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[Chemical Knowledge]：Production and manufacturing method and process flow of sodium naphthalene acetate

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The manufacturing method
of sodium naphthalene acetate
1. Introduction

Sodium naphthalene acetate is an important chemical production raw material, widely used in pesticides, pharmaceuticals, dyes and other fields. This article will introduce the manufacturing method of sodium naphthalene acetate, including raw material preparation, reaction process, post-treatment and so on.

2. Raw Material Preparation

The main raw materials for the manufacture of sodium naphthalene acetate are naphthalene and acetic acid. In order to ensure the quality and yield of the product, it is necessary to select raw materials with higher purity.

3. reaction process

1. acetylation reaction of naphthalene: naphthalene and acetic acid are added into the reactor according to a certain proportion, heated to a certain temperature, and a catalyst is added to carry out acetylation reaction. The reaction produces naphthalene ethanone and acetic acid.
2. Alkalization reaction of naphthalene ethanone: the naphthalene ethanone is mixed with sodium hydroxide aqueous solution, heated to a certain temperature, and the alkalization reaction is carried out. The reaction produces sodium naphthalene acetate and ethanol.

4. post-treatment

1. cooling crystallization: the reaction solution is cooled to a certain temperature to precipitate sodium naphthalene acetate crystals.
2. Filtration and washing: The precipitated crystals were filtered and washed with a small amount of water to obtain relatively pure sodium naphthalene acetate.
3. Dry packaging: The washed crystals are dried and then packaged to obtain the final sodium naphthalene acetate product.

5. precautions

1. In the entire manufacturing process, it is necessary to strictly control the reaction temperature and time to ensure the progress of the reaction and the quality of the product.
2. It is necessary to use raw materials with higher purity to avoid the influence of impurities on the product.
3. In the post-treatment process, attention should be paid to controlling the crystallization temperature and the amount of washing water to ensure the purity and yield of the product.

6. conclusion The manufacturing method of

sodium naphthalene acetate includes raw material preparation, reaction process and post-treatment. In the entire manufacturing process, it is necessary to strictly control the process parameters to ensure product quality and output.

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