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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 destroying the pore structure of the precursor, complicated process, and high energy consumption, so as to achieve simple process and reduce energy consumption , the effect of good adsorption performance

Inactive Publication Date: 2013-05-01
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 prepared. 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 relates to a preparation method of amino-functionalized mesoporous alumina-based bifunctional adsorbent, and the application of the bifunctional adsorbent. The method comprises the steps of: adding concentrated nitric acid or concentrated hydrochloric acid into the ethanol solution of a Pluronic triblock copolymer P123 or F127 at the room temperature, evenly stirring and adding aluminium isopropoxide into the mixed solution; carrying out constant temperature evaporation on the solution formed by stirring to obtain mesoporous alumina-P123 / F127 composite raw powder; adding the raw powder into the ethanol solution of tetraethylenepentamine, polyethyleneimine or triethanolamine; and sequentially carrying out mixing impregnation, centrifugal separation, ethanol washing and drying at the room temperature to obtain the adsorbent. The preparation method has the advantages of simple technology, template agent removal, amino-functionalization one-step completion and the like; and the amino-functionalized mesoporous alumina-based bifunctional adsorbent has good adsorptive property for Cr (VI) and CO2, especially has the removal rate of more than 90% for the Cr (VI) within 1min, and has the removal rate of 100% for the Cr (VI) solution with the concentration of less than 50mg / L.

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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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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