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Preparation method of light rare earth ion imprinted adsorbent for treating rare earth wastewater

A technology of ion imprinting and rare earth ions, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of great harm to human health, achieve strong adsorption capacity, effective enrichment and separation, and improve The effect of adsorption capacity

Inactive Publication Date: 2015-04-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth ions such as lanthanum and europium contained in the wastewater discharged from the smelting of rare earth ores are very harmful to human health. The traditional treatment methods for rare earth metal wastewater can no longer meet the requirements of both metal recovery and water reuse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 4g of surfactant P123(EO 20 PO 70 EO 20 ) was dissolved in 120ml of hydrochloric acid solution (2M), stirred vigorously for 10 hours, then slowly added 11.3g of tetraethyl orthosilicate (TEOS) dropwise, then continued to stir vigorously for 24h, and then moved into a high-pressure reactor with a polytetrafluoroethylene substrate , reacted at 100° C. for 24 h, cooled to room temperature, and obtained a mesoporous molecular sieve precursor suspension.

[0020] (2) Put 1.5g La 2 o 3 Dissolve in 15ml of hydrochloric acid solution (2M), then slowly drop 1.2g of 3-aminopropyltrimethoxysilane into the solution to prepare an acidic mixed solution of aminosilane containing lanthanum ions, and then add the mixed solution under stirring into the mesoporous molecular sieve precursor suspension, and then the solution was hydrothermally reacted at 100°C for 15 hours, cooled to room temperature, suction filtered, washed, and dried at 100°C for 3 hours to obtain a solid pow...

Embodiment 2

[0024] (1) Add 2g of surfactant P123(EO 20 PO 70 EO 20 ) was dissolved in 60ml of hydrochloric acid solution (2M), stirred vigorously for 10 hours, then slowly added 6g of tetraethyl orthosilicate (TEOS) dropwise, then continued to stir vigorously for 24h, and then moved into a high-pressure reactor with a polytetrafluoroethylene substrate, React at 100° C. for 15 h, and cool to room temperature to obtain a mesoporous molecular sieve precursor suspension.

[0025] (2) First put 0.65g CeO 2 Dissolve in 10ml of hydrochloric acid solution (1.5M), then slowly add 1g of N -(2-aminoethyl)-3-aminopropyltrimethoxysilane is added to the solution to prepare an acidic mixed solution of aminosilane containing cerium ions, and then the mixed solution is added to the mesoporous molecular sieve precursor suspension under stirring conditions, The solution was then subjected to hydrothermal reaction at 80° C. for 24 hours, cooled to room temperature, suction filtered, washed, and dried at ...

Embodiment 3

[0029] (1) Add 3g of surfactant P123(EO 20 PO 70 EO 20 ) was dissolved in 80ml of hydrochloric acid solution (2M), stirred vigorously for 10 hours, then slowly added 8g of tetraethyl orthosilicate (TEOS) dropwise, then continued to stir vigorously for 24h, and then moved into a high-pressure reactor with a polytetrafluoroethylene substrate, React at 100° C. for 20 h, and cool to room temperature to obtain a mesoporous molecular sieve precursor suspension.

[0030] (2) Put 1.6g Nd first 2 o 3Dissolve in 10ml of nitric acid solution (2M), and then slowly drop 1.8g of 3-aminopropyltrimethoxysilane into the solution to prepare an acidic mixed solution of aminosilane containing neodymium ions, and then add the mixed solution under stirring into the mesoporous molecular sieve precursor suspension, and then the solution was hydrothermally reacted at 90°C for 20 hours, cooled to room temperature, suction filtered, washed, and dried at 100°C for 3 hours to obtain a solid powder.

...

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PUM

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Abstract

The invention relates to a preparation method of a light rare earth ion imprinted mesoporous molecular sieve adsorbent for absorbing and recycling rare earth ion in wastewater. The preparation method comprises the following steps: firstly, taking tetraethyl orthosilicate as a silicon source and preparing a mesoporous molecular sieve precursor suspension; then inducing aminosilane to couple in the mesoporous molecular sieve precursor suspension by using rare earth imprinted ion, and forming a rare earth ion-aminosilane polymer-mesoporous molecular sieve compound; and finally, removing the rare earth ion in the compound and obtaining a rare earth ion imprinted mesoporous molecular sieve adsorbent. Through absorption materials obtained by the preparation method, the maximum absorption and recovery of the rare earth ion can be realized due to a synergistic effect of a high specific surface area of the molecular sieve and a three-dimensional cavity containing a function group which is specifically bonded with the rare earth imprinted ion.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and environmental protection, in particular to the technical field of adsorption materials for environmental pollution control, and specifically relates to a preparation method of a light rare earth ion imprinted mesoporous molecular sieve adsorbent for treating rare earth wastewater. Background technique [0002] my country is not only a big country with rare earth resources, but also has become a big country in the production, export and consumption of rare earths in the world. Due to the advancement of China's rare earth metallurgical technology and low cost, foreign rare earth smelting and separation enterprises have been shut down one after another, and related research has gradually decreased. my country's rare earth resources have obvious advantages, which provide very favorable conditions for the development of the rare earth industry. Since the mid-1980s, my country's rare e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
Inventor 殷好勇唐俊红严春杰
Owner HANGZHOU DIANZI UNIV
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