Manufacturing method of antimony trioxide
I. Introduction
Antimony trioxide (Sb2O3) is an important raw material for the production of chemicals, which is widely used in the fields of plastics, ceramics, glass, pigments, flame retardants and so on. In this paper, the manufacturing method of antimony trioxide will be introduced in detail, including raw material preparation, reaction process, and post-treatment.
II, raw material preparation
The main raw materials for manufacturing antimony trioxide are metallic antimony (Sb) and oxidizing agent. Antimony metal is usually supplied in the form of antimony ingots or antimony powder, and should be selected to ensure the quality of products with high purity. Oxidizing agent can choose hydrogen peroxide (H2O2), oxygen (O2) and so on.
Three, the reaction process
1. Acid method: antimony metal reacts with dilute sulfuric acid to generate antimony sulfate, and then adds hydrogen peroxide to oxidize, generating antimony trioxide precipitate. The reaction equation is as follows:
Sb + H2SO4 → SbSO4 + H2↑
SbSO4 + H2O2 → Sb2O3↓ + H2SO4
2. Alkali method: antimony metal reacts with sodium hydroxide to generate sodium antimonite, and then oxidized by oxygen to generate antimony trioxide. The reaction equation is as follows:
Sb + 2NaOH → Na2SbO2 + H2↑
Na2SbO2 + O2 → Sb2O3↓ + NaOH
Four, post-processing
After the end of the reaction, filtration, washing, drying and other operations, to obtain antimony trioxide products. In order to further improve the purity of the product, it can be roasted to remove the residual moisture and organic matter.
V. Precautions
1. During the operation, the reaction temperature and time should be strictly controlled to avoid excessive oxidation or reduction.
2. In the process of filtration and washing, it should be ensured that impurity ions are sufficiently removed to avoid affecting product quality.
3. During drying and roasting, the temperature and time should be controlled to avoid agglomeration or sintering of the product.
VI.CONCLUSION
This paper describes the manufacturing method of antimony trioxide, including the preparation of raw materials, the reaction process, post-treatment and other links. In the actual production process, suitable process parameters and operation methods should be selected according to the specific conditions and needs to ensure product quality and production efficiency. At the same time, safety management and environmental protection measures in the production process should be strengthened to ensure the smooth progress of the production process and minimize the impact on the environment.
