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Preparation method and application of amino-functionalized mesoporous alumina-based bifunctional adsorbent

An amino-functional, alumina-based technology, applied in chemical instruments and methods, through adsorption, separation methods, etc., can solve the problems of complex process, destroying the pore structure of precursors, and consuming large energy, achieving simple process and reducing energy consumption. , the effect of good adsorption performance

Inactive Publication Date: 2014-10-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method first needs to prepare the mesoporous molecular sieve carrier, and then prepare the product through the impregnation process. The process is more complicated, and the process of roasting the template agent will consume a lot of energy and destroy the pore structure of the precursor.

Method used

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  • Preparation method and application of amino-functionalized mesoporous alumina-based bifunctional adsorbent
  • Preparation method and application of amino-functionalized mesoporous alumina-based bifunctional adsorbent
  • Preparation method and application of amino-functionalized mesoporous alumina-based bifunctional adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0028]First, 3 g of P123 was dissolved in 20 ml of ethanol with thorough stirring at room temperature. Next, add 1.5ml, 65wt% concentrated nitric acid, stir and mix evenly at room temperature. Then, 3.06g of aluminum isopropoxide was added and fully dissolved under stirring at room temperature to obtain a transparent solution. Put the above transparent solution into an oven at 60°C, and evaporate at a constant temperature for 48 hours to obtain the original powder of mesoporous alumina—P123. Further, stir and dissolve 3g of tetraethylenepentamine in 20ml of ethanol at room temperature to form an ethanol solution of tetraethylenepentamine, and add 3g of mesoporous alumina—P123 raw powder, fully stir and impregnate at room temperature for 24 hours, and then centrifuge Separation, washing with ethanol and drying at 80°C for 12 hours, the amino-functionalized mesoporous alumina-based composite material was obtained. The as-prepared amino-functionalized mesoporous alumina-based c...

Embodiment 2

[0031] First, 1 g of F127 was dissolved in 20 ml of ethanol with thorough stirring at room temperature. Next, 1.5ml of 37wt% concentrated hydrochloric acid was added, and stirred and mixed evenly at room temperature. Then, 2.04 g of aluminum isopropoxide was added and fully dissolved under stirring at room temperature to obtain a transparent solution. Put the above transparent solution into an oven at 60°C and evaporate at constant temperature for 48 hours to obtain the original powder of mesoporous alumina—F127. Further, stir and dissolve 4g of triethanolamine in 100ml of ethanol at room temperature to form an ethanol solution of triethanolamine, add 2g of mesoporous alumina—F127 raw powder, fully stir and impregnate at room temperature for 12 hours, then centrifuge and wash with ethanol and drying at 100° C. for 6 h to prepare an amino-functionalized mesoporous alumina-based adsorption material. The as-prepared amino-functionalized mesoporous alumina-based composites exhib...

Embodiment 3

[0034] First, a mixture of 0.4 g of P123 and 0.4 g of F127 was dissolved in 10 ml of ethanol with thorough stirring at room temperature. Next, add 0.9ml, 37wt% concentrated hydrochloric acid, stir and mix evenly at room temperature. Then, 1 g of aluminum isopropoxide was added and fully dissolved under stirring at room temperature to obtain a transparent solution. Put the above transparent solution in an oven at 60°C, and evaporate at constant temperature for 48 hours to obtain the original powders of mesoporous alumina—P123 and F127. Further, stir and dissolve 5 g of polyethyleneimine in 50 ml of ethanol at room temperature to form an ethanol solution of polyethyleneimine, and add 1.1 g of mesoporous alumina—P123 and F127 raw powder, and fully stir and impregnate at room temperature for 6 hours. After centrifugation, ethanol washing and drying at 60°C for 12 hours in sequence, the amino-functionalized mesoporous alumina-based adsorption material was prepared. The as-prepare...

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Abstract

The invention is a preparation method and application of an amino functionalized mesoporous alumina-based bifunctional adsorbent. The method is: add concentrated nitric acid or concentrated hydrochloric acid to the ethanol solution of Pluronic triblock copolymer P123 or F127 at room temperature, add aluminum isopropoxide after stirring evenly, and evaporate the solution formed by stirring at a constant temperature to obtain mesoporous alumina— P123 or F127 composite original powder; then the original powder is added to the ethanol solution of tetraethylenepentamine, polyethyleneimine or triethanolamine, and then stirred and impregnated, centrifuged, washed with ethanol and dried at room temperature to obtain the adsorption agent. The present invention has the advantages of simple process, template removal and amino functionalization in one step, and the adsorbent has good adsorption performance on Cr(VI) and CO2, especially the removal rate of Cr(VI) within 1 min can reach More than 90%, the removal rate of Cr(VI) concentration less than 50mg / L solution can reach 100%.

Description

technical field [0001] The present invention relates to the technical field of preparation and application of supported alumina composite materials, specifically a method for the highly toxic pollutant Cr(VI) and the main greenhouse gas CO 2 Preparation method and application of adsorbed amino-functionalized mesoporous alumina-based bifunctional composite adsorbent. Background technique [0002] Heavy metal chromium pollution mainly comes from mining, chemical, electroplating, leather and other industrial wastewater and landfill leachate. The valence states of chromium in the water environment are mainly Cr(III) and Cr(VI), among which Cr(VI) is generally represented by Cr 2 o 4 2- 、Cr 2 o 7 2- and CrO 4 2- Three anionic forms exist and are affected by conditions such as organic matter in the water, redox species, temperature and hardness. The toxicity of different chromium compounds is different, and the toxicity of Cr(VI) is the most, its toxicity is 100 times tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02C02F1/28C02F1/62C02F101/22
CPCY02C10/08Y02C20/40
Inventor 蔡卫权谈立君余家国程蓓弗朗西斯·沃波特
Owner WUHAN UNIV OF TECH
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