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[Chemical Knowledge]：Production and manufacturing method and process flow of p-methyl anisole

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The manufacturing method
of methyl anisole
1. Introduction

of methyl anisole is an important raw material for the production of chemicals, widely used in medicine, pesticides, spices and other fields. Therefore, it is of great significance to study the manufacturing method of methyl anisole. This article will introduce a common method of manufacturing p-methyl anisole.

2. Materials and Equipment

1. Materials: p-methylphenol, sulfuric acid, methanol.
2. Equipment: reaction kettle, condenser, water separator, stirrer, thermometer, pH meter.

3. Manufacturing Steps

1. Add p-methylphenol into a reaction kettle, and then add an appropriate amount of sulfuric acid as a catalyst.
2. Start the stirrer, slowly add methanol dropwise, control the reaction temperature at 60-70 ° C., and divide water in time during the reaction.
3. After completion of the reaction, the reaction solution was cooled to room temperature and neutralized with alkali solution to neutrality.
4. The organic phase was separated, washed with water until neutral, and dried over anhydrous sodium sulfate.
5. Filtration and distillation to collect fractions of p-methyl anisole.

4. precautions

1. control the reaction temperature, avoid too high or too low.
2. In the process of water separation, water should be removed in time to avoid affecting the reaction.
3. The pH value should be controlled during the neutralization process to avoid over-acid or over-alkali.
4. Control the temperature and pressure during distillation to avoid product decomposition or impurity mixing.

5. conclusion

can produce p-methyl anisole by esterification of p-methyl phenol with methanol under the catalysis of sulfuric acid. The method is simple, high yield, suitable for industrial production. In the production process, attention should be paid to controlling the reaction conditions to ensure product quality.
The above
is a common manufacturing method of p-methyl anisole, and the specific operation process needs to be adjusted and optimized according to the actual situation. At the same time, in order to ensure the safety and environmental protection of the production process, it is also necessary to strictly abide by relevant laws and regulations, and strengthen production management and waste disposal. It is hoped that this paper can provide some reference and help for workers engaged in the field of chemical production.

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