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Preparation method for chelating ion exchange resin using inorganic substance as matrix

An ion exchange resin and chelating type technology, applied in the field of preparation of chelating ion exchange resin, can solve the problems of long adsorption time, high cost, low mechanical properties, etc. Effect

Active Publication Date: 2013-06-26
GANZHOU RARE EARTH MINERAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently used chelating resins are prepared with synthetic polymers as carriers. Due to their disadvantages such as low mechanical properties, poor thermal stability, weak chemical bonding with metals, long adsorption time, and high cost, scientists We are still searching for better adsorbents

Method used

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  • Preparation method for chelating ion exchange resin using inorganic substance as matrix
  • Preparation method for chelating ion exchange resin using inorganic substance as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 5kg of silica gel into a corrosion-resistant reaction kettle equipped with stirring, then add 30L and 1M HCl, and after vacuuming for 15 minutes, the vacuum degree is 40mm Hg. Start heating and boiling. The stirring speed should not be too fast, and should be controlled below 70 rpm to avoid damage the silicone. Stir and pickle at a bubble point temperature of 80°C for 12 hours, then pass cooling water to cool down, and release silica gel when the temperature of the material drops to room temperature. The released silica gel was filtered to remove the filtrate, and then washed twice with deionized water and methanol successively, and the washing was stopped when the washing water showed neutrality, and the silica gel and water were separated, and then the silica gel was dried to constant weight to obtain the Silica gel (pretreated substrate) washed and dried to constant weight. Put the silica gel that has been pickled and dried to constant weight on the sand funnel...

Embodiment 2

[0038] Add 5 kg of silica gel into a corrosion-resistant reaction kettle equipped with stirring, and then add 30L, 1M HNO 3 , after evacuating for 15 minutes, the vacuum degree is 30mm Hg, start heating to 100°C and boil, the stirring speed should not be too fast, keep it below 70 rpm, so as not to damage the silica gel. Stir and pickle at a bubble point temperature of 80°C for 12 hours, then pass cooling water to cool down, and release silica gel when the temperature of the material drops to room temperature. The released silica gel was filtered to remove the filtrate, and then washed twice with deionized water and methanol in turn, and the washing was stopped when the washing water showed neutrality, and the silica gel and water were separated, and then the silica gel was dried to constant weight. Put the silica gel that has been pickled and dried to constant weight on the sand funnel, let the humid air of potassium bromide saturated solution enter the sand funnel through th...

Embodiment 3

[0043] Except that the molecular weight of polyallylamine is 50,000 instead of polyallylamine, other conditions are the same as in Example 1.

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Abstract

The invention belongs to the technical field of macromolecular ion exchange resin, and relates to a preparation method for chelating ion exchange resin. The preparation method comprises the following steps of: acidizing a matrix by using acid under the heating condition; washing the matrix by using deionized water until the matrix is neutral; allowing damp air in a sodium bromide or potassium bromide saturated solution reaction kettle to enter the matrix which is treated in the previous steps, so that a water molecule single layer is generated on the surface of the matrix; performing silanization reaction on the hydrated matrix, alkane and a silane coupling agent to obtain a silanized matrix; performing grafting reaction on the silanized matrix and multi-amino polymer to obtain a functional resin material; and performing Mannick reaction on the functional resin material, formaldehyde and phosphorous acid so as to obtain the final chelating ion exchange resin using an inorganic substance as the matrix. The method has the advantages that the operation process is short and the method is convenient to operate. A reagent is not required to be added into an ion exchange column when noble metal ions are adsorbed, so pollution and wastes are avoided.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange resins, and relates to a preparation method of chelating ion exchange resins. Background technique [0002] As a functional polymer material, polymer chelating resin has the advantages of simple synthesis, large adsorption capacity, easy elution, no secondary pollution and good stability. It is used in the fields of organic chemical wastewater and wastewater containing heavy metal ions. received widespread attention. Compared with ion exchange resins, chelating resins have stronger binding ability to metal ions and higher selectivity, and are widely used in enrichment, separation, analysis, and recovery of metal ions. It has been a research hotspot in recent years to develop new polymer chelating resins and use them in metal recycling and environmental protection. [0003] The chelating performance of chelating resins to noble metal ions is mainly related to the type of coordination...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F26/02C08F8/42C08F8/40C08G73/04B01J45/00
Inventor 马睿陈涛暴峰严春杰高洁殷静王国珍周森仇秀梅
Owner GANZHOU RARE EARTH MINERAL IND
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