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Preparation method and application of iron pillared montmorillonite composite catalyst

A composite catalyst, iron proppant technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of surface acid site reduction, nitrophenol wastewater pollution, etc.

Active Publication Date: 2021-09-10
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the deficiencies of the above-mentioned prior art, the present invention proposes a preparation method of iron pillared montmorillonite composite catalyst, the surface acid sites of the prepared iron pillared montmorillonite composite catalyst have been effectively reduced, more It is conducive to catalytic degradation of nitrophenol pollutants, and solves the pollution problem of nitrophenol wastewater

Method used

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  • Preparation method and application of iron pillared montmorillonite composite catalyst
  • Preparation method and application of iron pillared montmorillonite composite catalyst
  • Preparation method and application of iron pillared montmorillonite composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of Example 1 Iron Pillar Supported Montmorillonite Composite Material

[0036] (1) Preparation of montmorillonite suspension

[0037] Weigh 5 g of Na-montmorillonite (a purity of more than 90%, and a particle size of 100-200 mesh), disperse it in 245 mL of deionized water, and stir vigorously at room temperature (about 25°C) for 1 hour to obtain the content of Na-montmorillonite. 2% montmorillonite suspension;

[0038] (2) Preparation of iron pillar proppant

[0039] Weigh 5.3g Na 2 CO 3, slowly added to 250mL Fe(NO 3 ) 3 In aqueous solution (Na 2 CO 3 The concentration is 0.2mol / L), and vigorously stirred for 2h to form a translucent reddish-brown iron proppant solution, which was aged at room temperature for 24h;

[0040] (3) Preparation of iron pillared montmorillonite suspension:

[0041] Mix the montmorillonite suspension and iron pillared agent solution according to the ratio of [Fe] / Mt=10mmoL / g ([Fe] represents iron element), and then vigorou...

Embodiment 2

[0046] Preparation of Example 2 Iron Pillar Supported Montmorillonite Composite Material

[0047] (1) Preparation of montmorillonite suspension

[0048] Weigh 5 g of Na-montmorillonite (a purity of more than 90%, and a particle size of 100-200 mesh), disperse it in 245 mL of deionized water, and stir vigorously at room temperature (about 25°C) for 1 hour to obtain the content of Na-montmorillonite. 2% montmorillonite suspension;

[0049] (2) Preparation of iron pillar proppant

[0050] Weigh 2.65g Na 2 CO 3 , slowly added to 125mL Fe(NO 3 ) 3 solution, and vigorously stirred for 2 hours to form a translucent reddish-brown iron proppant solution, which was aged at room temperature for 24 hours;

[0051] (3) Preparation of iron-pillared montmorillonite suspension

[0052] The sodium-based montmorillonite suspension and the iron pillared montmorillonite suspension were mixed according to the ratio of [Fe] / Mt=5mmoL / g, then vigorously stirred for 2h to make it fully uniform ...

Embodiment 3

[0057] Preparation of Example 3 Iron Pillar Supported Montmorillonite Composite Material

[0058] (1) Preparation of montmorillonite suspension

[0059] Weigh 5 g of Na-montmorillonite (a purity of more than 90%, and a particle size of 100-200 mesh), disperse it in 245 mL of deionized water, and stir vigorously at room temperature (about 25°C) for 1 hour to obtain the content of Na-montmorillonite. 2% montmorillonite suspension;

[0060] (2) Preparation of iron pillar proppant

[0061] Weigh 7.95g Na 2 CO 3 , slowly added to 375mL Fe(NO 3 ) 3 aqueous solution and vigorously stirred for 2 hours to form a translucent reddish-brown iron proppant solution, and aged at room temperature for 24 hours;

[0062] (3) Preparation of iron-pillared montmorillonite suspension

[0063] Mix the montmorillonite suspension and the iron pillared montmorillonite solution at the ratio of [Fe] / Mt=15mmoL / g, then vigorously stir for 2h to make it fully uniform to obtain the iron pillared montm...

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of an iron pillared montmorillonite composite catalyst and application of the iron pillared montmorillonite composite catalyst. According to the invention, a ratio of montmorillonite to an iron pillaring agent is scientifically adjusted, and reasonable calcination (low-temperature calcination under the aerobic condition) is conducted, so the prepared iron pillared montmorillonite composite catalyst has the advantages that the montmorillonite keeps a relatively complete surface structure morphology, hematite with relatively good crystallization appears at the same time, and the conductivity of original materials is improved; and a certain amount of surface hydroxyl groups with certain strength are reserved and can can act with ferrous iron in a water phase to form a Fe (II) surface complex with high reduction activity, so the degradation of nitroaromatic pollutants is facilitated, and the pollution problem of nitrophenol wastewater is solved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method and application of an iron-pillared montmorillonite composite catalyst. Background technique [0002] The advancement of science and technology not only brings a lot of convenience to people, but also provides a variety of items. However, while people are enjoying the achievements of modernization, they often produce a large amount of waste gas, liquid and solid waste in production and life, that is, pollution. thing. The unreasonable discharge of pollutants makes harmful substances enter the soil, rivers, oceans, animals and plants with rainwater. In the interlocking ecological system, the pollution of harmful substances will probably cause ecological damage, so people must pay close attention to it. Water is the source of life. Water pollution will not only induce diseases and endanger human health, but also affect social productivity, resul...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J37/03B01J37/08C02F1/70C02F101/34C02F101/38
CPCB01J23/745B01J37/038B01J37/082C02F1/70C02F2101/345C02F2101/38Y02W10/10
Inventor 吴宏海卢鹏澄
Owner SOUTH CHINA NORMAL UNIVERSITY
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