Preparation method of attapulgite clay nanorod crystal composite microsphere adsorbent

A technology of attapulgite clay and nanorod crystals, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve difficult separation, waste of attapulgite resources, and limited large-scale application, etc. question

Active Publication Date: 2016-03-09
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, attapulgite clay nanorod crystals exhibit excellent colloidal stability in water suspension systems, making it difficult to separate attapulgite clay nanorod crystals from water after adsorption saturation, resulting in waste of attapulgite resources and secondary damage to water bodies. pollution, which limits its large-scale application

Method used

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  • Preparation method of attapulgite clay nanorod crystal composite microsphere adsorbent
  • Preparation method of attapulgite clay nanorod crystal composite microsphere adsorbent
  • Preparation method of attapulgite clay nanorod crystal composite microsphere adsorbent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Prepare composite microsphere adsorbent according to the following specific steps:

[0022] a. Add 50g of attapulgite clay raw ore and 500mL of water to make slurry, pass the suspension obtained through 200-mesh gauze and let stand for 48h, pour out the upper suspension, activate the upper suspension in 400mL, 2mol / L hydrochloric acid solution for 24h, suction filter, Wash until neutral, dry to constant weight, and obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0023] b. Weigh 0.5g of hydrochloric acid-activated attapulgite clay nanorod crystals and add them to 50mL of ethanol. After ultrasonication for 1h, transfer to the reactor. Under mechanical stirring at 300r / min, heat up to 60°C, add 1.0mL of concentrated ammonia water and 5.0mL of distilled water in sequence , stirred for 0.5h, and then added 1.0g of ethyl orthosilicate to react for 12h. The product was suction filtered, washed with ethanol, and dried to obtain an attapu...

Embodiment 2

[0025] a. Add 50g of attapulgite clay raw ore and 500mL of water to make slurry, pass the suspension obtained by passing through 200 mesh gauze for 48h, pour out the upper suspension, activate the upper suspension in 400mL, 2mol / L hydrochloric acid solution for 24h, pump Filter, wash until neutral, dry to constant weight, and obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0026] b. Weigh 0.5g of hydrochloric acid-activated attapulgite clay nanorod crystals and add them to 50mL of ethanol. After ultrasonication for 1h, transfer to the reactor. mL of distilled water, stirred for 0.5h, and then added 1.5g of ethyl orthosilicate to react for 12h. The product was suction filtered, washed with ethanol, and dried to obtain an attapulgite clay nanorod crystal composite microsphere adsorbent. from TEM Figure 1-b It can be seen that the attapulgite clay nanorod crystal composite microsphere adsorbent is formed, the diameter of the microsphere is between 10-20...

Embodiment 3

[0028] a. Add 50g of attapulgite clay raw ore and 500mL of water to make slurry, pass the suspension obtained by passing through 200 mesh gauze for 48h, pour out the upper suspension, activate the upper suspension in 400mL, 2mol / L hydrochloric acid solution for 24h, pump Filter, wash until neutral, dry to constant weight, and obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0029] b. Weigh 0.5g of hydrochloric acid-activated attapulgite clay nanorod crystals and add them to 50mL of ethanol. After ultrasonication for 1h, transfer to the reactor. mL of distilled water, stirred for 0.5h, and then added 2.0g of ethyl orthosilicate to react for 12h. The product was suction filtered, washed with ethanol, and dried to obtain an attapulgite clay nanorod crystal composite microsphere adsorbent. from TEM Figure 1-c It can be seen that there is almost no unreacted attapulgite clay nanorod crystals in the obtained attapulgite clay nanorod crystal composite micros...

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Abstract

The invention relates to a preparation method for an attapulgite clay nanorod crystal composite microsphere adsorbent. According to the method, hydrochloric acid activated attapulgite clay nanorod crystals, concentrated ammonia liquor, ethyl orthosilicate, water and a solvent--absolute ethyl alcohol are reacted at a certain temperature, and through hydrolytic condensation and bonding of ethyl orthosilicate, a loose microsphere is formed by the attapulgite clay nanorod crystals. A loose microsphere composite material is formed by bonding each single attapulgite clay nanorod crystal with silica produced after hydrolytic condensation of ethyl orthosilicate, so the preparation method is simple; and the prepared microsphere composite material has good adsorption performance and has good application prospects in the field of sewage treatment.

Description

technical field [0001] The invention relates to a preparation method of an attapulgite clay nanorod crystal composite microsphere adsorbent capable of rapid sedimentation, in particular to a method for forming loose microspheres by bonding attapulgite clay nanorod crystals to silicon dioxide by hydrolysis and condensation of ethyl orthosilicate Sorbent preparation method. Background technique [0002] Attapulgite, also known as palygorskite, is a hydrous magnesium aluminum silicate mineral with a chain layer structure, and its ideal chemical formula is Si 8 o 20 Mg 5 (Al)(OH) 2 (H 2 O) 4 4H 2 O. Structural features make the attapulgite crystals in the form of fibers or needles, aggregated into straw bundles, and at the same time, the interior is filled with tunnel micropores consistent with the extension direction of the fibers, with a large specific surface area and internal surface area, showing a strong surface It has great application prospects in the field of wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30
Inventor 刘鹏朱龙祥杜鹏程
Owner LANZHOU UNIVERSITY
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