Manufacturing method of isopropanolamine
Isopropanolamine is an important organic chemical raw material, which is widely used in the fields of cleaning agent, antifreeze, printing and dyeing auxiliary agent, antistatic agent, scale inhibitor, corrosion inhibitor and so on. This article will introduce the manufacturing method of isopropanolamine.
I. Manufacturing principle
Isopropanolamine is produced by the addition reaction between ammonia and acryl alcohol under the action of catalyst. The reaction equation is as follows:
NH3 + CH3CHOHCH3 → CH3CH2NHCH2CH3 + H2O
II. Manufacturing process
The manufacturing process of isopropanolamine mainly consists of the following steps:
1. Catalyst preparation
Selecting the appropriate catalyst is the key to the manufacture of isopropanolamine. Commonly used catalysts are acidic catalysts and basic catalysts. Among them, acidic catalysts are commonly used such as sulfuric acid and phosphoric acid, and alkaline catalysts are commonly used such as sodium hydroxide and potassium hydroxide. The preparation of catalysts needs to be adjusted according to the specific reaction conditions and raw materials.
2. Raw material proportioning
Ammonia and acryl alcohol are proportioned according to a certain molar ratio, and generally ammonia is slightly excessive to ensure that the reaction proceeds.
3. Charging and Reaction
Add the proportioned raw materials into the reactor and carry out the reaction under a certain temperature and pressure. The reaction temperature and pressure need to be controlled during the reaction to ensure the smooth progress of the reaction.
4. Separation and purification
After the reaction is finished, the reaction solution needs to be separated and purified to obtain the isopropanolamine product with higher purity. Commonly used separation methods include distillation, extraction, crystallization and so on.
3. Precautions
1. The selection of catalyst needs to be adjusted according to the specific reaction conditions and raw materials to ensure the catalytic effect.
2. The ratio of raw materials needs to be strictly controlled to ensure the reaction and the quality of products.
3. The reaction temperature and pressure need to be controlled within the appropriate range to ensure the smooth progress of the reaction and the quality of the product.
4. The separation and purification process needs to pay attention to the purity and yield of the product in order to improve economic efficiency.
4. Environmental protection and safety
The manufacturing process of isopropanolamine needs to pay attention to environmental protection and safety issues. The wastewater and exhaust gas produced in the reaction process need to be treated to meet the environmental requirements. At the same time, the production process needs to strictly comply with the safety operating procedures to ensure the safety of employees and equipment.
In short, the manufacturing method of isopropanolamine needs to be adjusted according to the specific reaction conditions and raw materials to ensure the quality of the product and the economic benefits of production. At the same time, environmental protection and safety issues need to be fully emphasized to ensure the sustainability and safety of the production process.
