Inorganic-organic composite bentonite material, and preparation method and application thereof

A technology of bentonite and aluminum pillared bentonite, applied in the direction of inorganic chemistry, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of easy detachment of surfactants, difficult biodegradation, weak action force, etc. Effect of low pore volume and production cost

Active Publication Date: 2015-10-14
PETROCHINA CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak interaction between the organic modifier and bentonite, the surfactant is easy to fall of...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The invention provides a kind of inorganic-organic composite bentonite material, the preparation process of this material is:

[0049] (1) AlCl with a concentration of 0.2mol / L 3 ·6H 2 The O solution was placed in a water bath at 80°C, and NaOH solution with an equal volume concentration of 0.48mol / L was added dropwise thereto under constant stirring at 500rpm. After the addition was completed, the stirring was continued for 4h, and then it was taken out from the water bath and left to stand at room temperature. Place and age for 24 hours to obtain aluminum trimer pillar support liquid;

[0050] (2) Disperse bentonite in water to form a bentonite suspension with a concentration of 5% by mass, and add aluminum tridepolymer pillar liquid dropwise to it at a ratio of 10 mol / kg to alumina under stirring conditions at 80°C Continue to stir for 4h after the dropwise addition is completed, then obtain aluminum thirteen polymer pillared bentonite through suction filtrat...

Embodiment 2

[0055] The invention provides a kind of inorganic-organic composite bentonite material, the preparation process of this material is:

[0056] (1) prepare aluminum thirteen polymer pillared bentonite by the conditions of embodiment 1;

[0057] (2) 1 part (molar weight) commercially available chitosan of degree of deacetylation ≥ 80% is dissolved in the aqueous acetic acid solution of 2% (volume percentage) with concentration, stirs, and after dissolving completely, under the condition of stirring Add 0.1mol / L sodium hydroxide solution dropwise to precipitate chitosan, and obtain a filter cake by suction filtration; add 5 parts (molar weight) Glycidyltrimethylammonium chloride, then add water to it and adjust the pH=8-9 with an appropriate amount of sodium hydroxide solution, react at 70°C for 16h, the solution is precipitated with acetone, filtered with suction, and dried at low temperature to obtain chitosan Quaternary ammonium salt;

[0058] (3) Dispersing 20 parts by wei...

Embodiment 3

[0061] The invention provides a kind of inorganic-organic composite bentonite material, the preparation process of this material is:

[0062] (1) AlCl with a concentration of 0.4mol / L 3 ·6H 2 The O solution was placed in a water bath at 80°C, and NaOH solution with an equal volume concentration of 0.96mol / L was added dropwise thereto under the condition of constant stirring at 500 rpm. Place and age for 32 hours to obtain aluminum trimer pillared liquid;

[0063] (2) Disperse bentonite in water to form a bentonite suspension with a mass percent concentration of 10%, and add aluminum trimer pillar support solution dropwise at a ratio of 15 mol / kg to alumina under stirring conditions at 80°C Continue to stir for 5h after the dropwise addition is completed, then obtain aluminum thirteen polymer pillared bentonite through suction filtration, washing, drying, and pulverizing, and measure its specific surface area through a nitrogen physical adsorption desorption instrument ...

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Abstract

The invention provides an inorganic-organic composite bentonite material, and a preparation method and an application of the inorganic-organic composite bentonite material. The inorganic-organic composite bentonite material is prepared through the following step: reacting Al-pillared bentonite with chitosan quaternary ammonium salt, the mass ratio of which is 1:0.1-0.5, at 50-90 DEG C for 3-8 h to prepare chitosan quaternary ammonium salt-Al-pillared bentonite. Through inorganic modification, the specific surface area, pore volume, and stability of bentonite are increased, and further through organic modification, the bentonite is provided with a relatively high organic carbon content, and the ability of adsorbing organic matters of the bentonite is increased. The inorganic-organic composite bentonite material provided in the invention can be used for water treatment, has characteristics of high efficiency and safety, and is a novel environment-friendly bentonite material free of secondary pollution.

Description

technical field [0001] The invention belongs to the field of bentonite processing and application, and in particular relates to an inorganic-organic composite bentonite material and its preparation method and application. Background technique [0002] Bentonite (bentonite), also known as bentonite or bentonite, is a clay rock-montmorillonite clay rock with montmorillonite as the main component. Rock etc. [0003] The bentonite unit cell particles are small and have a large specific surface area. In addition, it has many excellent physical and chemical properties, including cohesiveness, adsorption, catalytic activity, thixotropy, plasticity, lubricity, and cation exchange. The interlayer domain of bentonite structure is mainly filled by exchangeable inorganic hydrated cations and water molecules, and the regulation of its structure and properties has become a research hotspot in recent years. Through ion exchange, cross-linked pillars and other methods, the interlayer spac...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28
Inventor 郭巧霞林辉季德伟胡乙川孟波王凯赵文军申宝剑任申勇
Owner PETROCHINA CO LTD
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