Procedure amendment]

[Submission date] January 8, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

2 and 3 are photographs substituting for the drawings, each showing the crystal structure of the obtained mineral salt crystals taken by a scanning electron microscope (SEM). In FIG.
It can be seen that the um particles are uniformly dispersed while impregnating one crystal of common salt. In addition, in FIG.
It can be seen that the magnesium particles were introduced while being impregnated in one crystal of the whole salt and were uniformly dispersed. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 8, 1996

[Procedure Amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

[Fig. 2]

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

[Figure 3]

Claims (6)

[Claims] 1. A crystal and a substance containing a component different from the constituent components of the crystal are put into a vacuum stirrer, and stirred and mixed under reduced pressure to disperse the other component in the crystal. Method of introducing other components into the crystal. 2. Stirring under reduced pressure of -700 mmHg or less,
The method for introducing another component into the crystal according to claim 1, wherein the method comprises mixing. 3. The method according to claim 2, wherein during stirring and mixing, the pressure in the vacuum stirrer is once opened to the atmospheric pressure to atmospheric pressure to −50 mmHg, and then reduced again to −700 mmHg or less. Method for introducing other components into the crystals of. 4. Salt crystals and a substance containing a mineral component are put into a vacuum stirrer, stirred under reduced pressure of −700 to −750 mmHg, and mixed to disperse the mineral component in the salt crystals. A method for producing a characteristic mineral salt. 5. The method for producing a mineral salt according to claim 4, wherein the mineral component-containing substance is at least one of potassium chloride, magnesium chloride and calcium chloride. 6. The method for producing a mineral salt according to claim 4, wherein a chemical salt is used as the salt.