Aminocyclic acid is an important raw material for the production of chemicals, which is widely used in the fields of pharmaceuticals, pesticides, dyes and so on. In this article, we will introduce the manufacturing method of Aminocyclic Acid, including raw material preparation, reaction steps, post-treatment and so on.
I. Raw material preparation
The following raw materials are needed for the manufacture of aminocyclic acid: aniline, sodium cyanide, sulfuric acid, sodium nitrite, sodium hydroxide. Among them, aniline and sodium cyanide are the main raw materials, sulfuric acid is used to adjust the pH of the reaction system, sodium nitrite is used to oxidize the reaction, and sodium hydroxide is used to neutralize the reaction.
II. Reaction steps
1. Reaction of aniline and sodium cyanide to generate benzonitrile
Aniline and sodium cyanide were added to the reactor, heated to a certain temperature and stirred for a certain time to generate benzonitrile. This reaction is exothermic, and the reaction temperature needs to be controlled to avoid overheating and causing accidents. Benzonitrile reacts with sulfuric acid to form benzonitrile sulfonic acid
Benzonitrile is added to sulfuric acid, heated to a certain temperature and stirred for a certain period of time to form benzonitrile sulfonic acid. This reaction is exothermic and the reaction temperature needs to be controlled to avoid accidents caused by overheating.
3. Benzonitrile sulfonic acid reacts with sodium nitrite to generate diazobenzenesulfonic acid
Benzonitrile sulfonic acid and sodium nitrite are added to a reactor, controlled to a certain temperature and pH value, stirred for a certain time to generate diazobenzenesulfonic acid. The reaction is exothermic and the resulting diazonium salt is explosive, requiring strict control of the reaction conditions.
4. Diazobenzenesulfonic acid reacts with sodium hydroxide to form aminocyclic acid
Diazobenzenesulfonic acid and sodium hydroxide are added to a reactor, a certain temperature and pH are controlled, and the reaction is stirred for a certain period of time to form aminocyclic acid. The reaction is exothermic, and the reaction temperature needs to be controlled to avoid accidents caused by overheating.
Three, post-treatment
After the reaction, the reaction solution needs to be post-treated, including pH adjustment, extraction, crystallization, drying and other steps, in order to obtain amino-cyclic acid products with high purity. At the same time, waste liquid, waste gas and other wastes need to be treated to avoid pollution of the environment.
4. Precautions
1. Strict control of the reaction temperature and pH value is needed throughout the manufacturing process to avoid accidents and lower product quality.
2. The reaction equipment and pipeline need to be regularly maintained and inspected to ensure normal operation of the equipment and stable product quality.
3. Operators need to have relevant knowledge and skills, and strictly follow the operating procedures and safety regulations to ensure the safety and smoothness of the production process.
In short, the manufacturing method of aminocyclic acid needs to strictly control the reaction conditions and post-treatment process to ensure product quality and production safety. Meanwhile, the treatment of waste water, waste gas and other wastes needs to be strengthened to protect the environment.
