Manufacturing method of sodium benzoate
Sodium benzoate is an important raw material for chemical production, widely used in food, medicine, chemical and other fields. In this article, we will introduce the manufacturing method of sodium benzoate, including raw material preparation, reaction process, and post-treatment.
I. Raw material preparation
The main raw materials for manufacturing sodium benzoate are benzoic acid and sodium hydroxide. Benzoic acid can be obtained through petrochemical, coal chemical and other ways, while sodium hydroxide can be produced through electrolysis of brine and other methods. Before preparing sodium benzoate, quality inspection and purity control of raw materials are needed to ensure the quality and stability of the final product.
II. Reaction process
The manufacturing process of sodium benzoate is a process of acid-base neutralization reaction. Specifically, benzoic acid and sodium hydroxide are mixed according to a certain molar ratio, and the reaction temperature and time are controlled, so that benzoic acid and sodium hydroxide fully react to produce sodium benzoate and water. During the reaction process, attention needs to be paid to controlling the reaction speed and pH value to avoid the generation of by-products and product loss.
Third, post-treatment
After the reaction is finished, the reaction solution needs to be post-treated to obtain pure sodium benzoate product. The post-treatment process includes filtration, washing and drying. Among them, filtration is to remove impurities and by-products in the reaction solution, washing is to further remove impurities on the surface of the product, and drying is to obtain dry sodium benzoate product. In the post-treatment process, attention needs to be paid to controlling the operating conditions and product quality in order to avoid product loss and quality degradation.
4. Precautions
In the process of manufacturing sodium benzoate, the following matters need to be paid attention to:
1. Control the quality and purity of raw materials to avoid the influence on the final product quality;
2. Control the reaction temperature and time to avoid the generation of by-products and loss of products;
3. Control the conditions of post-processing to ensure the quality and purity of the product;
4. Pay attention to the safety of the production and the environmental protection requirements, and comply with the relevant laws and regulations and standards.
In short, the manufacturing method of sodium benzoate needs to pay attention to the operating conditions and product quality control in the preparation of raw materials, reaction process and post-treatment to ensure the quality and stability of the final product. At the same time, it needs to comply with relevant laws, regulations and standards to ensure safe production and environmental protection requirements.
