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Organic polymeric material, process for producing same and heavy-metal ion remover comprising same

A technology of organic polymers and heavy metal ions, applied in the direction of cation exchange materials, chelate ion exchange, ion exchange, etc., can solve the difficulties of post-processing, recovery and reuse of residues, redissolution of amphoteric substances, secondary pollution, etc. problem, to achieve the effect of excellent removal performance

Inactive Publication Date: 2002-11-27
EBARA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most widely used at present is the method that makes heavy metal ion become precipitation such as hydroxide among above-mentioned (1), but, the problem that this method exists is: the post-processing, reclaiming and reuse of generation residue are difficult; When the pH is excessively increased, it will cause the redissolution of the amphoteric substance; it is difficult to remove the formed complex salt, etc.
In addition, even when there is no radioactive waste, if the used resin is not disposed of properly, there is a risk of diffusion of the adsorbed heavy metal ions (such as mercury, cadmium) and serious secondary pollution.

Method used

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  • Organic polymeric material, process for producing same and heavy-metal ion remover comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] As an organic polymer base material, a surface density of 50g / m made of polyethylene fibers with a fiber diameter of 10-16μm is used 2 of non-woven fabrics. Under dry ice cooling, 40 g of this nonwoven fabric substrate was irradiated with 160 kGy of γ-rays. The irradiated substrate was impregnated with chloromethylstyrene (50% meta-position, 50% para-position, manufactured by Seimi Chemical Co., Ltd., trade name: CMS-AM) from which the polymerization inhibitor had been removed in advance, and reacted at 50° C. for 5 hours, 86 g of chloromethylstyrene grafted non-woven fabrics with a graft rate of 115% were obtained.

[0030] 19.6 g of this grafted nonwoven fabric was immersed in an isopropanol solution (450 ml) of 52.5 g of diethanolamine, and reacted at 70° C. for 48 hours. After the reacted non-woven fabric substrate was washed successively with pure water, 0.1N aqueous sodium hydroxide solution and methanol, the solvent was removed, and dried under reduced pressure...

Embodiment 2

[0032] 20.7 g of chloromethylstyrene grafted nonwoven fabrics obtained in the same manner as in Example 1 were immersed in acetone solution (400 ml) of 36 g of sodium iodide, and reacted at 50° C. for 48 hours. After the reacted nonwoven fabric substrate was washed with pure water and acetone in this order, the solvent was removed. Subsequently, this nonwoven fabric was immersed in a dimethylformamide solution (360 ml) of 77.8 g of diethyl iminodiacetate, and heated at 80° C. for 48 hours to make it react. The reacted nonwoven fabric was washed with methanol. Furthermore, the non-woven fabric was immersed in a 1N sodium hydroxide-ethanol mixed solution (200ml+200ml), reacted at 80°C for 48 hours, and the non-woven fabric after the reaction was repeatedly washed with pure water, and the water was removed. , dried under reduced pressure at 50° C. to obtain 28.5 g of the organic polymer material of the present invention, which is called heavy metal ion removing agent 2. Compara...

Embodiment 3

[0035] Copper sulfate was dissolved in pure water to prepare a 100 ppm copper ion aqueous solution (pH=5.15). In an Erlenmeyer flask with a sealing plug, the 9 cm 2 The sample was dipped in 100 ml of this aqueous solution, and stirred well at 25°C. The concentration of copper ions in the aqueous solution after 5 minutes, 15 minutes, 30 minutes, 60 minutes, and 120 minutes after immersion in the removing agent was measured. The results are shown in Table 1.

[0036] Remover 2

[0037] As can be seen from Table 1, the heavy metal ion remover made of the organic polymer material of the present invention has a significantly better removal performance of copper ions than the remover obtained by grafting glycidyl methacrylate in the past. Embodiment 4: the copper ion removal performance evaluation test (batch type) of heavy metal ion removal agent in organic medium

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Abstract

An object of the present invention is to provide a heavy metal ion removing agent which has excellent removal performance compared with conventional substances. The organic polymer material of the present invention is characterized in that, on the main chain of the organic polymer substrate, there are polymer side chains derived from halogenated alkyl-substituted styrene, and on the polymer side chains are introduced Compound functional groups. Since the organic polymer material of the present invention has excellent performance in removing heavy metal ions, it is suitable for use as a heavy metal ion removing agent.

Description

technical field [0001] The present invention relates to an organic polymer material, which can be used as a remover to remove cobalt, nickel, copper, mercury, Cadmium, lead, iron, zinc and other heavy metal ions. Background technique [0002] In the past water treatment technology, as a method for removing heavy metal ions contained in water or waste water, it includes (1) making the target heavy metal ions into insoluble metal salts and hydroxide precipitates; (2) removing heavy metal ions A method for evaporating and concentrating; (3) a method for removing heavy metal ions by adsorption using an adsorbent; (4) a method for separating and removing heavy metal ions by using membrane separation; (5) a method for extracting and removing heavy metal ions by solvent extraction; (6) Electrochemical methods such as precipitation of heavy metal ions on electrodes. [0003] The most widely used at present is the method that makes heavy metal ion become p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/26B01J20/30B01J39/18B01J39/20B01J45/00C02F1/42C08F8/44C08F291/18C09K3/00
CPCB01J20/26B01J20/261B01J39/18B01J39/20B01J45/00C08F8/44C08F255/02C08F2/46C08F212/16
Inventor 小松诚武田收功藤原邦夫高井雄
Owner EBARA CORP
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