Basic Information:

Product name: Potassium persulfate
CAS NO.: 7727-21-1
MF: K2O8S2
Molecular weight: 270.31

Packaging:  

Potassium persulfate (K2S2O8) is an important inorganic compound with strong oxidizing properties and is widely used in many fields. The following is a detailed introduction to the preparation method and application field of potassium persulfate:

Preparation method
1. Potassium sulfate method: Potassium persulfate can be prepared by the double decomposition reaction of potassium sulfate and ammonium sulfate. First of all, ammonium sulfate and sulfuric acid are prepared into an electrolyte to remove impurities and then electrolyzed to generate persulfate, and then react with ammonium sulfate to generate ammonium persulfate, and then add potassium sulfate for double decomposition reaction, after cooling, separation, crystallization and drying, potassium persulfate is prepared.

2. Ammonium persulfate process: Although the specific steps of the ammonium persulfate process are not described in detail in the search results, it is a known method for preparing potassium persulfate. The method usually involves the reaction of ammonium persulfate with potassium sulfate, and potassium persulfate is generated through appropriate chemical reaction conditions and steps.

3. Preparation method of high purity and low nitrogen potassium persulfate: This is a relatively new preparation method of environmentally friendly grade potassium persulfate. The general steps of the method are as follows: adding distilled water and potassium persulfate into a pressure vessel for vacuum distillation; The solution is then poured into a crystallizing tank for cooling and crystallization.

4. Production process of industrial grade potassium persulfate: there are two main ways to produce industrial grade potassium persulfate in China, one is the traditional electrolysis method; The other is the use of wet method to obtain high purity single crystal products. These methods can be selected and optimized for different industrial needs and application scenarios.

Application field

1. Disinfectants and bleach: Potassium persulfate is commonly used as a disinfectant and fabric bleach because of its strong oxidation.

2. Polymerization initiator: In the synthetic resin and synthetic rubber industry, potassium persulfate is used as the initiator of emulsion polymerization, especially in the emulsion polymerization of butadiene-styrene (BS).

3. Water treatment: Potassium persulfate is used as an oxidizing agent in the field of water treatment, for cleaning, micro-etching and electroplating processes, and as a rubber breaker for oil well fracturing fluids.

4. Metal etching: In the field of metal processing, potassium persulfate is used in the oxidation solution of steel and alloys and the etching and coarsening treatment of copper.

5. Analytical reagents: In chemical analysis, potassium persulfate is used as an analytical reagent, such as the determination of manganese content in steel analysis, and the removal agent of sodium thiosulfate in film printing.

6. Chemical synthesis: Potassium persulfate is used as an oxidant in organic synthesis for the synthesis of dyes, drugs and other chemicals.

7. Food industry: Food grade potassium persulfate is used as a wheat modifier, brewer's yeast anti-mold, and as a free radical producer in polyacrylamide gel electrophoresis (PAGE).

8. Environmental science: In the field of environmental science, potassium persulfate is used in advanced oxidation processes to degrade contaminants in water by generating active species such as sulfate radicals.

In summary, the preparation method of potassium persulfate is relatively mature, and its application fields are wide, involving disinfection, bleaching, polymerization, electrolytic hydrogen peroxide, metal etching, analytical reagents, water treatment and soil remediation. With the development of technology and changes in market demand, the application of potassium persulfate may be further expanded and deepened.

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