Ethyl Methacrylate Nitrile (EMA) is an important raw material for the production of chemicals, which is widely used in polymer synthesis, medicine, pesticide and other fields. The following is about the manufacturing method of Ethyl Methacrylate Nitrile:
I. Raw material preparation
1. Methacrylic acid: purity required ≥99%, as the main reactant.
2. Acetonitrile: purity requirement ≥99%, as reaction solvent and reactant.
3. Initiators: persulfate, azo compounds, etc., used to initiate the polymerization reaction.
II. Equipment preparation
Reaction equipment to be prepared includes: reactor, stirrer, thermometer, dropping funnel, reflux condenser and so on.
III. Manufacturing steps
1. Add methacrylic acid and acetonitrile into the reactor in a certain proportion and stir well.
2. While stirring, gradually add initiator to initiate the polymerization reaction.
3. Control the reaction temperature, generally in the range of 60-80 ℃ to maintain a stable reaction rate.
4. During the reaction, monitor the viscosity of the reaction solution and the monomer conversion rate in time to determine the reaction process.
5. At the end of the reaction, cool the reaction solution to room temperature, and then carry out post-treatment.
4. Post-treatment
1. Pour the reaction solution into a dispensing funnel, add an appropriate amount of water, and shake the dispensing funnel so that the aqueous phase and the organic phase come into full contact to wash away the remaining methacrylic acid and acetonitrile in the reaction solution.
2. After partitioning, the organic phase was collected and dried with anhydrous sodium sulfate to remove residual water.
3. The anhydrous sodium sulfate was removed by filtration and then the ethyl methacrylate nitrile fraction was collected by distillation.
V. Precautions
1. During operation, strictly observe laboratory safety procedures, wear protective gear to prevent exposure to toxic and hazardous chemicals.
2. Control the reaction temperature and stirring speed to ensure the smooth progress of the reaction.
3. In the post-treatment process, pay attention to removing residual water and other impurities to ensure the purity of the product.
The above is the manufacturing method of Ethyl Methacrylate Nitrile, through strict operating procedures and quality control, high quality Ethyl Methacrylate Nitrile products can be produced, which can provide important raw material guarantee for the production of chemical field.
