A device and process for preparing fluorine-containing polymers and fluorine-containing copolymers

Abstract

The invention discloses a device and a preparation technology for preparing fluoropolymers and fluorocopolymers. The device comprises a polymerization pipeline, gas-liquid separating equipment, solid-liquid separating equipment, a water-phase circulating tank, a circulating pump and a thermostat. The inlet of the polymerization pipeline is connected with the outlet of the thermostat, and the outlet of the polymerization pipeline is connected with the gas-liquid separating equipment. The liquid output end of the gas-liquid separating equipment is connected with the solid-liquid separating equipment. The liquid output end of the solid-liquid separating equipment is connected with the water-phase circulating tank. The inlet of the circulating pump is connected with the water-phase circulating tank, and the outlet of the circulating pump is connected with the inlet of the thermostat. The polymerization pipeline is provided with a plurality of feeding pipes along the length direction. Each joint between each of the feeding pipes and the polymerization pipeline is provided with a nozzle. The device and the preparation technology provided by the invention have advantages of high polymerization efficiency, simple and convenient production operation, reaction uniformity, controllable polymerization temperature and no local monomer-accumulation.

Description

technical field [0001] The invention relates to a device for fluorine-containing polymers and fluorine-containing copolymers, and also relates to a manufacturing process for continuously polymerizing or copolymerizing fluorine-containing monomers by using the device. Background technique [0002] Fluoropolymer has a series of excellent functions and characteristics, such as: high temperature resistance, low temperature resistance, corrosion resistance, weather resistance and aging resistance, high insulation, stable dielectric properties, high lubrication, non-toxic and other practical properties, making it It can show its talents in many fields of national economy such as chemical engineering, petrochemical industry, construction engineering, aviation industry, textile industry, automobile, optics, and microelectronics industry. Such as lining and coating on chemical anti-corrosion pipelines and equipment, filter materials for ultra-pure substances, high and low temperature...

AI Technical Summary

Problems solved by technology

[0008] 1. Continuous production cannot be carried out; after each reaction is completed, the reaction kettle needs to be cleaned and the ingredients need to be re-mixed

Therefore, the output of the product is small and cannot be mass-produced

[0009] 2. Due to the difficulty of process control, each kettle has large errors in ingredients, process control, etc., which makes the quality of the product in this kettle and the product in the previous kettle quite different, and the product quality is unstable.

[0010] 3. Materials in the water phase (including several or all of pure water, surfactants, initiators, dispersants, telogens, pH regulators, stabilizers, chain transfer agents, etc.), with the continuous Adding, the content of the components in it has been changing, which means that the monomer polymerization conditions are constantly changing, which leads to differences in the quality of the products in this kettle, which affects the use effect

[0011] 4. Reactors generally use stirring paddles, but due to the structure of the kettle and the structure of the stirring paddles, stirring cannot ensure that the materials in the kettle are uniform, and increasing the stirring intensity not only increases energy consumption, but also has limited effects; Therefore, the polymerization at each point in the tank is not uniform

[0013] 6. Since monomer polymerization is an exothermic reaction, the heat energy generated during polymerization is very large; the heat transfer area of ​​the reactor is small, and the heat transfer effect is not ideal, so the monomer can only enter the reactor in the form of gas, making the polymerization reaction time Long, low output; and if the polymerization temperature is not well controlled, it will also cause an explosion when the temperature is too high

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