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Preparation method of ion imprinted hydroxamic acid chelate resin

A chelating resin and ion imprinting technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as uneven distribution, limited resin adsorption performance, and low content of resin functional groups

Active Publication Date: 2013-04-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dynamic analysis of research at home and abroad shows that most of the hydroxamic acid resins are currently synthesized by hydroxamic modification of polymers such as polystyrene, polyacrylate, polyacrylamide, polyacrylonitrile, and starch. Influenced by the reaction efficiency of polymers, the functional group content of the prepared resin is low and the distribution is uneven, which limits the adsorption performance of the resin

Method used

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  • Preparation method of ion imprinted hydroxamic acid chelate resin
  • Preparation method of ion imprinted hydroxamic acid chelate resin
  • Preparation method of ion imprinted hydroxamic acid chelate resin

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 Synthesis and adsorption performance of copper ion imprinted hydroxamic acid resin

[0029] Dissolve 0.12 mol of hydroxylamine hydrochloride and 0.20 mol of sodium hydroxide in 100 ml of a solution with a volume ratio of methanol to water of 1:1, then slowly add 0.1 mol of methyl acrylate into the solution, and control the reaction temperature at 60°C for 5 hours to obtain propylene hydroxamic acid solution. Use sulfuric acid to adjust the pH value of the solution to about 4, add 100ml of 0.20mol / L copper sulfate solution with a pH value of 4, and react at 30°C for 2h. Add 0.5 g of polyvinyl alcohol, 0.5 g of divinylbenzene and 0.5 g of benzoyl peroxide into the solution, and react at 60° C. for 3 h to obtain resin 1 . After filtering and washing with water, put the resin into a stoppered Erlenmeyer flask, add 50mL of 1mol / L sulfuric acid, shake at 40°C for 4h, filter, and dry at 60°C for 1h to obtain the copper ion imprinted hydroxamic acid resin (resin 2 )...

Embodiment 2

[0032] Example 2 Synthesis and adsorption performance of rare earth metal ion imprinted hydroxamic acid resin

[0033] The synthetic method of propenylhydroxamic acid is identical with embodiment 1. Use nitric acid to adjust the pH value of the solution to about 5, add 100ml of 0.20mol / L lanthanum nitrate, cerium nitrate or yttrium nitrate solution with a pH value of 5, and react at 30°C for 1h. Add 0.5g of polyvinyl alcohol, 0.01g of sodium dodecylbenzenesulfonate, 0.5g of divinylbenzene, 0.5g of styrene and 0.5g of benzoyl peroxide into the solution, and react at 60°C for 3 hours to obtain a resin . After filtering and washing with water, put the resin into a stoppered Erlenmeyer flask, then add 50mL of 1mol / L sulfuric acid, and shake at 40°C for 4h to obtain a rare earth metal ion imprinted hydroxamic acid chelating resin. Resins prepared with lanthanum, cerium, and yttrium as imprinted ions are designated as resin 4, resin 5, and resin 6, respectively.

[0034] Take 0.2...

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Abstract

The invention discloses a preparation method of ion imprinted hydroxamic acid chelate resin. According to the invention, propenyl hydroxamic acid is subjected to coordination with imprinting metal ions such as manganese, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium, and the like; under the effects of a crosslinking agent and an initiating agent, a propenyl hydroxamic acid-metal ion chelate is polymerized; and the imprinting metal ion is eluted, such that the ion imprinted hydroxamic acid chelate resin is obtained. The method provided by the invention has the advantages of mild reaction condition and high reaction efficiency. The prepared resin has the advantages such as high absorption capacity, high absorption selectivity, and the like.

Description

technical field [0001] The technical field to which the invention belongs is the preparation of chelating resins, and mainly relates to a method for preparing an ion-imprinted hydroxamic acid chelating resin. Background technique [0002] Hydroxamic acid compounds are a typical class of metal chelating agents, which exist in two tautomers, ketone and alcohol, and the ketone isomer is also called hydroxamic acid or hydroxamic acid. Hydroxamic acid compounds are widely used in the fields of flotation, solvent extraction, chemical analysis and medicine of rare earth, titanium, iron and other metal oxide ores because of their unique ligand structure and excellent coordination performance. Hydroxamic acid Chelating resins are also used in the separation and enrichment of iron, copper, rare earth and other metal ions. [0003] Agrawal and others used polystyrene and acetyl chloride as raw materials to synthesize polychloroformylstyrene through acetylation, carboxylation and chlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/04C08F8/00C08J9/28B01J20/26B01J20/30
Inventor 王帅钟宏刘广义曹占芳夏柳荫
Owner CENT SOUTH UNIV
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