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Organic-inorganic composite bentonite material and preparation method and application thereof

An inorganic composite and bentonite technology, applied in the direction of inorganic chemistry, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of large-scale popularization and application limitations, high cost of modification, environmental impact, etc., and achieve good adaptability and versatility , low reagent cost, good stability

Active Publication Date: 2017-10-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing methods, in order to realize that POSS material is introduced in bentonite structure, generally need to use organic solvent, and will carry out under high-speed stirring environment, but, the requirement of these two aspects not only makes modification cost higher (organic solvent cost and recycling, and high energy consumption), and the use of organic solvents will also have a certain impact on the environment
It can be seen that the existing methods have obvious shortcomings, and their large-scale promotion and application are greatly limited.

Method used

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  • Organic-inorganic composite bentonite material and preparation method and application thereof

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Experimental program
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Embodiment 1

[0038] This embodiment provides a kind of organic-inorganic composite bentonite material, the preparation process of this material is:

[0039] (1) Drop deionized water into 25wt% tetramethylammonium hydroxide solution at a stirring speed of 400rpm so that its concentration becomes 10wt%, and add the amount of orthosilicon etc. to it at a speed of 4mL / min. After the addition of ethyl acetate, stir at room temperature for 24 hours, then continue to stir in a water bath at 60°C for 10 hours, then concentrate it by rotary evaporation, place it in a refrigerator at 2°C for 12 hours, wash and filter the precipitated crystals with acetone , to obtain octapolytetramethylammonium cage silsesquioxane, namely POSS material;

[0040] (2) the bentonite of 10kg is added a certain amount of water to swell, and the bentonite suspension that is mixed with mass percentage concentration is 10wt%;

[0041] (3) Under the condition of stirring at 60° C., 3 wt % tetrabutylammonium bromide solution...

Embodiment 2

[0044] This embodiment provides a kind of organic-inorganic composite bentonite material, the preparation process of this material is:

[0045] (1) prepare POSS material by the step (1) of embodiment 1;

[0046] (2) prepare bentonite suspension by the step (2) of embodiment 1;

[0047] (3) Under the condition of stirring at 60° C., 1 wt % tetrabutylammonium bromide solution and 1 wt % POSS material solution were added dropwise thereto at a solid-to-liquid ratio of 1:10, and stirred for 2 hours. After filtering and drying, the organic-inorganic composite bentonite material sample (referred to as PTB-2) can be obtained.

[0048] The interlayer distance was determined by XRD Use 10.0g sample to adsorb methylene blue in 1L 1000ppm methylene blue aqueous solution, and after centrifugation after adsorption for 1h, measure the concentration of methylene blue aqueous solution in water, the result shows that the adsorption rate is 93.6%. Under the same experimental conditions, the ...

Embodiment 3

[0050] This embodiment provides a kind of organic-inorganic composite bentonite material, the preparation process of this material is:

[0051] (1) prepare POSS material by the step (1) of embodiment 1;

[0052] (2) prepare bentonite suspension by the step (2) of embodiment 1;

[0053] (3) Under stirring condition at 90 DEG C, dropwise add 3wt% hexadecyldimethylbenzyl ammonium chloride solution and 5wt% POSS material solution in the ratio of 1:10 by solid-liquid ratio, stir 6 Hour. After filtering and drying, the organic-inorganic composite bentonite material sample (referred to as PHB-1) can be obtained.

[0054] The interlayer distance was determined by XRD According to the measurement results of nitrogen physical adsorption and desorption instrument, it can be seen that the specific surface area A=10.26m 2 / g, pore volume V=0.0703cm 3 / g. Analysis of its thermal stability found that compared with the original soil, the maximum endothermic peak of surface hydroxyl col...

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Abstract

The invention provides an organic-inorganic composite bentonite material and a preparation method and application thereof; the preparation method refers to: modifying bentonite via octapolytetramethylammonium polyhedral oligomeric silsesquioxane and a surfactant in an aqueous system. Compared with existing methods of modifying bentonite via POSS (polyhedral oligomeric silsesquioxane) materials, the method provided herein has simple process and low energy consumption and reagent costs, is environmentally friendly, and is suitable for large-scale production; therefore, the method has a promising practical application prospect. By using the method provided herein, bentonite is compositely modified via the POSS material and the surfactant, and high content of organic carbon in organic bentonite is imparted at the premise of maintaining high thermostability of inorganic pillared bentonite. Therefore, the prepared bentonite has good interlamellar spacing and stability, and has good applicability and universality especially to cationic dye wastewater.

Description

technical field [0001] The invention belongs to the field of bentonite processing and application, and in particular relates to an organic-inorganic composite bentonite material and its preparation method and application. Background technique [0002] Bentonite, English name: Bentonite, also known as bentonite, bentonite or bentonite, is a water-containing clay mineral with montmorillonite as the main component. The common bentonite color is white and light yellow, and its particles have oil, Earthy or waxy sheen. The most mineral content in bentonite is montmorillonite, which can reach 60%-90%, and may contain a small amount of illite, kaolinite, halloysite, quartz, cristobalite, zeolite, chlorite, potassium feldspar, etc. Minerals such as albite, albite, calcite, etc., these impurities have a certain influence on the properties of bentonite. [0003] Bentonite not only has a certain layer spacing and specific surface area, but also has other excellent properties, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30C02F103/30
Inventor 郭巧霞孟波申宝剑任申勇
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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