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[Chemical Knowledge]：Production method and process of polycarbonate resin

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Manufacturing method
of polycarbonate resin
1. Introduction

Polycarbonate resin (Polycarbonate, referred to as PC) is a high-performance engineering plastic with excellent mechanical properties, optical properties, electrical properties and thermal properties. It is widely used in automotive, electrical and electronic, construction, medical equipment and other fields. This article will introduce the manufacturing method of polycarbonate resin in detail.

2. raw materials and formula

polycarbonate resin manufacturing raw materials mainly include bisphenol A, diphenyl carbonate, sodium hydroxide and so on. Among them, bisphenol A and diphenyl carbonate are monomers for synthesizing polycarbonate, and sodium hydroxide is used as a catalyst.

3. manufacturing process

polycarbonate resin manufacturing process mainly includes the following steps:

1. ingredients: according to a certain proportion of bisphenol A, diphenyl carbonate and sodium hydroxide into the ingredients tank, fully stirred evenly.
2. Polymerization: The mixture in the batch tank is transferred to the polymerization reactor, and the polymerization reaction is carried out at a certain temperature and pressure to generate a polycarbonate resin.
3. Post-treatment: After the polymerization reaction, the resulting polycarbonate resin is subjected to post-treatment, including devolatilization, granulation, drying and the like, to obtain a final product.

4. key technology and operation points

1 ingredients: to ensure the quality and purity of raw materials, to avoid impurities into the reaction system. At the same time, the ratio of each raw material should be strictly controlled to ensure the smooth progress of the polymerization reaction.
2. Polymerization: Polymerization is a key step in the manufacture of polycarbonate resins. It is necessary to control the reaction temperature, pressure and reaction time to obtain polycarbonate resins with moderate molecular weight and excellent performance.
3. Post-treatment: Pay attention to control the drying temperature and time during the post-treatment process to avoid moisture or deterioration of the product. At the same time, the granulation to ensure uniform particle size, in order to facilitate the subsequent processing.

5. equipment selection and configuration

In the manufacturing process of polycarbonate resin, it is necessary to use the batching tank, polymerization reactor, devolatilization equipment, granulator, dryer and other equipment. When selecting equipment, factors such as production efficiency, product quality, safety and environmental protection should be fully considered, and equipment with stable performance, simple operation and convenient maintenance should be selected. At the same time, the configuration of the equipment should be reasonably arranged according to the production scale and process flow to improve production efficiency and reduce energy consumption.

6. quality control and testing

In order to ensure the product quality of polycarbonate resin, it is necessary to establish a perfect quality control system and testing means. In the production process, the quality of raw materials, reaction conditions, product performance, etc. should be strictly monitored to find and solve problems in time. At the same time, a comprehensive performance test should be carried out on the final product to ensure that the product meets the relevant standards and customer requirements.

7. environmental protection and safety measures

should pay attention to environmental protection and safety measures in the manufacturing process of polycarbonate resin. It is necessary to minimize the discharge of waste water, waste gas, waste residue and other pollutants, and take effective treatment measures to meet environmental protection requirements. At the same time, it is necessary to strengthen the safety management of the production site to prevent the occurrence of safety accidents such as fires and explosions.

8. conclusion

polycarbonate resin as an important raw material for chemical production, its manufacturing method involves many links and key technologies. By mastering the knowledge of manufacturing process, key technology and operation points, equipment selection and configuration, etc., we can better understand and apply the manufacturing technology of polycarbonate resin, improve product quality and production efficiency, and promote the sustainable development of the chemical industry.

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