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Preparation method for three-dimensional ordered macroporous chelating resin

A three-dimensional ordered, chelating resin technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of difficult post-functionalization and cumbersome preparation methods, and achieve small diffusion resistance, good hydrophilicity, and selectivity Good results

Inactive Publication Date: 2010-03-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: in view of the cumbersome preparation methods of the current three-dimensional ordered macroporous inorganic and metal materials, which are not easy to perform post-functionalization, a kind of pore A method for introducing a hydrophilic cantilever with a chelating group into the wall is used to prepare a new three-dimensional ordered macroporous chelating resin capable of adsorbing precious metal ions in aqueous solution

Method used

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  • Preparation method for three-dimensional ordered macroporous chelating resin
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  • Preparation method for three-dimensional ordered macroporous chelating resin

Examples

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Embodiment 1

[0044] Preparation of Novel Three-Dimensional Ordered Macroporous Chelating Resin Containing 2-Mercaptobenzothiazole with Average Pore Size of 180nm

[0045] (a) Preparation of silica template

[0046] At room temperature, add 12.0g of absolute ethanol, 6.2g of 25% ammonia water and 10.0g of distilled water in sequence in a three-neck flask equipped with electric stirring. After stirring evenly, quickly add 14.2g of ethyl orthosilicate, and react 8 After one hour, pour the obtained suspension into a 500mL beaker, and the solvent evaporates naturally at room temperature, and then sinters the template in a muffle furnace at 200°C for 2 hours, and slowly lowers to room temperature to obtain carbon dioxide with an average particle size of 180nm. Silica colloidal crystal template.

[0047] (b) Preparation of three-dimensional ordered macroporous materials:

[0048] Add 0.5g block-shaped colloidal crystal template with the average particle size of 200nm silica microspheres adhered...

Embodiment 2

[0061] Preparation of a new three-dimensional ordered macroporous chelating resin containing 4-aminopyridine with an average pore size of 340nm.

[0062] (a) The preparation steps of the silica template refer to step (a) of Example 1, and only adjust the amount of reagents added: 13.8 g of absolute ethanol, 7.5 g of ammonia water with a percentage concentration of 25%, 13.5 g of distilled water, and ethyl orthosilicate 12.8g to obtain a silica template with an average particle size of 400nm.

[0063] (b) The preparation method of the three-dimensional ordered macroporous cross-linked polystyrene material is the same as the step (b) of Example 1, changing the initiator to 0.0055g dibenzoyl peroxide, prepolymerizing at 55°C for 2 hours, 80°C After reacting for 12 hours, a three-dimensional ordered macroporous cross-linked polystyrene with a pore diameter of 340 nm was obtained.

[0064](c) The chloromethylation method of three-dimensional ordered macroporous cross-linked polyst...

Embodiment 3

[0070] Preparation of Chelating Resin Containing 4-Amino-Triazole with Average Pore Diameter of 460nm

[0071] (a) The preparation of the silica template refers to the step (a) of Example 1, except that the addition of reagents is changed to 13.8 g of dehydrated alcohol, 7.5 g of ammonia water with a percentage concentration of 25%, 12.5 g of distilled water, and ethyl orthosilicate. 13.8g. A silica template with an average particle diameter of 500 nm was obtained.

[0072] (b) The preparation method of the three-dimensional ordered macroporous cross-linked polystyrene is the same as the step (b) of Example 1, except that the initiator is 0.0164g tert-butyl peroxybenzoate, which is pre-polymerized at 60°C for 4 hours, at 80°C After reacting for 10 hours, a three-dimensional ordered macroporous cross-linked polystyrene with a pore diameter of 460 nm was obtained.

[0073] (c) The chloromethylation method of three-dimensional ordered macroporous cross-linked polystyrene is the...

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Abstract

The invention relates to a high molecular material, in particular to a preparation method for a three-dimensional ordered macroporous chelating resin used for absorbing precious metal ions in aqueoussolution. The method comprises the following steps: (a) preparation of a silica colloidal crystal template; (b) preparation of a three-dimensional ordered macroporous crosslinked polystyrene porous material; (c) chloromethylation of the three-dimensional ordered macroporous crosslinked polystyrene porous material; (d) introduction of a hydrophilic cantilever; and (e) introduction of chelation groups. Compared with the traditional polystyrene resin microspheres, the prepared three-dimensional ordered macroporous chelating resin has the advantages that the resistance force of the regularly arranged pore canal systems is small, the chelation groups introduced on the hydrophilic cantilever can be changed according to the variety of the concrete absorbed metal ions, so that the purpose of highadsorption capacity to different metal ions is achieved.

Description

technical field [0001] The technical solution of the invention relates to polymer materials, in particular to a preparation method of a three-dimensional ordered macroporous chelating resin for absorbing precious metal ions in aqueous solution. Background technique [0002] With the continuous development of industrial production and social economy, people use more and more types and quantities of precious metals, so waste and wastewater contain a large number of metal ions, some of which are expensive and rare, such as Ag + 、Au 3+ 、Pt 2+ 、Re 2+ etc. Some metal ions are toxic, such as Hg 2+ 、Cu 2+ , Pb 2+ Wait. If these metal ions are abandoned in wastewater and waste, it will damage the ecology and harm human health. In addition, seawater is also rich in metal ions needed by humans. Therefore, the separation and concentration of these metal ions from wastewater, waste, and seawater is very important economically and to human health. There are many methods for separa...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26
Inventor 张旭原丽霞曲佳燕刘宾元刘盘阁
Owner HEBEI UNIV OF TECH
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