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[Chemical Knowledge]：Manufacturing method and process of sodium sulfate

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The manufacturing method
of sodium sulfate
1. Introduction

sodium sulfate is a common chemical production raw material, widely used in glass, detergent, dye, medicine and other fields. This article will introduce the manufacturing method of sodium sulfate, including raw material preparation, reaction process, post-treatment and other process steps, aiming to provide readers with comprehensive knowledge of sodium sulfate production.

2. raw material preparation

1. sulfuric acid: industrial grade sulfuric acid, the concentration is generally 93%-98%.
2. sodium hydroxide: industrial grade sodium hydroxide, high purity. The production of sodium
sulfate
the 3. reaction process of

is mainly realized by the neutralization reaction of sulfuric acid and sodium hydroxide. The specific steps are as follows:

1. Dissolve sodium hydroxide in a certain amount of water to make sodium hydroxide solution.
2. Sulfuric acid is slowly added to the sodium hydroxide solution while stirring to allow the two to react fully.
3. A large amount of heat will be generated during the reaction. It is necessary to control the reaction temperature to avoid boiling and splashing of the solution.
4. The neutralization reaction generates sodium sulfate and water, and sodium sulfate will gradually precipitate.

4. Post-treatment

1. Filtration: The precipitated sodium sulfate was separated by filtration and the solid sodium sulfate was collected.
2. Washing: Washing sodium sulfate with a small amount of water to remove residual impurities on the surface.
3. Drying: The washed sodium sulfate is placed in a drying device and dried to obtain a dried sodium sulfate product.

5. precautions

1. Pay attention to safety during operation and avoid contact with sensitive parts such as skin and eyes due to sulfuric acid and sodium hydroxide.
2. Control the reaction temperature to avoid boiling and splashing of the solution.
3. In the process of filtering, washing and drying, keep the equipment clean and avoid product contamination. Summary of

6. The manufacturing method of

sodium sulfate is relatively simple, mainly through the neutralization reaction of sulfuric acid and sodium hydroxide. During the operation, pay attention to safety, control the reaction temperature, and keep the equipment clean to ensure product quality and production efficiency. Through the understanding and mastery of sodium sulfate manufacturing methods, it can provide useful reference and guidance for the field of chemical production.

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