KR102269675B1 - Method of separating mineral selectively from natural mineral resource and composition separated therefrom - Google Patents

Abstract

The present invention comprises the steps of: (a) primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively; (b) passing the divalent cation enriched water obtained in step (a) through a cation exchange resin to obtain concentrated mineral water in which divalent cations in the divalent cation enriched water are substituted with monovalent cations; and (c) performing secondary electrodialysis of the mineral concentrated water obtained in step (b) to obtain a primary cationic mineral composition and a trace mineral composition, respectively. Thus, the various mineral compositions finally obtained by the separation method can be usefully used in various compositions such as cosmetic compositions, food compositions, and pharmaceutical compositions.

Description

Method for selective separation of minerals from natural mineral resources and compositions separated therefrom {METHOD OF SEPARATING MINERAL SELECTIVELY FROM NATURAL MINERAL RESOURCE AND COMPOSITION SEPARATED THEREFROM}

The present invention relates to a method for selectively separating minerals from mineral seawater and seawater treated water, which are natural mineral resources, various mineral compositions finally obtained by the separation method, and various uses thereof.

Sea water is a huge water resource that occupies about 97% of the earth's surface (refer to the Korea Rural Community Corporation data), and refers to all water that can be taken from the sea, including salinity (average: 3.5%). Seawater can be subdivided into various subdivisions such as surface water, deep sea water, and lava seawater depending on the location of intake. Such seawater is called a natural mineral resource because it contains abundant minerals such as sodium, potassium, calcium, and magnesium and trace minerals such as iron and zinc.

Deep ocean water is a clean water resource that exists below 200m in depth where sunlight does not reach. It has little possibility of influx of pollutants from the land or the atmosphere, maintains a low temperature all year round, and is stable in its properties because it is formed over thousands of years. In addition, there are almost no organic substances and pathogens, and more than 70 kinds of various minerals such as calcium, potassium, and sodium are contained. Some of these minerals are known to have an excellent effect on free radical scavenging. In addition, the mineral composition of seawater and deep seawater is Mg:Ca:K = 3:1:1, which is similar to human body fluid and mineral composition, and is present in water in the form of ions, so that it can be quickly absorbed into the body.

For this reason, studies are also being actively conducted to selectively separate or purify desired minerals among abundant minerals contained in seawater to further increase utility. A number of patents describe a method for producing mineral salt or mineral water from deep sea water using electrolysis, electrodialysis or reverse osmosis membrane. However, this simply relates to a method for preparing water, beverage or salt from which excess salt (NaCl) has been removed to alleviate the salty taste of deep sea water, or to a process for separating monovalent ions and divalent ions. Therefore, there is a limitation in preparing a mineral composition containing a large amount of the specific mineral by selectively separating a specific mineral other than sodium, ie, magnesium, calcium, or potassium.

In particular, there is an attempt to separate minerals by electrodialysis and evaporative concentration in registered patent KR 10-0899012, but since the divalent cation selective exchange membrane is not currently commercialized, it is difficult to industrialize it, and the cost of using the electrodialysis device twice is required. On the other hand, there are difficulties in industrialization. In addition, since sodium ions are precipitated as sparingly soluble salts through electrolysis and removed, there is a limitation in that sodium ions cannot be secured as a mineral composition.

Minerals lost in various water treatment processes play an important role in maintaining health in the body. For example, sodium and potassium play a major role in maintaining the body's blood pressure and water content while maintaining the mutual body balance in the case of an antagonistic action between minerals. Even in the case of magnesium and calcium, they play an important role in maintaining mutual mineral content, and when this balance is broken, adult diseases such as hypertension, diabetes, and metabolic syndrome are induced. In addition, trace minerals also play an important role in the human body. Selenium plays a role in removing free radicals, molybdenum is involved in nitrogen metabolism, and iron is an essential element for hemoglobin, an oxygen source.

As such, minerals are very important elements for the human body, and if they are insufficient, they will cause deficiency, but if they are excessive, they will cause excess, so it is important to consume an appropriate amount for the human body. However, the minerals that are lacking in the body are different depending on various factors such as a person's health condition, physical characteristics, eating habits, and heredity, so it is necessary to selectively separate minerals to supply minerals that are suitable for each person's characteristics. Therefore, if each mineral component can be selectively separated from natural mineral resources containing various active minerals, it will be possible to easily supply appropriate minerals in an easily absorbed ionic state for each individual.

The present invention comprises the steps of: (a) primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively; (b) passing the divalent cation enriched water obtained in step (a) through a cation exchange resin to obtain concentrated mineral water in which divalent cations in the divalent cation enriched water are substituted with monovalent cations; and (c) performing secondary electrodialysis of the mineral concentrated water obtained in step (b) to obtain a primary cationic mineral composition and a trace mineral composition, respectively. would like to provide

However, the technical problem to be achieved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned above will be clearly understood by those skilled in the art through the contents described below.

The present invention comprises the steps of: (a) primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively; (b) passing the divalent cation enriched water obtained in step (a) through a cation exchange resin to obtain concentrated mineral water in which divalent cations in the divalent cation enriched water are substituted with monovalent cations; and (c) performing secondary electrodialysis of the mineral concentrated water obtained in step (b) to obtain a primary cationic mineral composition and a trace mineral composition, respectively. do.

In step (a), the mineral seawater or seawater treated water may be any one selected from the group consisting of surface water, deep sea water, and lava seawater.

In steps (a) to (c), the monovalent cation may be a sodium ion (Na ⁺ ) or a potassium ion (K ⁺ ), and the divalent cation may be a magnesium ion (Mg ²⁺ ) or a calcium ion (Ca ²⁺ ). have.

In step (b), the ion exchange resin may be a zeolite or a synthetic polymer cation exchange resin.

In the step (b), in the mineral concentrated water, the total concentration of divalent cations in the divalent cation concentrated water may be reduced, and the total concentration of monovalent cations may be increased.

The trace mineral composition in step (c) may contain one or more trace minerals selected from the group consisting of silica, iron, vanadium, selenium, molybdenum, copper, phosphorus and iodine.

(d) evaporating the monovalent cation-concentrated water obtained in step (a) to obtain a sodium salt and potassium mineral composition, respectively, may be further included.

In one embodiment of the present invention, it is obtained by primary electrodialysis of mineral seawater or seawater treated water, and is monovalent cation concentrated water with increased salty taste, wherein the monovalent cation concentrated water is based on 5500 to 6000 parts by weight of sodium ions. , 300 to 400 parts by weight of potassium ions, 400 to 500 parts by weight of magnesium ions, and 100 to 200 parts by weight of calcium ions, to provide a monovalent cation concentrated water.

In another embodiment of the present invention, it is obtained by primary electrodialysis of mineral seawater or seawater treated water, and is divalent cation enriched water with increased sweetness, wherein the divalent cation enriched water is based on 900 to 1000 parts by weight of magnesium ions. , 100 to 200 parts by weight of sodium ions, 1 to 15 parts by weight of potassium ions, 900 to 1000 parts by weight of magnesium ions, and 200 to 300 parts by weight of calcium ions.

The present invention relates to a method for selectively separating minerals from mineral seawater and seawater treated water, which are natural mineral resources, comprising: (a) a first electrodialysis step; (b) a cation exchange resin step for the divalent cation enriched water obtained from the first electrodialysis step; And (c) characterized in that it essentially comprises a secondary electrodialysis step, it is possible to selectively separate each of the primary cationic mineral composition and the trace mineral composition. In addition, (d) when the evaporation concentration step for the monovalent cation concentrated water obtained from the first electrodialysis step is selectively included, the potassium mineral composition can also be selectively separated. The various mineral compositions finally obtained by the separation method can be usefully used in various compositions such as cosmetic compositions, food compositions, and pharmaceutical compositions.

1 is a schematic diagram illustrating a method for selectively separating minerals from mineral seawater and seawater treated water, which are natural mineral resources, according to an embodiment of the present invention.
2 is a schematic diagram illustrating a method for selectively separating minerals from mineral seawater and seawater treated water, which are natural mineral resources, according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention comprises the steps of: (a) primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively; (b) passing the divalent cation enriched water obtained in step (a) through a cation exchange resin to obtain concentrated mineral water in which divalent cations in the divalent cation enriched water are substituted with monovalent cations; and (c) performing secondary electrodialysis of the mineral concentrated water obtained in step (b) to obtain a primary cationic mineral composition and a trace mineral composition, respectively. do.

As used herein, "monovalent cation" means a sodium ion (Na ⁺ ) or potassium ion (K ⁺ ), and "divalent cation" in this specification means a magnesium ion (Mg ²⁺ ) or a calcium ion ( Ca ²⁺ ).

First, the selective separation method of minerals according to the present invention includes a step [step (a)] of primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively. .

Specifically, the mineral seawater or seawater treated water refers to seawater or seawater treated water containing various minerals as a natural mineral resource, in this case, the seawater refers to a state taken from the sea, and the seawater treated water is the sea It refers to the state in which physical treatment is performed through sterilization or filtering treatment after water intake. More specifically, the mineral seawater or seawater treated water may be any one selected from the group consisting of surface water, deep sea water, and lava seawater.

The primary electrodialysis may be performed using a monovalent cation exchange membrane, and through this, monovalent cation enriched water and divalent cation enriched water may be obtained, respectively. In both the monovalent cation enriched water and the divalent cation enriched water, the total content of cationic minerals may be reduced compared to the mineral seawater or seawater treated water.

However, the monovalent cation enriched water may have an increased content of monovalent cations (sodium ions and potassium ions), based on the total amount of cationic minerals, compared to the mineral seawater or seawater treated water, and specifically, The monovalent cation enriched water may contain 300 to 400 parts by weight of potassium ions, 400 to 500 parts by weight of magnesium ions, and 100 to 200 parts by weight of calcium ions, based on 5500 to 6000 parts by weight of sodium ions, and more specifically, The concentrated cations may contain 5500 to 6000 ppm of sodium ions, 300 to 400 ppm of potassium ions, 400 to 500 ppm of magnesium ions and 100 to 200 ppm of calcium ions. As such, due to the high content of sodium and potassium ions and the low content of magnesium and calcium ions, as a result of a 9-point scale sensory test for taste perception targeting a total of 10 expert panels, the salty taste is emphasized compared to the diluted solution of deep sea water, and the soft throat It is characterized by excellent roll-over and reduced slippery taste.

In addition, the divalent cation enriched water may have an increased content of divalent cations (magnesium ions and calcium ions), based on the total cationic mineral content, compared to the mineral seawater or seawater treated water, and specifically, The divalent cation enriched water may contain 100 to 200 parts by weight of sodium ions, 1 to 15 parts by weight of potassium ions, 900 to 1000 parts by weight of magnesium ions, and 200 to 300 parts by weight of calcium ions based on 900 to 1000 parts by weight of magnesium ions. And, more specifically, the divalent cation enriched water may contain 100 to 200 ppm of sodium ions, 1 to 15 ppm of potassium ions, 900 to 1000 ppm of magnesium ions, and 200 to 300 ppm of calcium ions. As such, due to the low content of sodium and potassium ions and the high content of magnesium and calcium ions, as a result of a 9-point scale sensory test for taste perception targeting a total of 10 expert panels, the sweetness was higher than that of the deep sea water mineral concentrate, It is characterized by excellent smooth throat roll.

Next, in the selective separation method of minerals according to the present invention, the divalent cation enriched water obtained in step (a) is passed through a cation exchange resin, and the divalent cations in the divalent cation enriched water are converted into monovalent cations. and obtaining a substituted mineral concentrated water [step (b)].

The cation exchange resin is for replacing a divalent cation with a monovalent cation, and is preferably a zeolite or a synthetic polymer cation exchange resin, more preferably a zeolite, but is not limited thereto. In this case, the zeolite has a microporous structure and a large surface area, so that the substitution reaction is faster than the synthetic polymer cation exchange resin. Of course, synthetic polymeric cation exchange resins can also be manufactured in a porous structure to increase the surface area, but when the same size is used, the surface area is significantly smaller than that of zeolite and the cost is high. In addition, zeolite (zeolite) has a property of weakly bonding with cations, and has the advantage of being easily reproduced and washed, and can be washed with seawater. In addition, zeolite can act as an adsorption function at the same time, and thus can serve as a water purifying agent to remove dust, colloids, etc. remaining in the sample or introduced from the outside.

Accordingly, in the mineral enriched water, the total concentration of divalent cations in the divalent cation enriched water may be reduced and the total concentration of monovalent cations may be increased.

Next, the selective separation method of minerals according to the present invention comprises the steps of obtaining a primary cationic mineral composition and a trace mineral composition, respectively, by secondary electrodialysis of the mineral concentrated water obtained in step (b) [(c) step ] is included.

The secondary electrodialysis may also be performed using a monovalent cation exchange membrane, and through this, a primary cationic mineral composition and a trace mineral composition may be obtained, respectively. Both the primary cationic mineral composition and the trace mineral composition may have a reduced total content of cationic minerals compared to the mineral concentrated water. However, the primary cationic mineral composition may have an increased content of monovalent cations (sodium ion and potassium ion), based on the total cationic mineral content, compared to the mineral concentrated water. Accordingly, in the trace mineral composition, the content of monovalent cations (sodium ion and potassium ion) is reduced based on the total content of cationic minerals, compared to the mineral concentrated water, and the trace mineral content may be increased. Specifically, the trace mineral composition may contain one or more trace minerals selected from the group consisting of silica, iron, vanadium, selenium, molybdenum, copper, phosphorus and iodine. More specifically, the trace mineral composition is silica (Si) 0.1 to 0.5 ppm, iron (Fe) 0.1 to 0.5 ppm, vanadium (V) 0.01 to 0.1 ppm, selenium (Se) 5 to 12 ppm, molybdenum (Mo) 0.1 ~ 1 ppm, copper (Cu) 0.1 ~ 0.5 ppm, phosphorus (P) 0.01 ~ 0.1 ppm and iodine (I) 0.1 ~ 1 ppm.

Optionally, the selective separation method of minerals according to the present invention includes a step [(d) step] of evaporating and concentrating the monovalent cation concentrated water obtained in step (a) to obtain a sodium salt and potassium mineral composition, respectively do.

Both the sodium salt and the potassium mineral composition may have a reduced total content of cationic minerals compared to the monovalent cation concentrated water. However, the sodium salt may have an increased content of sodium ions, based on the total content of cationic minerals, compared to the monovalent cation enriched water. In addition, the potassium mineral composition may have an increased content of potassium ions, based on the total content of cationic minerals, compared to the monovalent cation enriched water.

Specifically, the sodium salt may contain 5500 to 5800 ppm of sodium ions, 0 to 50 ppm of potassium ions, 100 to 400 ppm of magnesium ions, and 50 to 250 ppm of calcium ions, and the potassium mineral composition is 5 to 150 ppm of sodium ions. ppm, potassium ions 100-350 ppm, magnesium ions 0-50 ppm, and calcium ions 0-10 ppm.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not to be construed as being limited by these examples.

Example 1: Analysis of Cationic Mineral Content in Mineral Seawater

Mineral seawater was prepared by collecting surface water, deep sea water, and lava seawater from the domestic sea, respectively, and the cation mineral content was measured through inductively coupled plasma spectroscopy (ICP-AES).

division surface water deep sea water lava seawater cationic minerals
content
(ppm) sodium ion 10500~11000 10500~11000 10500~11000 potassium ion 350-500 350-500 350-500 magnesium ion 1250-1400 1250-1400 1250-1400 calcium ion 350-450 350-450 350-450

Example 2: Obtaining monovalent and divalent cation enriched water through primary electrodialysis from mineral seawater

(1) The surface layer water according to Example 1 was subjected to primary electrodialysis using a monovalent cation exchange membrane (CIMS, ASTOM) to obtain monovalent cation concentrated water and divalent cation concentrated water, respectively, and inductively coupled plasma spectroscopy (ICP) -AES), the cationic mineral content was determined.

division surface water Monovalent Cation Concentrate divalent cation concentrate cationic minerals
content
(ppm) sodium ion 10500~11000 5500~6000 100-200 potassium ion 350-500 300-400 1-15 magnesium ion 1250-1400 400-500 900~1000 calcium ion 350-450 100-200 200-300

As shown in Table 2, it is confirmed that the total content of cationic minerals is reduced compared to the surface layer water in both the monovalent cation enriched water and the divalent cation enriched water. However, the monovalent cation enriched water was confirmed to have an increased content of monovalent cations (sodium ion and potassium ion) based on the total content of cationic minerals compared to the surface water, and the divalent cation enriched water compared to the surface water, cationic minerals Based on the total content, it is confirmed that the content of divalent cations (magnesium ion and calcium ion) has increased.

(2) The monovalent cation-concentrated water obtained in (1) of Example 2 is a mineral composition, and the improvement was evaluated by comparing it with a diluted solution of deep sea water prepared to have the same sodium ion content. For sensory evaluation of each sample, a total of 10 expert panelists compared sweet, salty, bitter, soft throat, and slippery taste on a 9-point scale with distilled water as 0 points, and overall preference was a score for personal preference. This was done on a 9-point scale.

division Monovalent Cation Concentrate Deep sea water dilution cationic minerals
content
(ppm) sodium ion 5500~6000 5500~6000 potassium ion 300-400 150-250 magnesium ion 400-500 600-700 calcium ion 100-200 150-250

division Monovalent Cation Concentrate Deep sea water dilution* sweetness 2.8 1.7 salty 8.5 7.2 bitter 3.3 3.4 soft throat roll 6.4 4.8 slippery taste 3.2 5.4 overall sign 7.1 5.2

* Deep sea water dilution solution: A solution obtained by diluting deep sea water with the same sodium content as monovalent cation concentrated water

As shown in Tables 3 and 4, in the case of monovalent cation enriched water, due to the high content of potassium ions and the low content of magnesium ions, even if the content of the sodium ion and the dilution of deep sea water were the same, a stronger salty taste could be felt. , It is confirmed that the sweet taste and soft mouthfeel are excellent compared to the deep sea water dilution, and the overall preference is high by reducing the slippery taste. That is, in the case of the primary cation enriched water, it can be seen that the sensory function is improved compared to the deep sea water dilution.

(3) In addition, the divalent cation concentrated water obtained in (1) of Example 2 is also a mineral composition, and the function is evaluated by comparing it with the dilution of the mineral concentrated water of deep sea water prepared to have the same magnesium ion content. did. For sensory evaluation of each sample, a total of 10 expert panelists compared sweet, salty, bitter, soft throat, and slippery taste on a 9-point scale with distilled water as 0 points, and overall preference was a score for personal preference. This was done on a 9-point scale.

division divalent cation concentrate Deep sea water mineral concentrated water dilution cationic minerals
content
(ppm) sodium ion 100-200 240-270 potassium ion 1-15 240-270 magnesium ion 900~1000 900~1000 calcium ion 200-300 1-5

division divalent cation concentrate Deep sea water mineral concentrated water dilution* sweetness 4.4 1.5 salty 1.6 5.4 bitter 1.5 1.8 soft throat roll 7.3 3.3 slippery taste 5.1 4.9 overall sign 7.5 3.4

* Deep sea water mineral concentrate dilution solution: A solution obtained by diluting deep sea water mineral concentrate with the same magnesium content as divalent cation concentrated water

As shown in Tables 5 and 6, in the case of divalent cation enriched water, due to the low content of sodium and potassium ions and the high content of calcium ions, compared to the dilution of the mineral concentrate of deep sea water with the same content of magnesium ions, the sweetness is It has a high, low salty taste, and a smooth mouthfeel is excellent, and it is confirmed that the overall preference is high. That is, in the case of the secondary cation-concentrated water, it can be seen that the sensory function is improved compared to the deep-sea mineral-concentrated water dilution.

(4) Therefore, monovalent cation enriched water is a mineral composition with high salty taste, and divalent cation enriched water is a mineral composition with high sweetness. It can be seen that the sensory improvement was improved compared to the deep water dilution or the deep sea mineral concentrated water dilution. Through this, both monovalent cation-concentrated water and divalent cation-concentrated water can be used in various compositions such as cosmetic compositions, food compositions and pharmaceutical compositions by replacing deep sea water through dilution or blending with other compositions. .

Example 3: Obtaining a mineral composition from divalent cation enriched water through cation exchange resin and secondary electrodialysis

(1) By passing the divalent cation-concentrated water obtained in (1) of Example 2 through a cation exchange resin filled with zeolite 4A, the divalent cations in the divalent cation-concentrated water are replaced with monovalent cations By doing so, mineral concentrated water was obtained. Thereafter, secondary electrodialysis was performed using a monovalent cation exchange membrane (CIMS, ASTOM) to obtain a monovalent cationic mineral composition and a trace mineral composition, respectively, and through inductively coupled plasma spectroscopy (ICP-AES), the cationic mineral content was measured measured.

division divalent cation concentrate mineral
concentrated water Monovalent cationic mineral composition trace mineral composition cationic minerals
content
(ppm) sodium ion 100-200 1800~2300 1500~2200 50-150 potassium ion 1-15 1-15 1-15 0~3 magnesium ion 900~1000 50 to 100 5-10 40-90 calcium ion 200-300 30-50 1-5 10-40

As shown in Table 7, it was confirmed that the content of magnesium ions and calcium ions decreased, and the content of sodium ions increased in the mineral concentrated water compared to the divalent cation concentrated water. At this time, when the mineral concentrated water is subjected to secondary electrodialysis, a large amount of sodium ions and potassium ions and trace amounts of magnesium ions and calcium ions are separated into a monovalent cation mineral composition, and the trace mineral composition has a greater amount than that of the divalent cation concentrated water. It is confirmed that the content of minerals sodium ion, potassium ion, magnesium ion and calcium ion are all reduced.

In addition, the trace mineral composition is a trace mineral, silica (Si) 0.1 ~ 0.5 ppm, iron (Fe) 0.1 ~ 0.5 ppm, vanadium (V) 0.01 ~ 0.1 ppm, selenium (Se) 5 ~ 12 ppm, molybdenum (Mo) It is confirmed to contain 0.1 to 1 ppm, copper (Cu) 0.1 to 0.5 ppm, phosphorus (P) 0.01 to 0.1 ppm, and iodine (I) 0.1 to 1 ppm.

(2) Therefore, the trace mineral composition is a composition with a higher ratio of trace minerals to various minerals compared to other compositions, and it replaces deep sea water through dilution or blending with other compositions, so that cosmetic compositions, food compositions, and pharmaceutical compositions are used. It can be usefully used in various compositions such as compositions.

Example 4: Obtaining a mineral composition from monovalent cation-concentrated water through evaporation

The monovalent cation-concentrated water obtained in (1) of Example 2 was evaporated to about 10-95% at 10-80°C in a vacuum, and then solid-liquid separation was performed to precipitate sodium salt in a solid state. was obtained, a liquid potassium mineral composition was obtained, and the cationic mineral content was measured through inductively coupled plasma spectroscopy (ICP-AES).

division Monovalent Cation Concentrate sodium salt Potassium mineral composition cationic minerals
content
(ppm) sodium ion 5500~6000 5500~5800 5-150 potassium ion 300-400 0-50 100-350 magnesium ion 400-500 100-400 0-50 calcium ion 100-200 50-250 0-10

As shown in Table 8, it was confirmed that the total content of cationic minerals was decreased compared to the monovalent cation enriched water for both the sodium salt and the potassium mineral composition. However, it is confirmed that the sodium salt content is increased based on the total cationic mineral content compared to the monovalent cation enriched water, and the potassium mineral composition is compared to the monovalent cation enriched water, based on the total cationic mineral content. , it is confirmed that the content of potassium ions increased.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (9)

(a) primary electrodialysis of mineral seawater or seawater treated water to obtain monovalent cation enriched water and divalent cation enriched water, respectively;
(b) passing the divalent cation enriched water obtained in step (a) through a cation exchange resin, the divalent cations in the divalent cation enriched water are substituted with monovalent cations, (calcium ion + magnesium ion + potassium ion) / (sodium ion) to obtain a ratio of 0.03 ~ 0.09 mineral concentrated water; and
(c) secondary electrodialysis of the mineral concentrated water obtained in step (b), (calcium ion + magnesium ion + potassium ion) / (sodium ion) ratio of 0.003 to 0.020 primary cationic mineral composition and (calcium) ion + magnesium ion + potassium ion) / (sodium ion) ratio of 0.33 to 2.66 to obtain a trace mineral composition, respectively,
In the step (b), in the mineral concentrated water, the total concentration of divalent cations in the divalent cation enriched water is reduced, and the total concentration of monovalent cations is increased.
According to claim 1,
In the step (a), the mineral seawater or seawater treated water is any one selected from the group consisting of surface water, deep sea water, and lava seawater, a selective separation method of minerals.
According to claim 1,
In steps (a) to (c), the monovalent cation is a sodium ion (Na ⁺ ) or a potassium ion (K ⁺ ), and the divalent cation is a magnesium ion (Mg ²⁺ ) or a calcium ion (Ca ²⁺ ) Characterized, selective separation method of minerals.
According to claim 1,
In the step (b), the ion exchange resin is a zeolite or a synthetic polymeric cation exchange resin, a selective separation method of minerals.
delete According to claim 1,
In step (c), the trace mineral composition contains one or more trace minerals selected from the group consisting of silica, iron, vanadium, selenium, molybdenum, copper, phosphorus and iodine.
According to claim 1,
(d) evaporating the monovalent cation-concentrated water obtained in step (a) to obtain a sodium salt and potassium mineral composition, respectively, a selective separation method of minerals.
According to the separation method of claim 1, it is obtained by primary electrodialysis of mineral seawater or seawater treated water, as monovalent cation concentrated water with increased salty taste,
The monovalent cation concentrated water is based on 5500 to 6000 parts by weight of sodium ions, 300 to 400 parts by weight of potassium ions, 400 to 500 parts by weight of magnesium ions, and 100 to 200 parts by weight of calcium ions, monovalent cation concentrated water.
As divalent cation concentrated water with increased sweetness obtained by primary electrodialysis of mineral seawater or seawater treated water according to the separation method of claim 1,
The divalent cation enriched water contains 100 to 200 parts by weight of sodium ions, 1 to 15 parts by weight of potassium ions, 900 to 1000 parts by weight of magnesium ions, and 200 to 300 parts by weight of calcium ions based on 900 to 1000 parts by weight of magnesium ions. , divalent cation enriched water.

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