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Production method of polyacrylonitrile chelating resin metal adsorbent

A chelating resin, polyacrylonitrile technology, used in chemical instruments and methods, other chemical processes, etc., can solve the problems of polluted environment, low elution rate, etc., and achieve large adsorption capacity, good thermal stability, and high mechanical strength. Effect

Inactive Publication Date: 2013-01-09
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Polystyrene-based chelating resins are widely used in the selective separation and recovery of heavy metal ions, but there are disadvantages such as environmental pollution and low elution rate during the synthesis process.

Method used

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  • Production method of polyacrylonitrile chelating resin metal adsorbent
  • Production method of polyacrylonitrile chelating resin metal adsorbent
  • Production method of polyacrylonitrile chelating resin metal adsorbent

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Embodiment 1

[0047] The production method of embodiment 1, polyacrylonitrile chelating resin metal adsorbent comprises the following steps:

[0048] 1. Using polyacrylonitrile microspheres (D-160 macroporous adsorption resin) as the matrix and 2-aminobenzothiazole (ABT) as the ligand, the polyacrylonitrile microspheres are chemically grafted, and the following steps are carried out in sequence:

[0049] ① Weigh 500 mg of polyacrylonitrile microspheres, transfer them into a 500 mL three-necked bottle, add 300 mL of reaction solvent --- ethylene glycol (ED), soak overnight (that is, soak for 24 hours, so that polyacrylonitrile The microspheres are fully swollen);

[0050] ②. Add 3.57g of ligand --- 2-aminobenzothiazole (ABT) and a little catalyst --- - Sodium metal (1240 mg), heated and stirred (250r / min) at 140°C under nitrogen protection for 12 hours; after the reaction, filtered to obtain the modified polyacrylonitrile chelating resin;

[0051] ③. Soak the modified polyacrylonitrile che...

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Abstract

The invention discloses a production method of a polyacrylonitrile chelating resin metal adsorbent. The method comprises the following steps of: (1) adding polyacrylonitrile microspheres to a reaction solvent for soaking; (2) adding 2-aminobenzothiazole as a ligand and metal sodium as a catalyst to a substance obtained in the step (1), stirring and reacting under the protection of nitrogen for 11-13h at the revolving speed of 200-300r / min and at 130-150 DEG C; and (3) soaking and washing the obtained modified polyacrylonitrile chelating resin with the reaction solvent until the washing liquid is colorless, then sequentially washing with de-ionized water, ethanol and ether for several times, washing with distilled water, then sequentially performing alkali washing, water washing, acid washing and water washing, and drying to constant weight at 40-60 DEG C so as to obtain the polyacrylonitrile chelating resin metal adsorbent.

Description

technical field [0001] The invention relates to a production method of a novel polyacrylonitrile chelating resin metal adsorbent, in particular to a modified chelating resin material capable of selectively adsorbing heavy metal ions in food, having good adsorption performance and being reusable, and its production method. Background technique [0002] Life has an unbearable "heaviness". With the development of industrialization of various industries in China, the pollution of heavy metals has become a major problem of food safety. However, due to the variety of heavy metals, low concentration, high complexity of samples, and serious matrix interference, although many instruments with high sensitivity and selectivity have appeared in recent years, the cost is high, which is not conducive to the majority of Chinese middle schools. Small food production and operation enterprises, so the relatively economical spectrophotometer has become the main instrument for the determinati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 熊春华贾倩刘欢姚彩萍
Owner ZHEJIANG GONGSHANG UNIVERSITY
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