CN-121990664-A - Preparation method of high-purity sodium calcium magnesium single-ion water based on fluoride precipitation displacement

Abstract

The invention discloses a preparation method of medical grade high-purity single ionized water based on fluoride bidirectional precipitation displacement, belonging to the technical field of medical ionized water preparation. The method takes fluoride ions as carriers, and realizes independent separation of sodium, calcium and magnesium ions and preparation of high-activity ionized water through three-step ring-closing displacement reaction, wherein sodium fluoride and metal calcium react to generate calcium fluoride precipitate and pure sodium ionized water, calcium fluoride precipitate and metal magnesium are displaced to obtain magnesium fluoride precipitate and fluorine-free high-purity calcium ionized water, and magnesium fluoride precipitate and metal calcium react to generate recyclable calcium fluoride precipitate and pure magnesium ionized water. The invention has the advantages of no electrolysis, no acid or alkali and no byproducts in the whole process at normal temperature and normal pressure, no discharge of fluorine ions in a closed loop circulation way, and the obtained ionized water is in a free hydrated ion form, has the purity reaching the medical grade, and can be used independently or compounded. The invention solves the problems of difficult preparation of single ionized water, high energy consumption and insufficient purity in the traditional technology, has simple process and low cost, and has uniqueness and obvious patent barriers.

Inventors

• CHEN HONGYIN
• CHEN XUELIAN
• CHEN QINGLIAN
• CHEN HONGZHEN

Assignees

• 新疆顺安众达交通技术服务有限公司

Dates

Publication Date

20260508

Application Date

20260321

Claims (5)

1. 1. The preparation method of the high-purity sodium calcium magnesium single-ion water based on fluoride precipitation displacement is characterized by comprising the following steps of: the calcium fluoride precipitate generated by the primary reaction is directly used as the raw material of the secondary reaction; The magnesium fluoride precipitate generated by the second-stage reaction is directly used as the raw material of the third-stage reaction; The calcium fluoride precipitate generated by the third-stage reaction is refluxed to the second-stage reaction for recycling; and respectively obtaining pure sodium ion water, pure calcium ion water and pure magnesium ion water through gradual precipitation and bearing.
2. 2. The method of claim 1, wherein the primary reaction is a displacement reaction of sodium fluoride with calcium metal to produce calcium fluoride precipitate and sodium ion water.
3. 3. The method of claim 1, wherein the secondary reaction is a displacement reaction of calcium fluoride precipitate with magnesium metal to produce magnesium fluoride precipitate and calcium ion water.
4. 4. The method of claim 1, wherein the tertiary reaction is a displacement reaction of magnesium fluoride precipitate with metallic calcium to produce calcium fluoride precipitate and magnesium ion water.
5. 5. The process according to any one of claims 1 to 4, wherein all reactions are carried out at normal temperature and pressure.

Description

Preparation method of high-purity sodium calcium magnesium single-ion water based on fluoride precipitation displacement Technical Field The invention belongs to the technical field of high-purity ionized water preparation, and particularly relates to a method for realizing independent, continuous and high-purity preparation of sodium ion water, calcium ion water and magnesium ion water by utilizing gradual precipitation displacement and fluoride closed-loop circulation. Background The high-purity ionized water is widely applied to the fields of medical treatment, nursing, beauty treatment, health care and the like. The traditional preparation methods such as an electrolytic method, an ion exchange method and a membrane separation method have the problems of incomplete ion separation, insufficient purity, high energy consumption, easy impurity introduction, incapability of realizing single ion directional preparation and the like. In the prior art, an integrated preparation process capable of carrying out step by step through precipitation and recycling fluorine sources is lacking, and the invention is obtained. Disclosure of Invention The invention aims to provide a preparation method of high-purity sodium, calcium and magnesium single-ion water, which solves the problems that ion separation is impure, independent preparation cannot be carried out, the cost is high and fluoride cannot be recycled in the prior art. The technical scheme is that the preparation method of the high-purity sodium-calcium-magnesium single ionized water based on fluoride precipitation displacement is characterized by adopting a three-stage step-by-step precipitation receiving mode and matching fluoride closed-loop circulation, wherein 1, calcium fluoride precipitate generated by primary reaction is directly used as a raw material of secondary reaction, 2, magnesium fluoride precipitate generated by secondary reaction is directly used as a raw material of tertiary reaction, 3, calcium fluoride precipitate generated by tertiary reaction is refluxed to the secondary reaction to realize fluorine circulation; And (3) respectively obtaining pure sodium ion water, pure calcium ion water and pure magnesium ion water through gradual receiving of the precipitation materials. Advantageous effects 1. The method can be used for independently preparing high-purity single sodium ion water, calcium ion water and magnesium ion water without cross interference, wherein 2, the previous-stage sediment is directly used as the next-stage raw material, the process is simple, the conversion rate is high, 3, the fluoride is circulated in a closed loop, the loss is avoided, the emission is zero, the cost is greatly reduced, and 4, the reaction is carried out at normal temperature and normal pressure, the method is safe and stable, and is suitable for industrial production. Detailed Description 1. Preparing pure sodium ion water: dissolving sodium fluoride in pure water, adding excessive metal calcium to perform substitution reaction, wherein the reaction comprises 2NaF+Ca- & gtCaF 2 ↓+ 2Na+ (water), forming calcium fluoride precipitate by fluorine and calcium, filtering to remove precipitate and excessive metal calcium particles, and obtaining clear liquid which is fluorine-free and high-purity sodium ion water, wherein ions are in a free hydration form and can be directly absorbed. The calcium fluoride precipitates into the next step. 2. Preparing pure calcium ion water: Collecting the calcium fluoride precipitate, adding excessive metal magnesium for substitution reaction, wherein CaF 2+ Mg → MgF2↓ + Ca2+ (water) is added, fluorine is selectively combined by magnesium to form magnesium fluoride precipitate, the precipitate and excessive metal magnesium particles are removed by filtration, and the obtained clear liquid is fluorine-free, sodium-free and high-purity calcium ion water, hydroxide-free and carbonate-free, and the biological activity is far higher than that of the traditional calcium supplementing preparation. The magnesium fluoride precipitates into the next step. 3. Preparing pure magnesium ion water: Collecting the magnesium fluoride precipitate, adding excessive metal calcium for reflux replacement, wherein MgF 2+ Ca → CaF2↓ + Mg2+ (water) is added, fluorine reforms into calcium fluoride precipitate, and the calcium fluoride precipitate enters a calcium ion water production process for recycling, and the obtained clear liquid is high-purity magnesium ion water and can be used independently or compounded in trace amount. And (3) the calcium fluoride precipitate enters a second step for cyclic production. And (3) fluoride closed loop circulation, namely, refluxing calcium fluoride precipitate generated by the three-stage reaction to the second-stage reaction, and continuously serving as a raw material for preparing calcium ion water to realize fluorine source circulation. The method does not introduce acid and alkali in the whole process, doe