Solid phase imprinted double-position extraction agent for copper (II) and preparation method of extraction agent

Abstract

The invention discloses a solid phase imprinted double-position extraction agent for copper (II). The solid phase imprinted double-position extraction agent comprises a salicylaldoxime ligand, which can enrich copper (II) ions from various water systems with high selectivity, and further comprises a quaternary ammonium structure unit, which is strong in hydrophilia, capable of remarkably improving the water wettability and the electric charge density of the surface of the solid phase imprinted double-position extraction agent, and favorable to quick diffusion of the copper (II) ions in the water systems on the surface of the solid phase imprinted double-position extraction agent, so as to quickly reach adsorption equilibrium, and overcomes the defects that the existing ion chelate polymer is strong in hole inside hydrophobicity, and long in adsorption equilibrium time; furthermore, the solid phase imprinted double-position extraction agent comprises an amino with an anion exchange function; after elution and recovery of copper (II), the amino in an alkaline solution is easily transformed into a zwitterionic polymer, so that the solid phase imprinted double-position extraction agent can not only chelate and adsorb the copper (II) ions, but also adsorb and contend against anions, and keep material balance of zwitterions during the solid phase extraction process.

Description

technical field [0001] The present invention relates to a kind of chelating polymer, particularly relate to the chelating polymer of macromolecule chain side linking amine group, quaternary ammonium cation and salicylaldoxime, as copper (II) solid-phase imprinted dual-position extractant, used in various water systems The enrichment and separation of copper (II) ions has the function and characteristics of simultaneously extracting counter anions, and belongs to the field of functional polymer materials. technical background [0002] Nowadays, the popular liquid-liquid extractant in the copper hydrometallurgy industry is 5-alkyl salicylaldoxime and its compound, its copper-iron separation coefficient is as high as 450-550, the extraction capacity is large, and the extraction performance is good. The high selectivity of 5-alkyl salicyl aldoxime to copper ion is due to the coordination atoms of 5-alkyl salicyl aldoxime being N and O. When two 5-alkyl salicyl aldoximes form a c...

AI Technical Summary

Problems solved by technology

But the weak point of 5-alkyl salicylaldoxime is that when 5-alkyl salicylaldoxime copper (II) chelate concentration is higher, precipitation occurs easily; The problem of a small amount of emulsions and the long separation time of oil-water two-phase chromatography lead to complex and changeable hydrometallurgy process control, harsh production environment, and serious waste pollution.

However, the synthesis technique of the described diposition ligand as copper (II) ion extractant is complex, the raw material price is high, and the performance needs to be improved.

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