Manufacturing Method of Sodium Naphthalene Acetate
I. Introduction
Sodium Naphthalene Acetate is an important raw material for the production of chemicals, which is widely used in the fields of pesticides, pharmaceuticals, dyes and so on. In this paper, we will introduce the manufacturing method of sodium naphthalene acetic acid, including raw material preparation, reaction process, and post-treatment.
II, raw material preparation
The main raw materials for manufacturing sodium naphthalene acetate are naphthalene and acetic acid. In order to ensure the quality and yield of the product, it is necessary to choose raw materials with high purity.
Third, 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 the acetylation reaction. The reaction generates naphthalene acetophenone and acetic acid.
2. Alkalization of naphthalene acetophenone: mix naphthalene acetophenone with aqueous sodium hydroxide, heat to a certain temperature, carry out the alkalization reaction. The reaction generates sodium naphthalene acetate and ethanol.
IV. Post-treatment
1. Cooling and crystallization: cool the reaction solution to a certain temperature, precipitate sodium naphthalene acetate crystals.
2. Filtration and washing: Filter the precipitated crystals and wash them with a small amount of water to get pure sodium naphthalene acetate.
3. Drying and packing: Dry the washed crystals and then pack them to get the final product of sodium naphthalene acetate.
V. Precautions
1. In the whole manufacturing process, the reaction temperature and time need to be strictly controlled to ensure the reaction and the quality of the product.
2. It is necessary to use raw materials with high purity to avoid the influence of impurities on the product.
3. In the post-treatment process, attention needs to be paid to controlling the crystallization temperature and the amount of washing water to ensure the purity and yield of the product.
VI.CONCLUSION
The manufacturing method of sodium naphthalene acetate includes raw material preparation, reaction process and post-treatment. In the whole manufacturing process, it is necessary to strictly control the process parameters to ensure the quality and yield of the product.
