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A kind of modified montmorillonite, its preparation method and application

A technology of montmorillonite and sodium-based montmorillonite, which can be used in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., and can solve the problems of low adsorption capacity of methyl orange.

Active Publication Date: 2021-07-27
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the current research results, it is found that the adsorption capacity of montmorillonite to methyl orange is still relatively low after being modified by gemini quaternary ammonium salts, such as Bo Liu et al. , Rapid modification of montmorillonite with novel cationic Gemini surfactants and its adsorption formethyl orange, Materials Chemistry & Physics, 2011, 130 (3): 1220-1226.) Gemini quaternary ammonium surfactant 18-3-18 (C 43 h 92 N 2 Cl 2 , molecular weight 707) to prepare organic montmorillonite by microwave radiation for 1h, the maximum interlayer distance of the obtained organic montmorillonite (18-3-18-Mt) is only 2.31nm, and the highest adsorption capacity of methyl orange is only 50mg / around g

Method used

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  • A kind of modified montmorillonite, its preparation method and application
  • A kind of modified montmorillonite, its preparation method and application
  • A kind of modified montmorillonite, its preparation method and application

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Embodiment 1

[0027] An embodiment of the preparation method of the modified montmorillonite of the present invention, the preparation method comprises the following steps: first dissolving dioctadecyltetrahydroxyethyldibromopropylenediammonium in 80mL water to obtain dioctadecyl Tetrahydroxyethyldibromopropylenediammonium aqueous solution; then 4.0g commercially available sodium montmorillonite was directly dispersed in 70mL water without treatment, and then slowly added dioctadecyltetrahydroxyethyldibromopropylenediammonium aqueous solution , to obtain a suspension, then place the suspension in a microwave reactor, set the microwave power to 800W, the reaction temperature to 85°C, and the reaction time to 1h. After the reaction, the precipitate is collected by centrifugation, and the precipitate is washed with water until after washing solution with AgNO 3 No bromide ion was detected in the solution reaction, and then the cleaned precipitate was freeze-dried at -40°C, and then ground and ...

Embodiment 2

[0029] A kind of embodiment of the preparation method of modified montmorillonite of the present invention; In this preparation method, except that the consumption of dioctadecyl tetrahydroxyethyl dibromopropylene diammonium is 1.0 times of the cation exchange capacity of sodium montmorillonite (i.e. 1.0CEC), other are all identical with embodiment 1.

Embodiment 3

[0031] A kind of embodiment of the preparation method of modified montmorillonite of the present invention; In this preparation method, except that the consumption of dioctadecyl tetrahydroxyethyl dibromopropylene diammonium is 1.5 times of the cation exchange capacity of sodium montmorillonite (i.e. 1.5CEC), others are the same as in Example 1.

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Abstract

The invention relates to a modified montmorillonite, its preparation method and application. The preparation method of the modified montmorillonite of the present invention uses dioctadecyltetrahydroxyethyldibromide propylene diammonium to carry out microwave modification treatment on the sodium-based montmorillonite to obtain a modified montmorillonite with a larger layer spacing, which is Organic pollutants provide more adsorption space, and at the same time, due to the introduction of the hydrophobic group and cationic group of dioctadecyl tetrahydroxyethyl dibromopropylene diammonium to the modified montmorillonite, its hydrophobicity is enhanced. The surface is positively charged, and there is an electrostatic interaction with anionic pollutants, so that the modified montmorillonite can effectively remove organic pollutants in wastewater, especially methyl orange, and the modified montmorillonite can effectively remove methyl orange The adsorption capacity can be as high as 200mg / g or more.

Description

technical field [0001] The invention belongs to the field of solid materials and water treatment, and relates to a modified montmorillonite, its preparation method and its application. Background technique [0002] At present, most of the dyes used in industry are synthetic dyes, which contain a lot of toxic and non-biodegradable organic compounds. Once untreated dye wastewater is discharged into the natural environment, it will cause severe environmental pollution challenges and even threaten human life. Therefore, the development of organic matter treatment technology in synthetic dye wastewater has received extensive attention from researchers. Methyl orange (MO) is a water-soluble azo compound. As a representative dye, it often exists in dye wastewater. There are many ways to treat dye wastewater, among which adsorption method is an economical, efficient, and relatively environmentally friendly restoration method, and it is also one of the most commonly used wastewater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/30
CPCB01J20/12B01J20/22C02F1/288C02F2101/308
Inventor 郑成彭思玉毛桃嫣陈睿
Owner GUANGZHOU UNIVERSITY