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Method of preparing three-dimensionally ordered macroporous chelate resin with hydrophilic-structure framework

A three-dimensional ordered, chelating resin technology, used in chemical instruments and methods, other chemical processes, etc., can solve the problems of instability, easy loss, soft quality, etc., and achieve stable performance, low diffusion resistance, and large adsorption capacity. Effect

Inactive Publication Date: 2010-04-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Zhang Zhenqian, Lu Jianmei, Wang Lihua, et al. Synthesis and performance research of cross-linked polyvinylamine. Petrochemical Industry, 2002, 31(4) 254-258.) Polyvinylamines, the amine groups contained in the molecule are effective for heavy metals Ions have a strong chelating ability, but polyvinylamines have disadvantages such as softness, instability and easy loss.

Method used

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  • Method of preparing three-dimensionally ordered macroporous chelate resin with hydrophilic-structure framework
  • Method of preparing three-dimensionally ordered macroporous chelate resin with hydrophilic-structure framework
  • Method of preparing three-dimensionally ordered macroporous chelate resin with hydrophilic-structure framework

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of Three-Dimensional Ordered Macroporous Polyethyleneamine Chelating Resin with Average Pore Diameter of 200nm

[0031] (1) Preparation of silica template

[0032] At room temperature, add 12.5g of absolute ethanol, 6.2g of 25% ammonia water, and 15.0g of distilled water in sequence in a three-necked flask equipped with electric stirring. After stirring evenly, quickly add 14.5g of ethyl orthosilicate, and stir. When the solution becomes turbid and no longer changes, that is, the hydrolysis reaction of tetraethyl orthosilicate is completed, then pour the obtained suspension into a 500mL beaker, and the solvent will evaporate naturally at room temperature, and then sinter the template at 200°C in a horse-boiling furnace After 2 hours, it was slowly lowered to room temperature to obtain a silica colloidal crystal template with an average particle size of 200 nm.

[0033] (2) Preparation of three-dimensional ordered macroporous poly N-vinyl formamide macroporous...

Embodiment 2

[0042] Preparation of Three-Dimensional Ordered Macroporous Polyethyleneamine Chelating Resin with Average Pore Diameter of 350nm

[0043] (1) The preparation method of silica colloidal crystal template is the same as that of Example 1 step (1), changing the quality of ammonia water, dehydrated alcohol, distilled water, and tetraethyl orthosilicate to 7.5g, 13.8g, 13.5g, 12.8g respectively , to obtain a silica colloidal crystal template with a template particle size of 350 nm.

[0044] (2) Add 0.1g blocky average grain through the colloidal crystal template that the silica microspheres in the range of 350nm adhere to each other in the two-necked bottle, inject 8.30g N-vinylacetamide monomer, 1.66g N, N sub- A mixture of methacrylamide and 0.01g of potassium persulfate is immersed in the colloidal crystal template, soaked for half an hour, heated up to 60°C, and reacted at this temperature for 12h to obtain silica / crosslinked polyethylene N-ethylene Based on the complex of ace...

Embodiment 3

[0049] Preparation of Three-Dimensional Ordered Macroporous Polyethyleneamine Hydrophilic Chelating Resin with Average Pore Diameter of 500nm

[0050] (1) The preparation method of the silica colloidal crystal template is the same as that of Example 1 step (a), except that the quality of ammonia water, absolute ethanol, distilled water, and tetraethyl orthosilicate is changed to 7.5g, 13.8g, 12.5g, and 13.8g respectively. g, to obtain a silica colloidal crystal template with a template particle size of 500 nm.

[0051] (2) Add 0.1g block-like colloidal crystal templates with silica microspheres in the range of 500nm to each other in the two-necked bottle, inject 5.90g N-vinyl formamide monomer, 1.50g diethylene triethylene The mixed solution of amine and 0.0092g ammonium persulfate is immersed in the colloidal crystal template, soaked for half an hour, heated up to 60°C, and reacted at this temperature for 12h to obtain a composite of silica / cross-linked poly N-vinyl formamide...

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Abstract

The invention relates to a method of preparing three-dimensionally ordered macroporous chelate resin which has a hydrophilic-structure framework and can absorb precious metal irons in aqueous solution, belonging to the field of the chelate resin. The method of preparing the three-dimensionally ordered macroporous chelate resin comprises the following steps: (1) preparing 80-1000nm silica colloidal crystal template; (2) preparing three-dimensionally ordered Poly(N-vinylformamide) or poly(n-vinylacetamide) macroporous material; and (3) preparing hydrophilic three-dimensionally ordered macroporous chelate resin. Compared with the traditional macroporous or gel-type polyvinylamine resin, the novel three-dimensionally ordered macroporous chelate resin prepared with the method has the advantages that the regularly-arranged porous channel system has small diffusion resistance, which is good for the metal irons enter the absorption center from all directions. In addition, the novel three-dimensionally ordered macroporous chelate resin is easy to synthesize, has stable performance, good hydrophilic performance and high selectivity, contains many functional groups, can absorb a large number of metal irons and has better development and utilization values in the aspect of avoiding heavy metal pollution and protecting the environmental water.

Description

technical field [0001] The technical solution of the present invention relates to the field of chelating resins, in particular to a method for preparing a three-dimensional ordered macroporous chelating resin whose skeleton is a hydrophilic structure for absorbing precious metal ions in an aqueous solution. Background technique [0002] Three-dimensional ordered macroporous (3DOM) material, also known as inverse opals, has a pore size greater than 50nm. Compared with other porous materials, its unique and orderly macroporous structure facilitates the transfer of substances from various Direction into the pores can reduce the diffusion resistance of substances, especially suitable for the transmission of biomacromolecules such as proteins, and can be used to immobilize biomacromolecules with high catalytic activity such as enzymes. At present, three-dimensional ordered macroporous materials are generally prepared by colloidal crystal template method. It mainly includes the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08F126/02C08F2/44B01J20/26
Inventor 张旭原丽霞王小梅刘宾元刘盘阁
Owner HEBEI UNIV OF TECH
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