A kind of chlorination treatment device and chlorination process for polyimide production

Abstract

The invention provides a chlorination treatment device and a chlorination process for polyimide production, and relates to the technical field of polyimide production and treatment equipment. The main shaft is mechanically connected to the end, and several layers of reaction tanks are arranged at intervals from top to bottom in the reactor body. The bottom of the bottom reaction tank is provided with a pickling tank. Feed in the topmost reaction tank, use the heating part to control the temperature in the upper reaction tank, the feed is heated and stirred in the upper reaction tank, and carry out a layer-by-layer chlorination reaction, until the liquid leaks to the reactor that is not connected to the heating part. In the reaction tank, it is cooled rapidly, and at the same time, the acid liquid is fed through the lower feed port, and the acidification reaction is carried out layer by layer through the liquid leakage step by step, until it leaks into the acid washing tank at the bottom, and the bottom end of the main shaft drives the tank to stir. The parts are rotated and stirred synchronously, and the material is discharged through the liquid outlet at the bottom of the pickling tank.

Description

technical field [0001] The invention relates to the technical field of polyimide production and treatment equipment, in particular to a chlorination treatment device for polyimide production and a chlorination process. Background technique [0002] Polyimide is one of the organic polymer materials with the best comprehensive properties. It has the advantages of high temperature resistance above 400°C, extremely low temperature resistance, and insoluble in organic solvents. It is ultimately used in films, coatings, and advanced composite materials. etc., its application fields include aviation, aerospace, microelectronics, nanometers, liquid crystals, separation membranes, lasers, etc., and belong to polymer materials. [0003] In the polyimide production process, it is generally prepared through a series of chlorination, acid washing, and polycondensation reactions. However, in the prior art, there are few special reaction devices specially designed for polyimide production....

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Problems solved by technology

[0003] In the polyimide production process, it is generally prepared through a series of chlorination, pickling, and polycondensation reactions. However, there are few special reaction devices specifically for polyimide production in the prior art. In the prior art, for example Patent Nos. CN201621302106.8 and CN201910446904.X disclose treatment devices for continuous chlorination of organic compounds, but most of them require multiple reactors or reactors to be connected in series to match the different reaction conditions of each step. There are many redundant connections and transmissions between devices, and the degree of integration is not high, which also affects the efficiency of reaction processing. Therefore, it is not enough to meet higher practical requirements

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