Polyvinyl chloride paste resin micro-suspension polymerization method

Abstract

The invention provides a polyvinyl chloride paste resin micro-suspension polymerization method. Equipment used in the polymerization process comprises a polymerization kettle, a dispersion tank, a toluene storage tank, an initiator 1 preparation tank, an initiator 1 program tank, an emulsifier program tank, a deionized water storage tank, a monomer storage tank and a post-mixing agent program tank. The input end of the polymerization kettle is communicated with the output end of the dispersion tank, the input end of the dispersion tank is respectively communicated with the initiator 1 program tank, the initiator 2 program tank, the emulsifier program tank, the deionized water storage tank and the monomer storage tank, and the post-mixing agent program tank is communicated with the polymerization kettle; and the initiator 1 program tank is communicated with the initiator 1 configuration tank, and the initiator 1 configuration tank is communicated with the methylbenzene storage tank. According to the invention, the addition of the preparation, the flushing of the polymerization kettle and the recovery of the monomer are all automatically completed, and the whole process is high in automation degree and high in production efficiency, and has great advantages in the aspects of energy consumption, monomer residual quantity, yield and the like.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl chloride production, in particular to a polyvinyl chloride paste resin microsuspension polymerization method. Background technique [0002] PVC paste resin has the advantages of convenient configuration, stable performance, easy control, convenient use, excellent product performance, good chemical stability, etc., so it is widely used in artificial leather, vinyl toys, soft trademarks, wallpaper, paint, hair Production of foam plastics, etc. The production process of domestic polyvinyl chloride paste resin includes micro-suspension method, and its process includes polymerization process, recycling process, drying process and grinding process. In the polymerization process, various preparations need to be prepared, including initiator 1, initiator 2, Emulsifier and post-mixing agent, initiator 1, initiator 2 and emulsifier together with vinyl chloride monomer are added to the dispersion tank to ...

AI Technical Summary

Problems solved by technology

[0003] There are the following problems in the above-mentioned process: 1. Initiator 1, initiator 2, emulsifier and post-mixing agent need to be manually prepared in each kettle, which not only reduces production efficiency, but also easily occurs the problem of large preparation errors, which is not conducive to the quality of polymerization reaction , affecting the yield

2. The toluene in the initiator needs to be manually weighed in each kettle. Human contact and inhalation of toluene will endanger human health and cause pollution to the environment

3. After each polymerization reaction, it is necessary to manually clean the inside of the kettle. The work intensity is high and the cleaning effect is poor. The volatile substances in the polymerization kettle will endanger human health, and the cleaning efficiency is low, and a large amount of sewage will be generated.

4. In the monomer recovery of the polymerization kettle and blowing tank, the recovery time is long, the steam energy consumption is high, and the content of vinyl chloride monomer in the latex entering the drying process is 500-2500ppm, which increases the environmental pollution in the drying process, Risk of health hazards and also excessive consumption of vinyl chloride monomer

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