Sodium Lienedisulfite, also known as insurance powder, is an important chemical raw material, widely used in textile, printing and dyeing, paper making, food and other industries. In this article, we will introduce the manufacturing method of sodium dithionite, including raw material preparation, reaction process, post-treatment and other aspects.
I. Raw material preparation
The main raw materials for manufacturing sodium dithionite are sodium hydroxide, sulfur dioxide and methanol. Among them, sodium hydroxide is used as an alkaline absorber, sulfur dioxide is used as a sulfur source, and methanol is used as a reducing agent and solvent. In order to ensure the quality and purity of the product, the raw materials need to be strictly quality controlled and screened.
II. Reaction process
The manufacturing process of sodium dithionite mainly includes the following steps:
1. Absorption: sodium hydroxide solution is reacted with sulfur dioxide gas to produce sodium sulfite.
2. Reduction: React sodium sulfite solution with methanol under acidic condition to produce sodium dithionite.
3. Crystallization: The reaction solution is cooled and crystallized to obtain sodium dithionite crystals.
4. Separation: Separate the crystals from the mother liquor to obtain a pure sodium dithionite product.
During the above reaction process, parameters such as reaction temperature, pH value, and raw material ratio need to be controlled to ensure the smooth progress of the reaction and the purity of the product. At the same time, the reaction equipment needs to be optimized and improved to improve the production efficiency and product quality.
Third, post-processing
The product of Sodium Lianodisulfite obtained from manufacturing needs to be post-processed, including drying, packaging, storage and other links. In order to ensure the quality and stability of the product, the post-treatment process needs to be strictly controlled and managed.
In conclusion, the manufacturing method of sodium conidiosulfite needs to take into account a number of aspects, such as raw material preparation, reaction process, post-treatment, etc., in order to ensure the quality and purity of the product. Meanwhile, it needs to continuously optimize the production process and improve the production efficiency to reduce the cost and improve the competitiveness of the enterprise.
