Pearl Soda, also known as sodium hydroxide or caustic soda, is an important inorganic chemical raw material, which is widely used in paper making, printing and dyeing, chemical industry, metallurgy, medicine and other fields. The following will introduce the manufacturing method of bead soda.
I. Brine preparation
1. Preparation of brine
Salt is added to purified water and prepared into saturated brine. In order to ensure the quality of brine, the salt needs to be screened to remove impurities.
2. Refining of brine
The brine is filtered, degassed and tempered to remove impurities and gases and provide qualified raw materials for the electrolysis process.
II. Electrolysis process
1. Preparation of electrolysis tank
The electrolysis tank is made of materials such as nickel or stainless steel, and the tank is equipped with a diaphragm or an ion-exchange membrane to prevent chlorine and hydrogen from mixing and causing an explosion.
2. Electrolysis operation
Refined brine is passed into the electrolyzer, and direct current is passed in for electrolysis. Chlorine gas is produced at the anode and hydrogen gas and sodium hydroxide solution at the cathode.
3. Separation of alkali solution and chlorine gas
Sodium hydroxide solution and chlorine gas are separated by the action of diaphragm or ion exchange membrane. The sodium hydroxide solution is concentrated, crystallized and centrifuged to get the finished product of bead alkali.
III. Finished product treatment and packaging
1. Finished product treatment
The obtained bead alkali finished product needs to be tested to ensure its quality meets the relevant standards.
2. Packing
Qualified bead alkali finished products are packed, usually using plastic bags or plastic drums and other packaging materials to ensure the quality of the product in the transportation and storage process.
4. Precautions
1. In the manufacturing process, safety operation regulations need to be strictly observed to ensure the safety of employees and equipment.
2. For the waste gas and waste water produced, strict environmental protection treatment is required to ensure that the discharge is up to standard.
In short, the manufacture of bead alkali needs to go through many processes such as brine preparation, electrolysis, finished product treatment and packaging, etc. The production process needs to strictly observe the safety and environmental protection requirements to ensure product quality and production safety.
