The preparation process of electronic-grade periodate and potassium iodide involves several key steps and specific chemical methods. The detailed process is as follows: 

Preparation of electronic-grade periodate 

Method 1: By using an exchange agent for heating and evaporation 

Method 2: Through the reaction of nitric acid with barium peroxodisulfate 

Preparation of electronic-grade potassium iodide 

Method One: Restoration Method 

Method 2: Iron filings method 

Method Three: Neutralization Method 

Method Four: Sulfide Method 

Notes:

During the preparation process, the reaction temperature and time should be strictly controlled to ensure a complete reaction. 

Use high-purity raw materials to ensure product quality. 

During the operation, safety should be paid attention to and contact with the skin or inhalation of the related substances should be avoided. 

After the preparation is completed, the equipment should be cleaned and maintained to ensure its readiness for the next use. 

The above describes the preparation process of electronic-grade peroxiodisulfuric acid and potassium iodide. The specific operating parameters may need to be adjusted according to the actual situation. 

For many years, Wuhan Bona has been dedicated to the application process development of membrane separation technology. By integrating processes, membranes and equipment, it has accumulated rich experience in product purification and engineering-scale expansion. It not only solves manufacturing challenges but also improves product quality, and together with customers, it enhances the technical level of the industry.