Sodium ammonium potassium persulfate is an important raw material for the production of chemicals, which is widely used in redox reaction, bleaching, water treatment and other fields. This article will introduce the manufacturing method of sodium ammonium potassium persulfate, including raw material preparation, reaction process, post-treatment and other links.
I. Raw material preparation
The manufacture of potassium ammonium persulfate requires the preparation of the following raw materials: ammonium sulfate, potassium sulfate, hydrogen peroxide, sodium hydroxide. Among them, ammonium sulfate and potassium sulfate should be chemically pure reagents, hydrogen peroxide should be about 30% aqueous solution, and sodium hydroxide should be industrial grade or chemically pure reagent.
II. Reaction process
1. Reaction between ammonium sulfate and sodium hydroxide
Ammonium sulfate and sodium hydroxide are added into the reactor according to a certain proportion, and the temperature of the reaction is controlled to generate sodium sulfate and ammonia gas by the reaction. Constant stirring is required during the reaction to ensure a uniform reaction. After the reaction is completed, the reaction solution is filtered to remove the ammonia gas and insoluble matter generated.
2. Reaction of potassium sulfate with hydrogen peroxide
Potassium sulfate and hydrogen peroxide are added into another reactor in a certain ratio, and the reaction temperature is controlled to produce potassium persulfate and water. Constant stirring is also required during the reaction to avoid decomposition of hydrogen peroxide. After the reaction is completed, the reaction solution is filtered to remove insoluble matter.
3. Mixing reaction
Mix the sodium sulfate and potassium persulfate obtained from the above two reactions according to a certain proportion, add them into the reactor, control the reaction temperature and time, and the reaction generates potassium ammonium persulfate and water. Constant stirring is required during the reaction to ensure a uniform reaction. After the reaction is completed, the reaction solution is cooled to room temperature to obtain the crystallization of potassium ammonium peroxosulfate.
Third, post-treatment
The crystals will be filtered, washed and dried to obtain the finished product of potassium ammonium peroxosulfate. It should be noted that in the process of filtration and washing, contact between potassium ammonium peroxosulfate and water should be avoided to avoid hydrolysis reaction. Temperature and humidity should be controlled during the drying process to avoid the product caking or deterioration.
4. Precautions
1. In the whole manufacturing process, the quality and proportion of raw materials should be strictly controlled to ensure that the reaction generates the required sodium ammonium potassium persulfate.
2. The control of reaction temperature and time has great influence on product quality and yield, and should be adjusted and optimized according to the actual situation.
3. In the post-treatment process, it should be ensured that the purity and quality of the product meet the relevant standards and requirements.
In conclusion, the manufacturing method of sodium ammonium potassium persulfate involves several chemical reactions and operation steps, and it is necessary to strictly control the process parameters and operation points of each link to ensure the product quality and yield. Meanwhile, attention should be paid to safety and environmental protection in the production process to avoid harming the environment and personnel.
