Copolymerization high-molecular chelating flocculating agent and preparation method thereof

Abstract

The invention relates to a copolymerization high-molecular chelating flocculating agent and a preparation method thereof. According to the invention, polyethylene polyamine and piperazine are taken asraw materials, under mild condition, polyethylene polyamine containing an active amino group and piperazine ring having a rigid structure are introduced into a high-molecular chain through chloropropylene oxide, and then the material is reacted with carbon disulfide and sodium hydroxide for inoculating a strong chelation group disulfo formyl group in the molecular chain. The rigid piperazine ringis introduced into the high-molecular chain, the molecular chain structure and the spatial distribution of the chelation group can be effectively changed, the introduction of the rigid piperazine ring in the high-molecular chain is in favor of coordination of the chelation group and heavy metal ions, and in favor of floc formation and growth, the generated floc is compact and large, the chelatingflocculation capability on the heavy metal and floc separating performance are increased. The method has the advantages of simple process flow, mild technology control condition, and easy control andrealization, and the whole process is environmentally friendly, and has good popularization application value.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a copolymerized polymer chelating flocculant and a preparation method thereof. Background technique [0002] Heavy metal pollution is currently the most serious pollution and one of the most difficult to deal with. Due to the rapid development of industry, the number of industries and fields involving heavy metals is increasing day by day, and the amount of heavy metal waste discharged is increasing day by day, which makes the ecological environment and human beings more and more exposed to the threat of heavy metals. Especially with the improvement of people's quality of life and level, the quality requirements for products continue to increase. Therefore, the types and quantities of additives added in the manufacturing and processing of these products continue to increase, making the composition of the discharged heavy metal wastewater more complicated. Treatment...

AI Technical Summary

Problems solved by technology

Currently existing chelating agents, some of which form chelates are easily soluble in water, such as ammonia carboxyl complexing agents, typically such as EDTA; some form small flocs, such as small molecule chelating agents such as copper reagents; some chelating agents The complexing ability is relatively weak, such as citric acid, thiourea, etc.; some formed floc structure is loose, and the sedimentation is relatively slow, such as some chelating agents with multifunctional groups, such as polyethylene polyaminodithioformate

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