Diethyl alcohol monoisopropanolamine (DEIPA) is an important raw material for the production of chemicals, which is widely used in lubricants, detergents, preservatives, antioxidants and other fields. In this paper, we will introduce a common manufacturing method of diethanol monoisopropanolamine.
I. Raw materials and equipment
1. Raw materials: ethanolamine, isopropanol, sodium hydroxide.
2. Equipment: reaction kettle, stirrer, thermometer, condenser, dispensing funnel, centrifuge, etc.
2. Manufacturing steps
1. Add ethanolamine and isopropanol into the reactor in a certain proportion and stir well.
2. During the stirring process, slowly add sodium hydroxide solution to adjust the pH to the desired range.
3. Heat the reactor to maintain a certain temperature for the esterification reaction.
4. Monitor the pH and temperature of the reaction solution during the reaction and adjust as necessary.
5. After the end of the reaction, cool the reaction solution and carry out post-treatment.
3. Post-treatment steps
1. Pour the reaction solution into a liquid separating funnel and let it stand for stratification.
2. Separate the upper liquid and wash with distilled water until neutral.
3. The lower liquid was centrifuged to obtain the crude product of diethanol monoisopropanolamine.
4. The crude product is subjected to refining, such as distillation, crystallization and other steps, to obtain the product of diethanol monoisopropanolamine with higher purity.
4. Precautions
1. Pay attention to safety during operation and avoid contacting alkaline substances and high temperature liquid.
2. Strictly control the reaction temperature and pH value to ensure the smooth progress of the reaction.
3. The quality of the product should be ensured in the post-treatment process to avoid the introduction of impurities.
V. Yield and product quality
The yield and product quality of this manufacturing method are related to the quality of raw materials, operating conditions and post-treatment process. In the actual production process, it should be optimized and adjusted according to the specific conditions to improve the yield and product quality.
In conclusion, this paper describes a common manufacturing method of diethanol monoisopropanolamine, including aspects of raw materials and equipment, manufacturing steps, post-treatment steps and precautions. By mastering this method, it can provide high-quality diethanol monoisopropanolamine raw materials for the field of chemical production and promote the development of related industries. In the actual production process, it also needs to be optimized and improved according to the specific needs and conditions in order to improve the production efficiency and economic benefits. Meanwhile, in order to ensure the quality and safety of the products, the relevant regulations and standards should be strictly complied with, and the quality control and safety management in the production process should be strengthened.
