In-situ polymerization method modified anion exchange resin as well as preparation method and application thereof

A technology of exchange resin and in-situ polymerization, which is applied in the fields of chemistry and environment, can solve the problems of great influence of other ions and limited adsorption capacity, etc., and achieve the effect of improving adsorption capacity, increasing positive charge, and improving adsorption treatment effect
CN110339868AInactive Publication Date: 2019-10-18SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2019-10-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an in-situ polymerization method modified anion exchange resin as well as a preparation method and application thereof. The modified anion exchange resin is prepared by usingan anion exchange resin with a tertiary amine group [-N(CH3)2] as an organic framework, epoxy chloropropane and dimethylamine as a modifier and ethylenediamine as a cross-linking agent through modification. According to the modified anion exchange resin provided by the invention, the content of amino is increased, weak alkali groups are also increased, the Zeta potential of the modified anion exchange resin is also remarkably increased, and in addition, the isoelectric point of the modified anion exchange resin is 6.62 which is far greater than that of an unmodified resin material, so that theadsorption treatment function on Cr(VI) is greatly improved, and the modified anion exchange resin has the advantages of being stable in quality, excellent in adsorption property, low in cost, simplein solid-liquid separation, large in mechanical strength, high in adsorption capacity, good in regeneration effect, free of secondary pollution, and the like.
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Description

technical field

[0001] The invention relates to an in-situ polymerization modified anion exchange resin and its preparation method and application, which belong to the technical fields of chemistry and environment. Background technique

[0002] Chromium is considered to be one of the most toxic metals, and it mainly comes from wastewater produced by industries such as mining, metallurgy, electroplating industry, metal deep processing, steel manufacturing, tanning, dyestuff, textile industry, and chromate preparation. Chromium is a variable-valence element, and it mainly exists in two relatively stable valence states in natural water: Cr(III) and Cr(VI). Cr(VI) is soluble, usually in water as CrO 4 2- 、Cr 2 o 7 2- 、HCrO 4 - Anions with high mobility exist in the form of anions, which have strong oxidation and migration capabilities, and Cr(VI) can diffuse into cells through the cell membrane and oxidized biomolecules, which is more dangerous than Cr(III). The ecologic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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