Ion-type macromolecular adsorbent for adsorbing Pd<2+> metal ions and preparation method of ion-type macromolecular adsorbent

A technology of metal ions and polymers, applied in the field of environmental protection and material science, to achieve the effect of simple preparation process, strong adsorption capacity, and high saturated adsorption capacity

Inactive Publication Date: 2016-11-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For existing Pd 2+ Problems existing in the separation and recovery of metal ions, the present invention provides an ionic polym

Method used

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  • Ion-type macromolecular adsorbent for adsorbing Pd&lt;2+&gt; metal ions and preparation method of ion-type macromolecular adsorbent
  • Ion-type macromolecular adsorbent for adsorbing Pd&lt;2+&gt; metal ions and preparation method of ion-type macromolecular adsorbent
  • Ion-type macromolecular adsorbent for adsorbing Pd&lt;2+&gt; metal ions and preparation method of ion-type macromolecular adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A. Mix tetramethylguanidine and 3-bromopropene ethanol solution according to the stoichiometric ratio, stir and react at 80°C for 24h, then remove the solvent under reduced pressure, wash and dry to obtain the guanidine ionic liquid precursor;

[0020] B. the above-mentioned synthesized guanidine ionic liquid precursor and divinylbenzene are added to 100mL ethanol according to the molar ratio of 1:1, then add a certain amount of initiator azobisisobutyronitrile, whose mass fraction is guanidine 1% of the total mass of the ionic liquid precursor and divinylbenzene, stirred at 80°C for 24h, filtered, washed and dried to obtain a bromide ion-type polymer;

[0021] C. Add the above-mentioned synthesized bromide ion-type macromolecule and anion precursor sodium hexafluorophosphate into a certain amount of deionized water according to the stoichiometric ratio, stir at room temperature for 48 hours, filter, wash and dry to obtain hexafluorophosphate ion-type high molecular ads...

Embodiment 2

[0024] The operation method is the same as in Example 1, except that the anion precursor sodium hexafluorophosphate in step C is replaced with sodium tetrafluoroborate to obtain tetrafluoroborate ionic polymer adsorbent.

Embodiment 3

[0026] The operation method is the same as in Example 1, except that the anion precursor sodium hexafluorophosphate in step C is replaced with acetic acid to obtain the acetate ion-type polymer adsorbent.

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Abstract

The invention relates to an ion-type macromolecular adsorbent for adsorbing Pd<2+> metal ions and a preparation method of the ion-type macromolecular adsorbent, belonging to the field of environmental protection and material science. A monomer of the ion-type macromolecular adsorbent consists of divinyl benzene and unsaturated guanidine ion liquid, and anions of the ion liquid are selected from bromide ions, tetrafluoroboric acid ions, hexafluorophosphoric acid ions and acetate ions. The preparation method comprises the following steps: copolymerizing the divinyl benzene and unsaturated guanidine ion liquid monomers by virtue of free radicals, and then preparing the ion-type macromolecular adsorbent by virtue of anion exchange. The adsorbent can be used for rapidly adsorbing and separating Pd<2+> metal ions and has the advantages of high adsorption speed, high saturation adsorption volume, stable adsorption performance, simplicity in separation and the like.

Description

technical field [0001] The present invention relates to a kind of adsorption Pd 2+ The invention relates to an ionic polymer adsorbent for metal ions, which belongs to the fields of environmental protection and material science. Background technique [0002] Palladium (Pd 2+ ) metal ion is an important noble metal catalyst, which has shown excellent catalytic performance in a variety of fine organic synthesis reactions, especially drug synthesis reactions. However, Pd 2+ Catalyzed organic synthesis reactions often lead to homogeneous catalytic systems, Pd 2+ The catalyst is difficult to recover and reuse, and the separation and purification of the product is difficult. Therefore the homogeneous Pd 2 + The separation and recovery of catalysts has aroused widespread concern. At present, the methods for separating metal ions mainly include precipitation, ion exchange and adsorption. The efficiency of the precipitation method is low, and other impurities will be introduc...

Claims

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Application Information

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IPC IPC(8): B01J20/26C02F1/28B01J20/30C08F212/36C08F226/02C02F101/20
CPCB01J20/261C02F1/285C02F2101/20C08F212/36C08F226/02
Inventor 冷炎张晨军蒋平平范为正
Owner JIANGNAN UNIV
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