Tungstate ionic liquid, preparation method thereof and application of tungstate ionic liquid in catalytic oxidation degradation of phenol and derivatives thereof in wastewater

A technology of tungstate ion and oxidative degradation, which is applied in the fields of oxidized water/sewage treatment, water pollutants, chemical instruments and methods, etc.

Active Publication Date: 2022-08-02
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the direct use of ionic liquids to catalyze the oxidation degradation of high-concentration phenols in wastewater.

Method used

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  • Tungstate ionic liquid, preparation method thereof and application of tungstate ionic liquid in catalytic oxidation degradation of phenol and derivatives thereof in wastewater
  • Tungstate ionic liquid, preparation method thereof and application of tungstate ionic liquid in catalytic oxidation degradation of phenol and derivatives thereof in wastewater
  • Tungstate ionic liquid, preparation method thereof and application of tungstate ionic liquid in catalytic oxidation degradation of phenol and derivatives thereof in wastewater

Examples

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Effect test

Embodiment 1

[0043] A preparation of tungstate ionic liquid and a method for catalyzing and oxidatively degrading phenol, comprising the following steps:

[0044] 1) Silver tungstate was prepared by mixing sodium tungstate with silver nitrate aqueous solution at room temperature, washed and dried under vacuum at 80°C for 4h.

[0045] 2) The sodium tungstate and silver nitrate in step 1) are mixed according to the molar ratio of 1:1.

[0046] 3) The silver tungstate prepared in step 1) and the aqueous solution of dodecyl trimethyl quaternary ammonium bromide are mixed according to the molar ratio of silver tungstate and dodecyl trimethyl quaternary ammonium bromide 1:2, and stirred for 2h , filtered, washed three times with ether after concentration, and finally rotary-evaporated and vacuum-dried at 80 °C overnight to obtain tungstate ionic liquid. Its thermogravimetric analysis results are as follows figure 1 shown.

[0047] 4) Choose 50g L -1 The phenol aqueous solution is used as a r...

Embodiment 2

[0050] A preparation of tungstate ionic liquid and a method for catalytic oxidation degradation of nitrophenol, comprising the following steps:

[0051] 1) The silver tungstate was prepared by mixing sodium tungstate with silver nitrate aqueous solution at room temperature, and after washing, it was vacuum-dried at 90 °C for 4 h.

[0052] 2) The sodium tungstate and silver nitrate in step 1) are mixed according to the molar ratio of 1:2.

[0053] 3) The silver tungstate prepared in step 1) and the aqueous solution of decyltrimethylimidazolium chloride are mixed according to the molar ratio of silver tungstate and decyltrimethylimidazolium chloride 1:2, stirred for 4h, filtered and concentrated After washing three times with ether, finally rotary evaporation and vacuum drying at 100 °C overnight to obtain tungstate ionic liquid.

[0054] 4) Choose 20g L -1 The nitrophenol aqueous solution is used as reactant, the molar ratio of decyl trimethyl quaternary imidazole tungstate a...

Embodiment 3

[0057] A preparation of tungstate ionic liquid and a method for catalytic oxidation degradation of trichlorophenol, comprising the following steps:

[0058] 1) The silver tungstate was prepared by mixing sodium tungstate with silver nitrate aqueous solution at room temperature, washed and dried under vacuum at 60°C for 4h.

[0059] 2) The sodium tungstate and silver nitrate in step 1) are mixed according to the molar ratio of 1:1.

[0060] 3) The silver tungstate prepared in step 1) and the aqueous solution of hexadecyltrimethyl quaternary phosphonium chloride are mixed according to the molar ratio of silver tungstate and hexadecyltrimethyl quaternary phosphonium chloride 1:2, and stirred for 6h , filtered, washed three times with ether after concentration, and finally rotary-evaporated and vacuum-dried at 110 °C overnight to obtain tungstate ionic liquid.

[0061] 4) Choose 80g L -1 The trichlorophenol aqueous solution is used as reactant, the molar ratio of hexadecyltrimet...

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Abstract

The invention discloses tungstate ionic liquid, a preparation method thereof and application of the tungstate ionic liquid in catalytic oxidation degradation of phenol and derivatives thereof in wastewater. The preparation method of the tungstate ion liquid comprises the following steps: mixing sodium tungstate with a silver nitrate aqueous solution for reaction to obtain silver tungstate, mixing the obtained silver tungstate with the ion liquid for reaction, filtering after the reaction is ended, and concentrating, washing and drying the obtained filtrate to obtain the tungstate ion liquid. The tungstate ion liquid is used as a catalyst for oxidative degradation reaction. The method for catalytically oxidizing and degrading phenol and / or derivatives thereof by adopting the tungstate ionic liquid comprises the following steps: mixing phenol and / or derivatives thereof or wastewater containing phenol and / or derivatives thereof with the tungstate ionic liquid and hydrogen peroxide, and reacting to oxidize and degrade phenol and / or derivatives thereof. The tungstate ionic liquid can purify high-concentration phenol-containing wastewater, only the ionic liquid and water are generated after reaction, and the ionic liquid and the water can be recycled.

Description

technical field [0001] The invention relates to a tungstate ionic liquid, a preparation method and application thereof, in particular to a tungstate ionic liquid, a preparation method thereof and the application of catalytic oxidation degradation of phenol and its derivatives in wastewater, and more particularly to a tungstate ion liquid The invention discloses a liquid, a preparation method and application thereof, and a method for catalyzing oxidation and degrading phenol or a derivative thereof by a tungstate ionic liquid, belonging to the fields of green chemistry and environmental chemistry. Background technique [0002] With the continuous advancement of industrialization, wastewater discharge has caused serious environmental pollution. Many industrial processes, such as coal, petrochemical, plastics, and rubber, emit phenol-containing wastewater. These wastewaters not only directly endanger the safety of the ecological environment, but also pollute human drinking wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C02F1/72C02F101/34
CPCB01J31/0279B01J31/0284B01J31/0288B01J31/0282C02F1/725C02F1/722C02F2101/345
Inventor 樊红雷韩布兴杨冠英
Owner INST OF CHEM CHINESE ACAD OF SCI
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