Method for producing mineral-rich boiled salt

A multi-step process using filtration, sterilization, and mineral enrichment methods produces clean, mineral-rich salt by effectively removing impurities and enhancing mineral content in sea salt production.

WO2025264074A1PCT designated stage Publication Date: 2025-12-26HUR SUNGGONG
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
PCT/KR2025/095062
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-18
Filing Date
2025-03-21
Publication Date
2025-12-26

AI Technical Summary

Technical Problem

Existing methods for producing sea salt fail to sufficiently remove impurities and maintain mineral content due to seawater pollution, resulting in low mineral content and potential health hazards from microplastics and bitterness.

Method used

A multi-step process involving filtration, far-infrared sterilization, charcoal purification, mineral enrichment, and dehydration to produce mineral-rich salt, including gravel, charcoal, and bamboo charcoal filtration, and mineral supplementation using yellow clay and bamboo.

Benefits of technology

Produces clean, mineral-rich salt by effectively removing impurities and enhancing mineral content, addressing contamination and mineral deficiency issues in existing sea salt production methods.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure KR2025095062_26122025_PF_FP_ABST
    Figure KR2025095062_26122025_PF_FP_ABST
Patent Text Reader

Abstract

Provided is a method for producing pure, mineral-rich boiled salt. The method for producing boiled salt is characterized by comprising the steps of: (a) collecting seawater from the sea, passing the seawater through a filtration tank, and storing the seawater in a seawater storage tank; (b) increasing the salinity of the seawater; (c) transferring the seawater increased in salinity to a far-infrared radiation furnace and sterilizing the seawater; (d) transferring the sterilized seawater to a charcoal-refining furnace and refining the seawater; (e) transferring the refined seawater to a mineral-reinforcing furnace and reinforcing the seawater with minerals; (f) transferring the mineral-reinforced seawater to a bamboo charcoal-refining furnace and removing the bitter taste of the seawater; (g) transferring the bitter taste-removed seawater to a decontamination furnace and forming salt crystals; (h) transferring the salt crystals to a dehydrator and dehydrating the salt crystals; and (i) transferring the dehydrated salt crystals to a drying facility and drying the dehydrated salt crystals.
Need to check novelty before this filing date? Find Prior Art

Description

Method for producing mineral-rich sea salt

[0001] The present invention relates to a method for producing mineral-rich salt.

[0002] Salt aids in the digestion and absorption of food and transmits electrical signals from nerve cells to muscles. It also helps maintain a slightly alkaline balance in the body, preventing acidic substances produced during digestion. A salt deficiency in the body can lead to systemic symptoms such as vomiting, respiratory distress, and loss of appetite.

[0003] Salt is an important source of vital nutrients for the human body because it contains various inorganic minerals necessary for the human body, such as calcium, magnesium, manganese, iron, and potassium, in addition to sodium.

[0004] Salt is made from rock salt, natural salt, and seawater. In Korea, salt is primarily produced from seawater. Salts derived from seawater include solar salt, made by evaporating seawater; smelting salt, made by filtering and heating sea salt; refined salt, made by electrolyzing seawater; and jayeom, a traditional Korean salt made by boiling seawater.

[0005] Sea salt was introduced to Korea during the Japanese colonial period. It is a method of making salt by simply evaporating seawater without a separate filtration process. Therefore, the salt contains a significant amount of impurities such as microplastics, has a strong salty and bitter taste, and is harmful to the human body.

[0006] Because refined salt is produced through an electrolytic process, its components consist only of sodium and chlorine and are lacking in nutrients such as minerals.

[0007] Since sea salt is made by boiling seawater, the heating process removes impurities and microplastics that are harmful to the human body and give it a bitter taste, but it is a manufacturing method that does not destroy minerals, so it is quite beneficial to the human body.

[0008] However, existing methods for producing sea salt, which were used before the oceans became as polluted as they are today, were limited in their simple purification process, failing to sufficiently remove impurities from the polluted seawater and resulting in low mineral content. The present invention was developed to address these issues.

[0009] The present invention relates to a method for manufacturing salt through a heating process, and aims to provide salt rich in various minerals beneficial to the human body by producing clean salt without contamination through a refining process and a mineral adding process.

[0010] A method for producing mineral-rich salt is provided. The method for producing mineral salt comprises:

[0011] (a) a step of collecting seawater from the sea, passing it through a filtration tank, and storing it in a seawater storage tank; (b) a step of supplementing salinity to the seawater; (c) a step of sterilizing the seawater with the supplemented salinity by transferring it to a far-infrared ray irradiation furnace; (d) a step of purifying the sterilized seawater by transferring it to a bamboo charcoal purification furnace; (e) a step of supplementing minerals by transferring the purified seawater to a mineral enrichment furnace; (f) a step of removing bitterness from the seawater by transferring the mineral enriched seawater to a bamboo charcoal purification furnace; (g) a step of generating salt crystals by transferring the seawater with the bitterness removed to a desalination furnace; (h) a step of dehydrating the salt crystals by transferring them to a dehydrator; (i) a step of drying the dehydrated salt crystals by transferring them to a drying facility.

[0012] The filter tank of the above step (a) is characterized by forming a gravel layer in the upper layer, a charcoal layer in the middle layer, and a sand layer in the lower layer to remove impurities contained in seawater.

[0013] In the above step (a), the seawater storage tank is made of yellow clay, and the seawater stored in the seawater storage tank made of yellow clay is aged for 24 to 26 hours.

[0014] The above step (b) is characterized by adding 2 to 3 wt% of sea salt relative to the amount of seawater stored in the seawater storage tank.

[0015] The above step (c) is characterized by placing yellow earth and biotite inside with far-infrared radiation and applying heat for 4 to 5 hours while maintaining the seawater temperature at 70 to 80°C.

[0016] The above step (d) is characterized by applying heat to a charcoal purifier at 0.6 to 0.8 wt% of charcoal relative to the weight of seawater for 4 to 5 hours while maintaining the seawater temperature at 70 to 80°C.

[0017] The above step (e) is characterized by cutting 2-3 year old living bamboo and putting it into a mineral reinforcement furnace and applying heat for 4-5 hours while maintaining the seawater temperature at 70℃ to 80℃.

[0018] The above-mentioned living bamboo is characterized by being added in an amount of 10 to 12% by weight relative to the weight of seawater.

[0019] The above step (f) is characterized by adding 2 to 3 weight% of bamboo charcoal to seawater in a bamboo charcoal purifier and applying heat for 4 to 5 hours while maintaining the seawater temperature at 80 to 100°C.

[0020] The above step (g) is characterized by generating salt crystals by applying heat of 150℃ to 250℃ for 4 to 5 hours in a decontamination furnace.

[0021] The above step (i) is characterized by drying in a yellow clay drying room for 15 to 16 days, then transferring to a natural drying room and drying naturally in natural light for more than one month.

[0022] The present invention can produce clean, mineral-rich salt by performing a purification process and a mineral addition process in the process of manufacturing salt.

[0023] The salt produced through the manufacturing method of the present invention can not only solve the problem of contamination of Cheoniljeom, but also solve the problem of mineral-deficient salt such as refined salt and manufactured salt, thereby producing pure and mineral-rich salt.

[0024] Figure 1 is a drawing explaining each step of the present invention.

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. In describing embodiments of the present invention, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0026] Figure 1 is a drawing explaining each step of the present invention.

[0027] The present invention relates to a method for extracting salt from seawater, which comprises the steps of (a) collecting and storing seawater as a raw material for salt, (b) supplementing insufficient salinity of seawater, (c) sterilizing using far-infrared rays, (d) purifying seawater using bamboo charcoal, (e) reinforcing minerals, (f) removing bitterness using bamboo charcoal, (g) generating salt crystals in a salt-making furnace, (h) dehydrating to remove moisture, and (i) drying. Each step is described below.

[0028]

[0029] (a) Seawater intake and storage stage

[0030] This step involves extracting seawater, the raw material for salt production. It passes through a filtration tank to filter out impurities and is then stored in a seawater storage tank. The seawater is drawn in using a water intake pump from a location 5 meters below sea level.

[0031] The ocean is filled with a variety of impurities, both large and small. To remove these impurities, the collected seawater first passes through a filtration tank. This tank is equipped with a three-stage filtration system to remove impurities contained in the seawater. This three-stage filtration system can consist of a top layer of gravel, a layer of charcoal with a certain amount of space beneath it, and a sand layer with a certain amount of space beneath that.

[0032] First, seawater drawn from the ocean is fed into the filtration tank through the top inlet. As the seawater flows through the top of the tank, large impurities are removed by the gravel layer, while the charcoal layer adsorbs the impurities. Any impurities that pass through the charcoal layer are further filtered by the sand layer.

[0033] Seawater that has passed through the above filtration tank is transferred to a seawater storage tank. The seawater storage tank is made of yellow clay, and the seawater is aged in the seawater storage tank for 24 to 26 hours.

[0034] Loess is rich in antibiotic and antibacterial enzymes such as catalase, cikarase, and diphenoloxyrase, and has the effect of inhibiting bacterial activity and controlling humidity. Loess contains over 40% oxygen, which is more than twice the 20% oxygen contained in the general air layer, making it excellent for air circulation and purification, and has the effects of removing toxins, adsorption, and purification. It also contains a large amount of germanium, silica (SlO₂), alumina (Al₂O₃), magnesium (Mg), sodium (Na), and potassium (K).

[0035] Therefore, by aging seawater in a seawater storage tank made of yellow clay, it has the effect of removing toxicity from the seawater and purifying it, and the mineral components contained in the yellow clay are absorbed into the seawater, reducing the bitterness of the seawater and enriching its flavor.

[0036]

[0037] (b) Salt replenishment stage

[0038] Seawater typically has a salinity of 1-3%. This is insufficient for salt production, so supplementation is necessary to raise the salinity to 4-5%. This process involves adding sea salt to the seawater storage tank. The amount of sea salt added is 2-3% by weight relative to the total seawater stored in the tank. For example, 55-65 kg of sea salt is added per 3,000 liters of seawater.

[0039]

[0040] (c) Far infrared sterilization stage

[0041] Seawater contains harmful bacteria. The far-infrared sterilization process is designed to kill these harmful bacteria. To achieve far-infrared sterilization, seawater in a seawater storage tank is transferred to a far-infrared irradiation furnace.

[0042] Loess and biotite are used as far-infrared radiation sources. Loess, composed of silica, alumina, iron, magnesium, sodium, and potassium, emits large amounts of far-infrared rays when heated. Far-infrared rays have a photoelectric effect, activating cellular physiological processes and generating heat energy to release harmful substances.

[0043] First, place yellow clay inside the far-infrared ray radiator and heat it until the radiator reaches a temperature of 70 to 80 degrees Celsius. The yellow clay will emit far-infrared rays of 55 to 60 degrees Celsius, sterilizing harmful substances in the seawater. Yellow clay bricks can also be used. The far-infrared ray radiator is operated for 4 to 5 hours. If the far-infrared temperature is too low, there will be no sterilization effect, and if it is too high, even the minerals contained in the seawater can be destroyed, so it is important to maintain the appropriate temperature and time.

[0044] Additionally, loess radiates far-infrared rays and absorbs salt water, detoxifying seawater. The loess should be replaced every six months.

[0045] For far-infrared radiation, the bottom can be covered with biotite along with loess. Biotite is electrically neutral and contains potassium, magnesium, and other minerals, making it a useful food additive and skin treatment. Seawater contains calcium carbonate, which imparts a harsh, bitter taste and binds to microplastics. When biotite is laid down and heated during the far-infrared radiation phase, the calcium carbonate releases carbon dioxide and decomposes into oxides, effectively removing microplastics. This softens the seawater, making it softer and more pleasant to the touch.

[0046]

[0047] (d) Charcoal refining stage

[0048] Seawater sterilized in the far-infrared irradiation furnace is then transported to a charcoal purification plant. Charcoal absorbs various substances, further filtering out impurities not filtered by the filtration tank. It also has antibacterial properties. Furthermore, the charcoal releases beneficial minerals, adding minerals to the seawater.

[0049] In the charcoal purification process, 0.6 to 0.8 wt% of charcoal is added to the stored seawater, the purification furnace is heated for 4 to 5 hours, and the seawater temperature is maintained at 75 to 80°C.

[0050] If the temperature of the charcoal purifier is too low, the effect of mineral release and impurity adsorption will be reduced, and if it is too high, the minerals of the charcoal may be destroyed, so it is important to maintain the above temperature and time.

[0051]

[0052] (e) Mineral reinforcement stage

[0053] Seawater purified in a charcoal purification plant is transferred to a mineral enrichment reactor. Once the seawater is transferred to the mineral enrichment reactor, raw bamboo is cut at the node level and injected into the seawater. Raw bamboo is 2-3 years old, and live bamboo is used for jukyeo. Jukyeo refers to the white, thin membranous epithelium inside the bamboo. It contains puri components, amino acids, organic acids, and sugars, which inhibit staphylococcus and Pseudomonas aeruginosa. It is also rich in proteins (tyrosine, arginine, histidine, leucine) and fiber, which have the effect of reducing fever, stopping vomiting, and removing phlegm, and is therefore used as a medicinal herb in Oriental medicine. In order for the effective ingredients of jukyeo to be injected into the seawater, at least one direction of the bamboo must be cut toward the inside of the node, so that one end of the cut bamboo can form an inlet through which seawater can enter, allowing the ingredients of jukyeo to be injected into the seawater.

[0054] In the mineral enrichment process, live bamboo is added at a rate of 2-3% by weight of seawater, heated for 4-5 hours, and the seawater temperature is maintained at 75-85℃. This process reinforces the minerals contained in the bamboo while also softening the salt.

[0055]

[0056] (f) Bitterness removal step

[0057] The rough seawater from the mineral-refining furnace is then transported to a bamboo charcoal purification furnace. This furnace uses 20-30% by weight of bamboo charcoal relative to the seawater. After adding the bamboo charcoal, the seawater is heated for one hour, maintaining a temperature of 80-100°C. The seawater purified by the bamboo charcoal imparts a sweet and mild flavor to the salt.

[0058]

[0059] (g) Salt crystal formation stage

[0060] Seawater that has passed through a bamboo charcoal purification furnace is then transferred to a salt production furnace to produce salt crystals. In the furnace, the water is heated to temperatures between 150°C and 250°C for three to four hours. After three to four hours, the salt is stirred and maintained for at least an hour to prevent burning.

[0061] Salt produced through the above process produces 80 to 100 kg of salt when 1.5 to 2 tons of seawater is added.

[0062]

[0063] (h) Dehydration stage

[0064] Since the salt produced in the above-mentioned decontamination process still contains moisture, a process to remove this moisture is necessary. This moisture is removed using a centrifugal dehydrator.

[0065] Meanwhile, the water produced through the centrifugal dehydration process can be used as water salt. Water salt, a liquid salt solution, can be used for a variety of purposes, including beauty and therapeutic purposes, such as sauna use, eczema treatment, and atopic dermatitis treatment.

[0066]

[0067] (i) Drying stage

[0068] The salt, which has undergone the dehydration process, is transported to a yellow clay drying facility. After drying for 15 to 16 days, it is then transferred to a natural drying facility, where it is dried naturally in sunlight for at least a month.

[0069]

[0070] By going through the above refining and mineral enrichment processes, we can produce salt that is pure and clean, yet rich in various minerals.

[0071] Although the detailed description of the present invention has described specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims

1. (a) A step of collecting seawater from the sea, passing it through a filtration tank, and storing it in a seawater storage tank; (b) a step of replenishing salinity to the seawater; (c) A step of sterilizing the seawater with the above salinity supplemented by transferring it to a far-infrared ray irradiation furnace; (d) A step of purifying the sterilized seawater by transferring it to a charcoal purifier; (e) A step of transferring the purified seawater to a mineral reinforcement vessel to reinforce minerals; (f) A step of removing the bitterness of seawater by transferring the seawater supplemented with the above minerals to a bamboo charcoal purification furnace. (g) a step of transferring the seawater from which the bitterness has been removed to a salt desalination plant to produce salt crystals; (h) a step of transporting the salt crystals to a dehydrator and dehydrating them; (i) a step of transporting the dehydrated salt crystals to a drying facility and drying them; A method for producing mineral-rich salt, characterized by comprising:

2. In paragraph 1, A method for producing mineral-rich salt characterized in that the filter tank of step (a) forms a gravel layer in the upper layer, a charcoal layer in the middle layer, and a sand layer in the lower layer to remove impurities contained in seawater.

3. In paragraph 1, A method for producing mineral-rich salt, characterized in that in the step (a), the seawater storage tank is made of yellow clay, and the seawater stored in the seawater storage tank made of yellow clay is aged for 24 to 26 hours.

4. In paragraph 1, The above step (b) is a method for producing mineral-rich sea salt, characterized in that 2 to 3 wt% of sea salt is added relative to the amount of seawater stored in the seawater storage tank.

5. In paragraph 1, The above step (c) is a method for producing mineral-rich salt, characterized in that it comprises placing yellow earth and biotite inside with far-infrared radiation and applying heat for 4 to 5 hours while maintaining the seawater temperature at 70 to 80°C.

6. In paragraph 1, The above step (d) is a method for producing mineral-rich salt, characterized in that 0.6 to 0.8 wt% of charcoal relative to the weight of seawater is heated in a charcoal purification furnace for 4 to 5 hours while maintaining the seawater temperature at 70°C to 80°C.

7. In paragraph 1, The above step (e) is a method for producing mineral-rich salt, characterized in that it comprises cutting 2-3 year old living bamboo and putting it into a mineral-reinforced furnace and applying heat for 4-5 hours while maintaining the seawater temperature at 70℃ to 80℃.

8. In paragraph 7, A method for producing mineral-rich salt characterized in that the above-mentioned living bamboo is added in an amount of 2 to 3% by weight relative to the weight of seawater.

9. In paragraph 1, The above step (f) is a method for producing mineral-rich salt, characterized in that 20 to 30 wt% of bamboo charcoal is added to seawater in a bamboo charcoal purification furnace and heat is applied for 4 to 5 hours while maintaining the seawater temperature at 80°C to 100°C.

10. In paragraph 1, The above step (g) is a method for producing mineral-rich salt, characterized in that it generates salt crystals by applying heat of 150℃ to 250℃ for 4 to 5 hours in a salt making furnace.

11. In paragraph 1, The above step (i) is a method for producing mineral-rich salt characterized by drying in a yellow clay drying room for 15 to 16 days, then transferring to a natural drying room and drying naturally in natural light for more than one month.

Citation Information

Patent Citations

  • Manufacturing method of boiled salt

    KR101794548B1

  • omitted

    KR1020110009300A

  • Manufacturing Method Of Topping Salt And Topping Salt Manufactured By That Method

    KR1020130056689A

  • Manufacturing method of salicomia herbaceal - loess salt, and the salicomia herbaceal - loess salt by the method

    KR1020170051658A

  • Standing type overpass and flood prevention wall

    KR1020250030125A