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Ferrum-containing mesoporous molecular sieve catalyst and application of Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid

A mesoporous molecular sieve and ionic liquid technology, applied in the field of waste treatment, can solve the problems of low degree of mineralization of organic matter, unreusable iron components, loss of iron components, etc., achieving good reusability and reducing iron content. The effect of shunting loss and low cost

Inactive Publication Date: 2013-07-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above studies have achieved good degradation efficiency, the traditional Fenton and Fenton-like methods have defects such as secondary pollution caused by the loss of iron components, iron components cannot be reused, and the degree of mineralization of organic matter is not high, which is not conducive to practical application.

Method used

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  • Ferrum-containing mesoporous molecular sieve catalyst and application of Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid
  • Ferrum-containing mesoporous molecular sieve catalyst and application of Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 4.0g template agent EO 20 PO 70 EO 20 , dissolved in 125mL of hydrochloric acid solution with a concentration of 1.9mol / L, stirred at 35°C for 2h until the solution was clear and transparent; under constant stirring, the precursor of the iron component was added; after it was dissolved, 7.8mL of ethyl orthosilicate was added dropwise For ester, adjust the pH of the solution to 3.5 with ammonia water, and stir at a constant speed for 24 hours at 38°C to make it fully react; add the reacted mixture to a hydrothermal kettle, and heat it at 130°C for 24 hours; After filtering and washing with high-purity water, the resulting solid was dried at 80°C for 12 hours; then put into a muffle furnace and calcined at 600°C for 5 hours to obtain SBA-15-coFe(NO 3 ) 3 sample;

[0022] (2) Prepare 200mL solution, in which the concentration of [HMIM]Br is 2.5mmol / L, H 2 o 2 The concentration is 400mmol / L, its pH is adjusted to 3.5, and it is added in 250mL photoreactor; U...

Embodiment 2

[0024] Adopt embodiment 1 gained catalyst SBA-15-coFe (NO 3 ) 3 , Degradation of [OMIM]Cl: prepare 200mL solution, wherein the concentration of [OMIM]Cl is 2.5mmol / L, H 2 o 2 The concentration is 400mmol / L, its pH is adjusted to 3.5, and it is added in 250mL photoreactor; Under the condition of stirring, add 0.2gSBA-15-coFe(NO 3 ) 3 Sample, the mixed solution was reacted under xenon lamp irradiation for 12h; after the reaction, the degradation rate was 87.21% as measured by high performance liquid chromatography.

Embodiment 3

[0026] (1) Weigh 8.0g template agent EO 20 PO 70 EO 20 , dissolved in 250mL of hydrochloric acid solution with a concentration of 1.9mol / L, stirred at 32°C for 3h until the solution was clear and transparent; under constant stirring, the precursor of the iron component was added; after it was dissolved, 15mL of ethyl orthosilicate was added dropwise , adjust the pH of the solution to 4 with ammonia water, stir at a constant speed for 20 hours at 40°C to make it fully react; add the reacted mixture into a hydrothermal kettle, and heat it at 110°C for 20 hours; wait for the reactant to cool to room temperature, and first filter it with suction Then washed with high-purity water, the obtained solid was dried at 100°C for 10h; then put into a muffle furnace and calcined at 500°C for 6h to obtain SBA-15-coFeCl 3-1 sample;

[0027] (2) Prepare 200mL solution, in which [BMIM]BF 4 The concentration is 2.5mmol / L, H 2 o 2 The concentration is 400mmol / L, its pH is adjusted to 3.5, ...

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Abstract

The invention discloses a Ferrum-containing mesoporous molecular sieve catalyst and application of the Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid. In order to reduce secondary pollution caused by Ferrum component loss and improve the catalyst repeated usability, the Ferrum-containing mesoporous molecular sieve catalyst is prepared by the steps of firstly loading a Ferrum component on a molecular sieve by an in-situ synthesis method or an immersion method and finally calcining a loaded sample, wherein the loading amount of the Ferrum component on the molecular sieve is 5 to 10 percent. The Ferrum-containing mesoporous molecular sieve is applied to catalytic degradation of the ionic liquid under visible light. The Ferrum-containing mesoporous molecular sieve catalyst is simple, feasible and low in cost; the catalyst is high in repeated usability; and the ionic liquid or waste containing the ionic liquid can be subjected to clean and high-efficiency visible light catalytic degradation.

Description

technical field [0001] The invention belongs to the field of waste treatment, and relates to an iron-containing mesoporous molecular sieve and its application, in particular to its application in catalytic degradation of ionic liquid under visible light. Background technique [0002] As a new type of high-efficiency green solvent, ionic liquid has the characteristics of extremely low vapor pressure, wide electrochemical window, wide operating temperature range, good thermal and chemical stability, and the performance of both solvent and catalyst. It is one of the hotspots of green chemistry research and has been widely used in organic synthesis, catalytic reaction, separation science, electrochemistry, biochemistry, physical chemistry, chemical engineering and other fields. Ionic liquids generally consist of relatively bulky organic cations with asymmetric structures and bulky inorganic anions. Among them, the imidazole ionic liquid composed of N, N'-dialkylimidazolium cati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035B01J29/76A62D3/17A62D101/26A62D101/28
Inventor 李雪辉马楠于英豪黄理荣
Owner SOUTH CHINA UNIV OF TECH