Preparation method for Cr (III) ion composite imprinted polymer adsorbent

A technology of imprinting polymers and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve problems such as pollution, environment, harm to humans and animals, waste of resources and environment, etc. The effect of good reproducibility and high adsorption rate

Active Publication Date: 2014-08-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the leather industry, chrome-containing tanning agents account for 70% to 80% of the existing tanning agents. So far, due to the excellent properties of chrome-tanned leather, no tanning agent can completely replace chrome tanning. agent
On the other hand, in the chrome tanning agent used for leather production, about one-third of the chromium remains in the chrome tanning waste liquid, which not only wastes resources but also causes serious pollution to the environment
Due to the toxicity of hexavalent chromium, the use of chromium salts causes great harm to the environment, humans and animals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Dissolve chromium nitrate in dimethyl sulfoxide to make a Cr(III) salt solution with a mass concentration of 28%, then add collagen and α-methacrylic acid, stir at room temperature for 2 hours to make it uniform, and then add N , N-methylenebisacrylamide and azobisisobutyronitrile and nitrogen gas for 30 minutes, sealed, and reacted in a constant temperature water bath at 60°C for 24 hours, then added glutaraldehyde to the obtained reaction system, and sealed the environment and Under the protection of nitrogen, react at 30°C for 3 hours to obtain a reaction liquid; wherein, Cr(III) ions in the added Cr(III) salt solution, amino groups in collagen, α-methacrylic acid, N,N-methylene The molar ratio of dienamide and glutaraldehyde is 1:2:4:20:0.5; the mass of azobisisobutyronitrile added accounts for 1.0% of the total mass of collagen and α-methacrylic acid;

[0024] 2) After the reaction liquid is allowed to stand still, the solid-liquid separation is obtained to obta...

Embodiment 2

[0026] 1) Dissolve chromium nitrate in methanol to make a Cr(III) salt solution with a mass concentration of 28%, then add collagen and α-methacrylic acid, stir at room temperature for 2 hours to make it uniform, and then add N,N-methylene Base bisacrylamide and azobisisobutyronitrile and nitrogen gas for 30min, sealed, and reacted in a constant temperature water bath at 60°C for 24h, then added glutaraldehyde to the obtained reaction system, and reacted at 30°C for 3.5h to obtain a reaction solution Wherein, in the added Cr (III) salt solution, the mol ratio of Cr (III) ion, the amino group in the collagen, α-methacrylic acid, N, N-methylene bis-enamide, glutaraldehyde is 1 :4:8:10:0.8; the quality of the added azobisisobutyronitrile accounts for 3% of the total mass of collagen and α-methacrylic acid;

[0027] 2) After the reaction solution is left to stand, the solid-liquid separation is obtained to obtain the polymer; the polymer is vacuum-dried at 60°C, then ground, sieve...

Embodiment 3

[0029] 1) Dissolve chromium sulfate in dimethyl sulfoxide to make a 30% Cr(III) salt solution, then add collagen and α-methacrylic acid, stir at room temperature for 2 hours to make it uniform, and then add N, N-methylenebisacrylamide and azobisisobutyronitrile were passed through nitrogen for 30 minutes, sealed, and reacted in a constant temperature water bath at 60°C for 24 hours, then added epichlorohydrin to the obtained reaction system, and adjusted The pH value is 10, react at 50°C for 3.5h to obtain a reaction solution; among them, Cr(III) ions in the added Cr(III) salt solution, amino groups in collagen, α-methacrylic acid, N,N - The molar ratio of methylene diene amide and epichlorohydrin is 1:4:10:20:0.8; the quality of the added azobisisobutyronitrile accounts for 2.5% of the total mass of collagen and α-methacrylic acid %;

[0030] 2) After the reaction solution is left to stand, the solid-liquid separation is obtained to obtain the polymer; the polymer is vacuum-...

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PUM

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Abstract

The invention discloses a preparation method for a Cr (III) ion composite imprinted polymer adsorbent. The adsorbent takes Cr (III) ions as template ions, and adopts collagen and acrylic acid as difunctional monomers. In a polar solvent, N, N-methylene bisacrylamide and a micromolecular crosslinking agent undergo crosslinking, azodiisobutyronitrile is used as an initiator to initiate preparation of the Cr (III) ion composite imprinted polymer adsorbent. The adsorbent prepared by the invention has excellent selective absorption on Cr (III) ions, fast adsorption and elution rate, high elution efficiency, and can be recycled.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation method of a Cr(III) ion composite imprinted polymer adsorbent. Background technique [0002] In the leather industry, chrome-containing tanning agents account for 70% to 80% of the existing tanning agents. So far, due to the excellent properties of chrome-tanned leather, no tanning agent can completely replace chrome tanning. agent. On the other hand, in the chrome tanning agent used for tanning, about one-third of the chromium remains in the chrome tanning waste liquor, which not only wastes resources but also causes serious pollution to the environment. Due to the toxicity of hexavalent chromium, the use of chromium salts causes great harm to the environment, humans and animals. With the strengthening of human awareness of environmental protection, it is urgent to solve the pollution problem of leather industry, especially chromiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J3/24C08F220/06C08F220/56C08F222/38C08F2/44B01J20/26B01J20/30C02F1/28C02F1/62C02F101/22
Inventor 王学川张斐斐杨月
Owner SHAANXI UNIV OF SCI & TECH
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