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[Chemical Knowledge]：Production and manufacturing method and process flow of big soda

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Soda (sodium thiosulfate, Na2S2O3) is a common chemical raw material, widely used in photography, printing, medicine, textile and other industries. This article will introduce the manufacturing method of big soda.

1. Raw Material Preparation

The main raw materials for making soda include sodium hydroxide (NaOH), sulfur (S) and sodium sulfite (Na2SO3). In order to ensure the quality and purity of the product, it is necessary to choose high-quality raw materials and ensure that the ratio of raw materials is reasonable.

2. Reaction Principle The manufacturing process of

soda involves the following chemical reactions:

1. Sodium hydroxide reacts with sulfur to produce sodium polysulfide (Na2Sx):
NaOH S → Na2Sx H2O
2. Sodium polysulfide reacts with sodium sulfite to produce sodium thiosulfate (Na2S2O3) and sodium sulfate (Na2SO4):
Na2Sx Na2SO3 → Na2S2O3 Na2SO4

3. manufacturing process

soda manufacturing process mainly includes the following steps:

1. ingredients: according to the predetermined ratio, sodium hydroxide, sulfur and sodium sulfite into the reaction kettle.
2. melting: heating the reaction kettle, so that the raw materials melt, and fully mixed.
3. Reaction: Under the appropriate temperature and pressure, let the raw materials fully react to generate large soda.
4. Cooling crystallization: After the reaction is completed, the reaction kettle is cooled to precipitate soda crystals.
5. Centrifugation: The crystallized big soda was separated from the mother liquor by a centrifuge.
6. Drying: The separated large soda crystals are dried to obtain the final product.
Precautions for
4.

During the manufacturing process, the following items need to be paid attention to to ensure product quality and output:

1. Control the reaction temperature and pressure to ensure the smooth progress of the reaction.
2. Strictly monitor the quality and ratio of raw materials to avoid impurities entering the product.
3. Keep the equipment clean and prevent equipment failure from affecting production.
4. Regularly inspect and maintain the production process to ensure the stable operation of the production line.

5. product quality inspection

In order to ensure the quality of big soda products, strict quality inspection is required, including appearance, purity, pH value, heavy metal content and other indicators. For unqualified products, rework or scrap is required to ensure product quality and safety.

In short, the manufacturing process of big soda requires strict control of factors such as raw material quality, reaction conditions and operating processes to ensure product quality and output. At the same time, strict quality inspection is required to ensure the quality and safety of products.

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