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Palladium loaded chelate resin and preparation method thereof

A chelating resin and palladium-loading technology are applied in the field of preparation of the above-mentioned palladium-loading chelating resin, and can solve problems such as difficulty in synthesizing monomers

Inactive Publication Date: 2010-06-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of monomers by this method is generally difficult

Method used

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  • Palladium loaded chelate resin and preparation method thereof

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preparation example Construction

[0045] During the preparation of the two resins, the filtrate was collected, and the palladium content in the filtrate was measured on ICP-OES. The results show that almost all palladium is loaded on the resin within the experimental concentration range, and the palladium loading rate can reach more than 99.5%. As for the process of preparing resin 2 from resin 1 through potassium borohydride reduction, there was no palladium elution, indicating that the reduction of palladium by potassium borohydride was performed in situ on the resin, and the palladium content in the two resins was equivalent.

[0046] In addition, the loading process of palladium and resin is a chemical bonding process, and palladium is highly dispersed on the resin, and the ratio of palladium to resin is 2.5-15mgPd / g resin under the experimental conditions, palladium can be completely loaded on the resin. Use KBH 4 Reduce resin 1, palladium cannot be eluted. Palladium-polyacrylaldehyde-isonicotinylhydrazone ...

Embodiment 1

[0048] Weigh 4g polyacrylaldehyde isonicotinoyl hydrazone resin, soak it in 0.1mol / L hydrochloric acid for 0.5 hours to swell it, and then add 10mL of 1mg / mL palladium standard solution (palladium loading is 2.5mgPd / g resin), Stir on a magnetic stirrer for about 2 hours. The reacted resin is filtered, collected, and dried naturally to obtain Resin 1. Palladium loading rates are all above 99.5%.

[0049] Take 2g of resin 1, soak it in 0.1mol / L hydrochloric acid for 0.5 hours to swell it, and add 100mL of KBH with a concentration of 0.1mol / L dropwise 4 , The dripping is completed within 1 hour, and then stirred on the electromagnetic stirrer for 2 hours. The reacted resin is filtered and collected to obtain the zero-valent state palladium-carrying resin product of resin 1 (resin 2). During the reduction conversion process, no palladium dissolution was detected in the solution, so the palladium loading rate on the resin was still above 99.5%.

Embodiment 2

[0051] Weigh 2g of polyacrylaldehyde isonicotinic hydrazone resin, soak it in 0.1mol / L hydrochloric acid for 0.5 hours to swell it, then add 30mL of 1mg / mL palladium standard solution (palladium loading is 15mgPd / g resin), Stir on a magnetic stirrer for about 3 hours. The reacted resin is filtered, collected, and dried naturally to obtain Resin 1. Palladium loading rates are all above 99.5%.

[0052] Take 1g of resin 1, soak it in 0.1mol / L hydrochloric acid for 0.5 hours to swell it, and add 100mL of KBH with a concentration of 0.1mol / L dropwise 4 , The dripping is completed within 1 hour, and then stirred on the electromagnetic stirrer for 3 hours. The reacted resin is filtered and collected to obtain the zero-valent state palladium-carrying chelating resin product of resin 1 (resin 2). During the reduction conversion process, no palladium dissolution was detected in the solution, so the palladium loading rate on the resin was still above 99.5%.

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Abstract

The invention relates to palladium loaded chelate resin and preparation method thereof. Polyacrolein-isoniazide acyl hydrazone chelate resin is taken as a high polymer carrier, the palladium selectivity enrichment performance of the active chelate group is utilized to bond ion onto the high polymer carrier, and the prepared palladium loaded chelate resin can be further reduced in situ to obtain zero valence state chelate resin. The invention has the advantages of simple synthesis step, the prepared palladium loaded chelate resin functional material has chemical stabilization, better interface absorption and catalyst degradation efficiency, is applicable to separation and removal of water body hard-degradation organic pollutant, such as dehalogenation degradation of polybrominated diphenyl ethers (PBDEs) like polyhalogenated hydrocarbon and absorption degradation of azo dyes.

Description

Technical field [0001] The invention relates to a palladium-loaded chelating resin. [0002] The invention also relates to a preparation method of the above-mentioned palladium-loaded chelating resin. Background technique [0003] Chelating resin refers to a type of resin compound with various specific functional groups attached to the backbone of the polymer or carrier polymer structure. It is a special effect adsorption and separation material gradually developed on the basis of ion exchange resin in the 1950s and 1960s. Because it combines the two processes of ion exchange and complexation reaction together, compared with ordinary ion exchange resins, chelating resin adsorbents have high bonding strength to metal ions, high selectivity, strong specificity, and large adsorption capacity. , Good stability, and other unique advantages, especially with the development of macroporous polymer resin preparation technology, greatly improving the mechanical and dynamic properties of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 葛小鹏臧利杰侯春凤王东升
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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