A kind of iron ion imprinting polymer and its preparation method and application

Abstract

The invention provides a preparation method of an iron ion imprinting polymer. The preparation method comprises the following steps: dissolving an acrylic acid monomer and an inorganic iron salt intoa solvent, performing a polymerization reaction, and removing the inorganic iron salt, so as to obtain the iron ion imprinting polymer. The invention further provides the iron ion imprinting polymer and application thereof. The iron ion imprinting polymer prepared by using the preparation method provided by the invention is internally of a porous structure consisting of small granules, and has a high iron removal rate up to 90% or greater, and the iron removal rate of conventional methods such as extraction and adsorption is only less than 20% under same adsorption conditions; in addition, theiron ion imprinting polymer provided by the invention has a large adsorption capacity, and the adsorption capacity is up to 114.25mg / g at most; the relative selectivity coefficient of the iron ion imprinting polymer is 1-150, and the selectivity is high; and in addition, the iron ion imprinting polymer can be regenerated and repeatedly used, is an adsorbent with excellent properties, and has goodapplication prospects.

Description

technical field [0001] The invention belongs to the field of separation, and relates to an iron ion imprinted polymer, a preparation method and application thereof. Background technique [0002] Iron is one of the most abundant elements in the earth's crust. In addition to iron ore, it also exists in various other ores. For example, iron is one of the main components of copper, chromium, nickel, zinc, lead, aluminum, manganese, titanium and other metal ores. Therefore, the removal of iron impurities is a ubiquitous problem in the industrial production of metals and their compounds. On the other hand, since iron and steel materials are the most common materials used in various production equipment, the loss of equipment during the production process will also introduce iron impurities, and the iron impurities introduced cannot be removed from the source. In industrial production, the presence of iron impurities will affect the reaction process, reduce product purity, and ch...

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Problems solved by technology

At present, the main application fields of iron ion imprinted polymers are analysis and detection and water treatment, and there are few applications in the field of separation and removal of impurities, mainly because the adsorption capacity of the currently prepared iron ion imprinted polymers is generally low and cannot be applied on a large scale. in industrial production

[0005] CN104130440A discloses a method for preparing an iron ion imprinted polymer, which uses acrylamide as a functional monomer and iron methacrylate as an iron source to prepare an iron ion imprinted polymer with a higher adsorption capacity, and applies it to three Selective enrichment and effective detection of valence iron ions, but the nature of iron methacrylate is unstable, not easy to obtain, and there are defects in the process of participating in the reaction, resulting in a decrease in adsorption capacity and selectivity, which greatly limits the efficiency of enriching iron sources. Moreover, its application in the field of separation and removal of impurities is not mentioned, and the functional monomers and iron sources used to prepare iron ion imprinted polymers are also different from those of the present invention.

[0006] CN103214689B discloses a kind of preparation method of ion imprinted polymer film, this method is to prepare the aqueous solution of the monomer of preparing polymer, electrolytic solution, protonic acid, imprinted ion and doping ion solution and mix five kinds of solutions after conducting In situ polymerization on the substrate by unipolar pulse electrodeposition method, one-step synthesis to obtain ferricyanide-doped polymer film that has removed imprinted ions. This method has complicated preparation process and is not used in the field of separation and impurity removal. lower sex

[0007] CN106008843A discloses a surface-modified ion-imprinted polymer microsphere and its preparation method. The hydrophilic monomer, the first initiator, the first chain transfer agent and the ion-imprinted polymer microsphere are mixed under the condition of the first organic solvent Carry out grafting reaction to obtain surface-modified ion-imprinted polymer microspheres. Although the ion-imprinted polymer microspheres prepared by this method are stable, the selectivity is poor, which is not conducive to highly selective impurity removal.

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