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[Chemical Knowledge]：Manufacturing method and technological process of mannitol

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The manufacturing method
of mannitol
1. Introduction

Mannitol is a kind of chemical production raw material widely used in chemical industry, medicine, food and other fields, with high economic value and use value. Therefore, it is of great significance to study the manufacturing method of mannitol for improving product quality, reducing production costs and promoting industrial development. This article will introduce a common mannitol manufacturing method.

2. Materials and Equipment

1. Materials: glucose, sodium hydroxide, hydrochloric acid, activated carbon, etc.
2. Equipment: reaction kettle, centrifuge, filter, drying equipment, etc.

3. manufacturing method

1. glucose alkaline solution preparation: glucose is added to the reaction kettle, adding an appropriate amount of sodium hydroxide solution, stirring and heating to a certain temperature, the glucose is completely dissolved, the alkaline solution of glucose is obtained.
2. the formation of mannitol: a certain amount of hydrochloric acid is added to the alkaline solution of glucose to adjust the pH value, so that the isomerization reaction of glucose occurs under acidic conditions to generate mannitol.
3. Decolorization and filtration: Add an appropriate amount of activated carbon to the reaction solution, stir for a certain period of time and then filter to remove the pigment and impurities in the solution.
4. Crystallization and Centrifugation: The filtrate was cooled to a certain temperature to precipitate mannitol crystals, and then centrifuged to obtain mannitol crystals.
5. Washing and drying: The mannitol crystals are washed with a small amount of water to remove surface impurities, and then dried to obtain a pure mannitol product.
Precautions for
4.

1. During the operation, the reaction temperature and pH value should be strictly controlled to ensure the smooth progress of the reaction and the quality of the product.
2. The amount of activated carbon should be adjusted according to the color and impurity content of the solution to ensure the decolorization effect.
3. During the crystallization process, the cooling rate and temperature should be controlled to ensure the quality and yield of mannitol crystals.

5. conclusion

The mannitol manufacturing method introduced in this paper has the advantages of simple operation, easy availability of raw materials and high yield, and is suitable for industrial production. By strictly controlling the operating conditions and raw material quality, the quality and purity of mannitol products can be further improved to meet the needs of different fields. At the same time, safety management and environmental protection measures should be strengthened in the production process to ensure the safety and sustainability of the production process. In short, the research and development of mannitol manufacturing methods is of great significance for promoting the development of the chemical industry, improving product quality and reducing production costs.

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