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Metal organic framework structure-based fluorine removal agent and preparation method thereof

A technology for removing fluorine agent and metal salt, applied in the field of fluorine removing agent and its preparation, can solve the problems of low adsorption capacity, secondary pollution, aluminum loss, etc., and achieve the effects of high adsorption capacity, easy operation, and avoidance of structural stability

Active Publication Date: 2013-09-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used defluoridation agents on the market are activated carbon and activated alumina, which have the disadvantages of low adsorption capacity and secondary pollution caused by aluminum loss during use.

Method used

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  • Metal organic framework structure-based fluorine removal agent and preparation method thereof
  • Metal organic framework structure-based fluorine removal agent and preparation method thereof
  • Metal organic framework structure-based fluorine removal agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of metal salt solution: Dissolve 1 mol of aluminum nitrate in 1L of water to prepare a metal salt solution;

[0034] (2) Preparation of trimesic acid solution: Dissolve 1 mol of trimesic acid in 1 L of DMF solution to form a 1 mol / L trimesic acid solution;

[0035] (3) Preparation of metal-organic framework defluoridation agent: Mix the prepared metal salt solution and trimesic acid solution at a volume ratio of 1:1, then add it to a 100ml conical flask with a stopper, put it in an oven, and set it at 100°C Heating under the same conditions for 12 hours, then washing with DMF for several times, and drying in vacuum to obtain the powdered defluorinating agent Al-BTC.

[0036] figure 1 It is the result of characterizing the prepared target product with a scanning electron microscope (SEM), and the SEM photo clearly shows that the target product is composed of ellipsoidal particles smaller than 1 μm.

[0037] figure 2 is true figure 1 One of the resu...

Embodiment 2

[0041] (1) Preparation of metal salt solution: Dissolve 1 mol of aluminum oxalate in 1L of water to prepare a metal salt solution;

[0042] (2) Preparation of trimesic acid solution: Dissolve 0.8 mol of terephthalic acid in 1 L of DMSO solution to form a 0.8 mol / L terephthalic acid solution;

[0043] (3) Preparation of metal-organic framework defluorination agent: Mix the prepared metal salt solution and terephthalic acid solution at a volume ratio of 1:3, then add it to a 100ml conical flask with a stopper, put it in an oven at 90°C Heating under the conditions for 12 hours, then washing with DMSO for several times, and drying in vacuum to obtain a powdery defluorinating agent.

[0044]

Embodiment 3

[0046] (1) Preparation of metal salt solution: Dissolve 2mol of aluminum acetate in 1L of water to prepare a metal salt solution;

[0047] (2) Preparation of trimesic acid solution: Dissolve 2 mol of terephthalic acid in 1 L of ether solution to form a 2 mol / L terephthalic acid solution;

[0048] (3) Preparation of metal-organic framework defluoridation agent: Mix the prepared metal salt solution and terephthalic acid solution at a volume ratio of 1:2, then add it to a 100ml conical flask with a stopper, put it in an oven, and set it at 90°C Heating under the conditions for 36 hours, then washing several times with ether, and drying in vacuum to obtain a powdery defluorinating agent.

[0049]

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PUM

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Abstract

The invention relates to a fluorine removal agent and a preparation method thereof. The fluorine removal agent is prepared by carrying out mixing, atmospheric warming reaction, separation and vacuum drying to metal salt solution and polyhydroxy organic ligand solution which serve as raw materials, wherein the concentration of the metal salt solution is 0.1-5mol / L, the concentration of the polyhydroxy organic ligand solution is 0.1-5mol / L, and the mixing volume ratio of the metal salt .solution and the polyhydroxy organic ligand solution is (1:0.1)-(1:10). The fluorine removal agent realizes high adsorption capacity by interaction of metal ions and fluorine ions in a metal organic framework and more active sites provided by the framework structure, the secondary pollution caused by ion loss can be avoided by utilizing the high structural stability of the metal organic framework, and the fluorine removal agent can be widely applied to aspects of fluorine-containing sewage treatment, high-fluorine surface water purification and the like. The preparation method of the fluorine removal agent is carried out at an atmospheric pressure, thus being safe and reliable, less in equipment investment, simple in technique, easy to operate, and easy for realization of large-scale synthesis.

Description

technical field [0001] The invention relates to a defluorinating agent and a preparation method thereof, in particular to a metal organic framework-based defluorinating agent and a preparation method thereof. [0002] Background technique [0003] Metal-organic framework materials are a new type of functional materials, with large specific surface area, ordered pore structure, adjustable pore size, changeable coordination form and structure of central metal ions, convenient synthesis, and chemical modification according to the target requirements. Rich structure and other advantages. In recent years, the stability of metal-organic frameworks has been significantly improved, which makes them have attractive application prospects in many fields such as gas storage, separation, and catalysis, and has aroused great interest of many researchers. [0004] Fluorine is one of the essential trace elements for the human body, but when the daily intake of fluorine is too high, it wil...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 罗涛张楠通遇鑫遥金震贾勇孙柏刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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