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Preparation method of bis-salicylaldehyde o-phenylenediamine modified resin for uranium extraction from salt lake

The technology of salicylaldehyde acetal o-phenylenediamine and modified resin is applied in the field of uranium adsorption, can solve the problems of difficulty in uranium extraction, poor uranium absorption performance, etc., and achieves the effects of simple preparation method and good material performance.

Active Publication Date: 2018-01-09
BEIJING RES INST OF CHEM ENG & METALLURGY
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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of salicylaldehyde ortho-phenylenediamine modified resin for extracting uranium from salt lakes, so as to solve the difficulty in extracting uranium from high-salt and low-uranium water systems such as salt lakes or seawater in the prior art , The problem of poor uranium absorption performance of adsorption materials in high-salt and low-uranium water systems

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  • Preparation method of bis-salicylaldehyde o-phenylenediamine modified resin for uranium extraction from salt lake

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preparation example Construction

[0024] A preparation method of salicylaldehyde ortho-phenylenediamine modified resin for extracting uranium from salt lake, comprising the following steps:

[0025] Synthesis of step 1 styrene-divinylbenzene copolymer crosslinked microspheres:

[0026] In the state of heating and stirring, slowly add the organic phase containing styrene, divinylbenzene, benzoyl peroxide, and isooctane to the aqueous phase in which gelatin is dissolved, and stir the reaction at 60-105°C 7 -24h;

[0027] After the reaction is over, the copolymer crosslinked microspheres are separated from the solution by suction filtration, and the microspheres are washed with water; the washed microspheres are added to boiling water and boiled for 1-2 hours to remove organic residues, filtered and dried to obtain Product styrene-divinylbenzene crosslinked microspheres;

[0028] Steps for the synthesis of dichloromethylated copolymer crosslinked microspheres:

[0029] Take M 1 g styrene-divinylbenzene crossl...

Embodiment 1

[0044] (1) Synthesis of styrene-divinylbenzene copolymer crosslinked microspheres;

[0045] Preparation of the monomer phase: add 31.3g styrene and 8.7g divinylbenzene (50% content) into a 200mL beaker, then add 0.48g benzoyl peroxide and 80g isooctane, stir and mix evenly.

[0046] Preparation of the dispersed phase: Add 300mL of deionized water into a 1L three-neck bottle, then add 3g of gelatin, start stirring and heat to dissolve the gelatin.

[0047] With the heating and stirring turned on, slowly add the monomer phase to the dispersed phase; stir and react at 60°C for 7 hours; after the reaction, use suction filtration to separate the copolymer crosslinked microspheres from the solution, washing the microspheres; adding the washed microspheres to boiling water for 1 hour to remove residual organic matter, filtering and drying to obtain the product styrene-divinylbenzene crosslinked microspheres;

[0048] (2) Synthesis of chloromethylated copolymer crosslinked microspher...

Embodiment 2

[0058] (1) Synthesis of styrene-divinylbenzene copolymer crosslinked microspheres

[0059] Preparation of the monomer phase: add 31.3g styrene and 13.7g divinylbenzene (50% content) into a 2L beaker, then add 0.54g benzoyl peroxide and 90g isooctane, stir and mix evenly;

[0060] Preparation of dispersed phase: Add 300mL deionized water to a 1L three-necked bottle, then add 3g of gelatin, start stirring and heat to dissolve the gelatin;

[0061] With heating and stirring turned on, the monomer phase was slowly added to the dispersed phase; and cured at 105° C. for 24 hours. After the reaction, the copolymer cross-linked microspheres were separated from the solution by suction filtration, and the microspheres were washed with water; the washed microspheres were added to boiling water and boiled for 2 hours to remove the pore-forming agent isooctane, and the solid-liquid separation and drying to obtain the product styrene-divinylbenzene copolymer crosslinked microspheres;

[0...

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Abstract

The invention relates to a preparation method of bis-salicylaldehyde o-phenylenediamine modified resin for uranium extraction from a salt lake. The preparation method comprises the following steps: step I, synthesizing styrene-divinylbenzene copolymer cross-linked microspheres; step II, synthesizing chloromethylation copolymer cross-linked microspheres; step III, performing the functionalized reaction of ethylenediamine of the chloromethylation copolymer cross-linked microspheres; and step IV, synthesizing the bis-salicylaldehyde o-phenylenediamine modified resin. According to the preparationmethod of the chelated resin for the uranium extraction from the salt lake, the bis-salicylaldehyde o-phenylenediamine modified resin for the uranium extraction from the salt lake is successively prepared by utilizing chemical modification reaction, the preparation method is simple, and the material performance is good.

Description

technical field [0001] The invention belongs to the technical field of uranium adsorption, and in particular relates to a preparation method of a salicylaldehyde-o-phenylenediamine-modified resin suitable for extracting uranium from salt lakes. Background technique [0002] As a relatively mature energy type in technology, nuclear power can effectively solve the problems of environmental pollution and resource scarcity caused by fossil fuels such as oil and coal. my country has also timely put forward a plan to vigorously develop nuclear power, and plans to increase the proportion of nuclear power in my country to about 10% of the total power generation before 2020. However, the current situation is that the development of nuclear power in my country is still at a relatively low level. As of the end of 2011, my country's nuclear power accounted for only 1.2% of total power generation, which is a huge gap compared with western developed countries. Due to the relative scarci...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F8/32C08F8/24B01J13/14B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 任宇陈树森勾阳飞
Owner BEIJING RES INST OF CHEM ENG & METALLURGY
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