Reaction device and technology for preparing chlorosulfonated chloroethylene through gas-solid phase method

Abstract

A reaction device and technology for preparing chlorosulfonated chloroethylene through a gas-solid phase method are used for synthesis and production of high-polymer chlorosulfonated polyethylene. Gas-solid phase materials are adopted for performing an incurring and initial reaction in a lifting pipe in the circulating process, a deep reaction is performed in a fluidized bed reactor, the incurring strength and the reaction process are controlled by the fluidized bed reactor and a lifting pipe reactor respectively, the problems that local hot spots, temperature runaway and particle adhesion can be easily caused in the strong heat release process of chlorination and chlorosulfonation are well solved, and meanwhile the method and device have the advantages of being easy to operate, high in raw material utilizing rate and the like.

Description

Technical field [0001] The invention relates to a method and device for preparing chlorosulfonated polyethylene, in particular to a reaction device and process for preparing chlorosulfonated vinyl chloride by a gas-solid phase method. Background technique [0002] Chlorosulfonated polyethylene is made from low-density polyethylene or high-density polyethylene through chlorination and chlorosulfonation. It is a white or yellow elastomer with excellent ozone resistance, atmospheric aging resistance, chemical resistance, etc. , Good physical and mechanical properties, aging resistance, heat and low temperature resistance, oil resistance, flame resistance, abrasion resistance, and electrical insulation resistance. It can be used for wire and cable coating, cable edge layer, hose, tape , Auto parts, building waterproof membranes, tank linings, rubber sheets, anti-corrosion coatings, etc., are very versatile. [0003] The gas-solid phase method is a new chlorosulfonated polyethylene pro...

AI Technical Summary

Problems solved by technology

[0003] The gas-solid phase method is a new production process of chlorosulfonated polyethylene developed in recent years. Compared with the traditional solution method, the gas-solid phase method has the characteristics of short reaction time, low cost, little pollution, and simple process. It is not easy to introduce chlorine and sulfonyl chloride on the surface of PE and CPE powder, and the residual crystallinity affects the quality of CSM. At the same time, the reaction temperature of the system is not easy to control, and the reaction heat in some areas is not easy to remove, resulting in material sticking and coking, resulting in unstable product quality.

[0004] Chinese patent CN101759819 discloses a device for preparing chlorosulfonated polyethylene by a gas-solid phase method. The reaction device includes a fluidized bed, a gas distribution plate, a stirrer, and an ultraviolet light source. For sulfonation reaction, the ultraviolet light source of this device is installed on the top of the reactor, and it is difficult to fully and uniformly irradiate the lower part of the fluidized material, resulting in uneven reaction and affecting the quality of CSM. At the same time, this reaction device cannot completely solve the reaction process. The common problems of the gas-solid phase method are that the temperature is not easy to control, the heat of reaction is not easy to remove, and the gas-solid phase method causes the material to stick and coke.

[0005] Chinese patent CN102698663 discloses a fluidized bed reactor for preparing chlorosulfonated polyethylene by gas-solid phase method. The reaction device includes a fluidized bed reaction body, an ultraviolet lamp glass tube group, a gas premixing chamber, a predistributor, Gas distribution plate, etc., this patent has similarities with the reactor mentioned in Chinese patent CN101759819, all of which are ultraviolet light sources installed in the reactor. The difference is that this patent arranges the ultraviolet light source in the middle of the reactor. It has been improved, but due to the larger volume of the reactor, it will also cause uneven irradiation of materials

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