Potassium persulfate (K2S2O8) is animportant 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: Potassiumpersulfate 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: Althoughthe 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 andlow 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 gradepotassium 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: Potassiumpersulfate is commonly used as a disinfectant and fabric bleach because of its strong oxidation.
2. Polymerization initiator: In thesynthetic 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 isused 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 metalprocessing, potassium persulfate is used in the oxidation solution of steel and alloys and the etching and coarsening treatment of copper.
5. Analytical reagents: In chemicalanalysis, 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 persulfateis used as an oxidant in organic synthesis for the synthesis of dyes, drugs and other chemicals.
7. Food industry: Food grade potassiumpersulfate 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 ofenvironmental 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 potassiumpersulfate 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.