Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process of picric acid

[Chemical Knowledge]：Production and manufacturing method and process of picric acid

Read： 592 Time：12months ago Source：Transform the World with Simplicity

picric acid manufacturing method

1. introduction

picric acid is an important chemical production of raw materials, widely used in medicine, dyes, explosives and other fields. Therefore, it is of great significance to study the manufacturing method of picric acid for improving production efficiency, reducing costs and improving product quality. This article will introduce the manufacturing method of picric acid, including raw material preparation, reaction process, post-treatment and so on.

2. Raw Material Preparation

The main raw materials for the manufacture of picric acid are phenol and nitric acid. In order to ensure the smooth progress of the reaction, it is necessary to mix phenol and nitric acid in a certain proportion, and add an appropriate amount of catalyst. At the same time, it is also necessary to carry out quality inspection of raw materials to ensure compliance with manufacturing requirements.

3. reaction process

1. nitration reaction

The mixed raw materials are added into the nitration reactor, and the nitration reaction is carried out at a certain temperature and pressure. Nitration reaction is a process in which the hydrogen atoms in phenol are replaced by nitro groups to generate nitrophenol.

2. Acidification Reaction
After the
nitration reaction is completed, nitrophenol is added into the acidification reactor, and an appropriate amount of sulfuric acid is added to carry out the acidification reaction. Acidification reaction is the process of converting nitro group in nitrophenol into carboxyl group to generate picric acid.

4. Post-treatment

1. Cooling crystallization

After the acidification reaction is completed, the reaction solution is cooled to a certain temperature to crystallize picric acid. At the same time, add an appropriate amount of preservatives to prevent product deterioration.

2. Centrifugation

The crystallized mixture is centrifuged to separate picric acid crystals and a mother liquor. Mother liquor can be recycled to reduce production costs.

3. Drying and packaging

The separated picric acid crystals are dried and then packaged to obtain the final product.
Precautions for
5.

1. In the manufacturing process, it is necessary to strictly control the temperature and pressure to ensure the smooth progress of the reaction. At the same time, the reaction equipment needs to be maintained and maintained to ensure the normal operation of the equipment.

2. In the post-processing process, it is necessary to pay attention to the quality and purity of the product to avoid the influence of impurities on the product. At the same time, it is necessary to properly dispose of waste to prevent environmental pollution.

6. Conclusion The manufacturing method of

picric acid includes raw material preparation, nitration reaction, acidification reaction and post-treatment. In the manufacturing process, it is necessary to strictly control the temperature and pressure to ensure the smooth progress of the reaction. At the same time, it is necessary to pay attention to the quality and purity of the product to avoid the influence of impurities on the product. Through continuous research and improvement of manufacturing methods, the production efficiency and quality of picric acid can be improved, and it can contribute to the development of chemical production field.

Previous： Production and manufacturing method and process flow of hydroquinone

Next： Production and manufacturing method and process flow of p-hydroxybenzoic acid

News Categories