Preparation method of high-purity sodium-calcium-magnesium single ionized water based on fluoride precipitation replacement

Abstract

The invention discloses a preparation method of medical-grade high-purity single ionized water based on fluoride bidirectional precipitation replacement, and belongs to the technical field of preparation of medical ionized water. According to the method, fluorine ions are taken as a carrier, and independent separation of sodium, calcium and magnesium ions and preparation of high-activity ionized water are realized through a three-step closed-loop replacement reaction: sodium fluoride reacts with metal calcium to generate calcium fluoride precipitate and pure sodium ionized water; replacing the calcium fluoride precipitate with magnesium metal to obtain magnesium fluoride precipitate and fluorine-free high-purity calcium ion water; and reacting the magnesium fluoride precipitate with metal calcium to generate recyclable calcium fluoride precipitate and pure magnesium ion water. The whole process is normal temperature and normal pressure, free of electrolysis, free of acid and alkali, free of by-products and free of fluorine ion closed-loop circulation emission, the obtained ionized water is in a free hydrated ion form, the purity reaches the medical level, and the ionized water can be independently used or compounded. The invention solves the problems of difficulty in preparing single ionized water, high energy consumption and insufficient purity in the traditional technology, and has the advantages of simple process, low cost, uniqueness and obvious patent barrier.

Description

Technical Field

[0001] This invention belongs to the field of high-purity ion water preparation technology, specifically relating to a method for independently, continuously, and with high purity preparing sodium ion water, calcium ion water, and magnesium ion water by utilizing stepwise precipitation replacement and fluoride closed-loop circulation. Background Technology

[0002] High-purity ionized water is widely used in medical, nursing, beauty, and health care fields. Traditional preparation methods such as electrolysis, ion exchange, and membrane separation suffer from problems such as incomplete ion separation, insufficient purity, high energy consumption, easy introduction of impurities, and inability to achieve single-ion directional preparation. Currently, there is a lack of an integrated preparation process that can achieve step-by-step precipitation and fluoride source recycling; this invention addresses this deficiency. Summary of the Invention

[0003] Purpose of the invention: To provide a method for preparing high-purity sodium, calcium, and magnesium single-ion water, solving the problems of impure ion separation, inability to prepare independently, high cost, and inability to recycle fluoride in existing technologies.

[0004] Technical Solution: A method for preparing high-purity sodium, calcium, and magnesium single-ion water based on fluoride precipitation and replacement, characterized by employing a three-stage stepwise precipitation method combined with a closed-loop fluoride cycle: 1. The calcium fluoride precipitate generated in the first-stage reaction is directly used as the raw material for the second-stage reaction; 2. The magnesium fluoride precipitate generated in the second-stage reaction is directly used as the raw material for the third-stage reaction; 3. The calcium fluoride precipitate generated in the third-stage reaction is refluxed to the second-stage reaction to achieve fluoride recycling; Through the stepwise collection of the above-mentioned precipitated materials, pure sodium ion water, pure calcium ion water, and pure magnesium ion water are obtained respectively. Beneficial effects

[0005] 1. It can independently prepare high-purity single sodium ion water, calcium ion water, and magnesium ion water without cross-interference; 2. The previous stage precipitate can be directly used as the raw material for the next stage, with a simple process and high conversion rate; 3. The fluoride closed-loop circulation has no loss and zero emission, which greatly reduces the cost; 4. The reaction is carried out at room temperature and pressure, which is safe and stable and suitable for industrial production. Detailed Implementation

[0006] 1. Preparation of pure sodium ionized water: Sodium fluoride is dissolved in pure water, and excess metallic calcium is added to carry out a displacement reaction: 2NaF + Ca → CaF₂↓ + 2Na + (Water); Fluorine reacts with calcium to form calcium fluoride precipitate. Filtration removes the precipitate and excess metallic calcium particles. The resulting clear liquid is fluorine-free, high-purity sodium ion water, with ions in a free hydrated form, which can be directly absorbed. The calcium fluoride precipitate proceeds to the next step.

[0007] 2. Preparation of pure calcium ion water: Collect the above calcium fluoride precipitate and add excess metallic magnesium to carry out a displacement reaction: CaF₂ + Mg → MgF₂↓ + Ca 2+ (Water); Fluorine is selectively bound to magnesium to form magnesium fluoride precipitate. Filtration removes the precipitate and excess metallic magnesium particles; the resulting clear liquid is fluorine-free, sodium-free, high-purity calcium ion water, free of hydroxides and carbonates, with biological activity far exceeding that of traditional calcium supplements. The magnesium fluoride precipitate proceeds to the next step.

[0008] 3. Preparation of pure magnesium ion water: Collect the above magnesium fluoride precipitate and add excess metallic calcium for reflux displacement: MgF₂ + Ca → CaF₂↓ + Mg 2+ (Water); Fluorine reforms into calcium fluoride precipitate, which enters the calcium ion water production process and can be recycled; the resulting clear liquid is high-purity magnesium ion water, which can be used alone or in trace amounts. The calcium fluoride precipitate enters the second step of the recycling process.

[0009] Fluoride closed-loop cycle: The calcium fluoride precipitate produced in the tertiary reaction is refluxed to the secondary reaction and continues to be used as a raw material for the preparation of calcium ion water, thus realizing the fluoride source cycle. This method does not introduce acids or alkalis, does not use electrolysis, and does not generate impurity ions. The resulting ion water has a purity reaching medical grade.

[0010] The core advantages of this invention are: 1. A truly single-ion system. Sodium, calcium, and magnesium ions are prepared independently and physically separated, and can be used individually or mixed in any proportion to achieve precise ion control, unlike low-end technologies on the market that cannot separate mixed ions. 2. Medical-grade high purity. Free of fluorine residue, heavy metals, acids, alkalis, organic matter, and byproducts. The ions are free hydrated ions, requiring no gastric acid dissociation, and can be directly absorbed and utilized by the human body. 3. Normal temperature and pressure, extremely low energy consumption. No heating, pressurization, electrolysis, or large-scale equipment is required. The reaction is mild and controllable, with high raw material utilization and negligible cost. 4. Closed-loop circulation, zero pollution. Fluorine is only used as an intermediate carrier, circulating and precipitating throughout the process, with no emissions, no loss, and no environmental pollution. 5. Extremely simple process, scalable. The process can be completed simply through displacement and filtration, suitable for continuous industrial production, with extremely high product consistency. Attached Figure Description

[0011] Figure 1 This is a flow chart of the high-purity sodium, calcium, and magnesium single-ion water preparation process based on fluoride precipitation replacement of the present invention. It shows the complete step-by-step precipitation replacement and fluoride closed-loop circulation process: the first-stage reaction generates calcium fluoride precipitate and prepares sodium ion water; the second-stage reaction uses the first-stage precipitation to generate magnesium fluoride precipitate and prepares calcium ion water; and the third-stage reaction uses the second-stage precipitation to generate magnesium ion water and returns it to the second-stage reaction through a fluoride circulation pipeline.

[0012] Figure 2This is a schematic diagram of the high-purity sodium-calcium-magnesium single-ion water preparation system of the present invention, showing the connection relationship and composition of the primary reaction tank, primary precipitation separation tank, secondary reaction tank, secondary precipitation separation tank, tertiary reaction tank, tertiary precipitation separation tank, water storage tanks, and fluoride circulation pipeline.

Claims

1. A method for preparing high-purity sodium-calcium-magnesium single-ion water based on fluoride precipitation and displacement, characterized in that, include: The calcium fluoride precipitate produced in the first-order reaction is directly used as a raw material for the second-order reaction; The magnesium fluoride precipitate generated in the second-order reaction is directly used as a raw material for the third-order reaction; The calcium fluoride precipitate generated in the third-stage reaction is refluxed to the second-stage reaction for recycling. Through stepwise sedimentation, pure sodium ion water, pure calcium ion water, and pure magnesium ion water are obtained respectively.

2. The method according to claim 1, characterized in that, The first-order reaction is a displacement reaction between sodium fluoride and metallic calcium, producing calcium fluoride precipitate and sodium ion water.

3. The method according to claim 1, characterized in that, The second-order reaction is a displacement reaction between calcium fluoride precipitate and metallic magnesium, producing magnesium fluoride precipitate and calcium ion water.

4. The method according to claim 1, characterized in that, The tertiary reaction involves a displacement reaction between magnesium fluoride precipitate and metallic calcium, producing calcium fluoride precipitate and magnesium ion water.

5. The method according to any one of claims 1-4, characterized in that, All reactions were carried out at room temperature and pressure.

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