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[Chemical Knowledge]：Production and manufacturing method and process flow of antimony trioxide

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The manufacturing method
of antimony trioxide
1. Introduction

Antimony trioxide (Sb2O3) is an important chemical production raw material, widely used in plastics, ceramics, glass, pigments, flame retardants and other fields. This article will introduce the manufacturing method of antimony trioxide in detail, including raw material preparation, reaction process, post-treatment and other links.

2. Raw Materials Preparation

The main raw materials for the manufacture of antimony trioxide are metallic antimony (Sb) and an oxidizing agent. Metal antimony is usually supplied in the form of antimony ingot or antimony powder, and products with higher purity should be selected to ensure product quality. The oxidizing agent may be hydrogen peroxide (H2O2), oxygen (O2) or the like.

3. reaction process

1. Acid method: antimony metal reacts with dilute sulfuric acid to generate antimony sulfate, and then adds hydrogen peroxide to oxidize to generate antimony trioxide precipitate. The reaction equation is as follows:

Sb H2SO4 → SbSO4 H2 ↑
SbSO4 H2O2 → Sb2O3 ↓ H2SO4

2. Alkaline method: antimony metal reacts with sodium hydroxide to form sodium antimonite, which is then oxidized by oxygen to form antimony trioxide. The reaction equation is as follows:

Sb 2NaOH → Na2SbO2 H2 ↑
Na2SbO2 O2 → Sb2O3 ↓ NaOH

4. post-treatment

After the reaction is completed, filtration, washing, drying and other operations are carried out to obtain antimony trioxide products. In order to further improve the purity of the product, roasting treatment can be carried out to remove the residual moisture and organic matter.
Precautions for
5.

1. During operation, the reaction temperature and time should be strictly controlled to avoid excessive oxidation or reduction.
2. In the process of filtration and washing, impurity ions should be fully removed to avoid affecting product quality.
3. During the drying and roasting process, the temperature and time should be controlled to avoid product agglomeration or sintering.

6. conclusion

This paper introduces the manufacturing method of antimony trioxide, including raw material preparation, reaction process, post-treatment and so on. In the actual production process, the appropriate process parameters and operation methods should be selected according to 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.

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