A continuous pretreatment device for prepolymerization liquid, its pretreatment method and emergency treatment method

Abstract

The invention discloses a continuous pretreatment device for prepolymerization liquid, its pretreatment method and emergency treatment method, and belongs to the field of prepolymerization liquid pretreatment. The pretreatment device includes: a batching tank, a middle tank, a pre-deoxygenation tank, a deoxygenation packing column, a high-purity nitrogen gas source, an initiator tank, and a reflux oxygenation tank. The treatment method shown is: deoxidize through the pre-deoxygenation tank until the liquid phase oxygen content reaches 0.3-0.5ppm, and then enter the deoxygenation packing column for deep deoxygenation, and finally the minimum oxygen content reaches 2ppb. Continuous deoxygenation is carried out to meet the continuity of photoinitiated polymerization production. The present invention deoxygenates through the combination of the pre-deoxygenation tank and the deoxygenation packing column, which can reduce the liquid phase oxygen content of the pre-polymerization liquid to a minimum of 3 ppb, increase the rate and yield of the polymerization reaction, and improve the performance of the polymer; Moreover, continuous oxygen removal operation can be carried out on the continuously fed materials to meet the continuous production requirements of the device.

Description

technical field [0001] The invention belongs to the field of pretreatment of prepolymerization liquid in polymerization reaction, in particular to a continuous pretreatment device for prepolymerization liquid, its pretreatment method and emergency treatment method. Background technique [0002] At present, most solid-type water-soluble polymers are produced by kettle-type redox-initiated polymerization, which has the disadvantages of high energy consumption, long time, and inconvenient continuous production. Moreover, in the actual production process, due to the differences in some parameters of the raw materials themselves, there will be large differences in the basic parameters of the polymer such as molecular weight, residual monomer content, and conversion rate. [0003] The inventor has found through long-term practice that under the condition of the presence of oxygen, oxygen can capture free radicals in the reaction system, so the reaction often has an induction perio...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the solid-type water-soluble polymers are produced by polymerization initiated by kettle-type redox, which has the disadvantages of high energy consumption, long time, and inconvenient continuous production.

Moreover, in the actual production process, due to the differences in some parameters of the raw materials themselves, there will be large differences in the basic parameters of the polymer such as molecular weight, residual monomer content, conversion rate, etc.

Images