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The manufacturing method
of isobutyryl chloride
1. Introduction
isobutyryl chloride is an important chemical production raw material, widely used in medicine, pesticides, dyes, spices and other fields. Therefore, it is of great significance to study the manufacturing method of isobutyryl chloride. This article will introduce a common isobutyryl chloride manufacturing method.
2. Materials and Equipment
1. Materials: isobutyric acid, phosphorus trichloride, benzene, sodium hydroxide solution.
2. Equipment: reaction kettle, condenser, water separator, stirrer, thermometer, dropping funnel.
3. Manufacturing Methods
1. Add isobutyric acid to the reactor, turn on the stirrer, and maintain the appropriate stirring speed.
2. Slowly add phosphorus trichloride dropwise through the dropping funnel, and at the same time turn on the condenser to control the reaction temperature within a certain range.
3. After the dropwise addition is completed, continue stirring for a certain period of time to allow the reaction to proceed fully.
4. Slowly add benzene to the reaction kettle to reduce the viscosity of the system and play a role in dilution.
5. Separate the water and benzene formed in a water separator and collect the organic phase.
6. The organic phase is washed with sodium hydroxide solution to neutralize the acidic material.
7. Isobutyryl chloride was separated by distillation, and the product with higher purity was collected.
Precautions for
4.
1. Strictly control the reaction temperature to prevent too high or too low from affecting the reaction and product quality.
2. When adding phosphorus trichloride, it should be carried out slowly to avoid local overheating caused by too fast.
3. The water separator should drain water in time to prevent water from affecting the separation effect.
4. Distillation to control the distillation temperature and vacuum, to ensure product quality.
5. Conclusion
Through the manufacturing method described in this paper, a higher purity isobutyryl chloride product can be obtained. In the actual production process, the process parameters should be adjusted and optimized according to the specific situation to improve product quality and yield. At the same time, it is necessary to strengthen the management of safe production to ensure the smooth progress of the production process.