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Preparation method for 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 the waste of attapulgite resources, limit large-scale application, and difficult separation, etc. question

Active Publication Date: 2014-10-01
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 for attapulgite clay nanorod crystal composite microsphere adsorbent
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  • Preparation method for attapulgite clay nanorod crystal composite microsphere adsorbent

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Embodiment 1

[0023] Embodiment 1: Prepare composite microsphere adsorbent according to the following specific steps:

[0024] a. Add 50 g of attapulgite clay raw ore and 500 mL of water to make slurry, pass the suspension obtained through 200 mesh gauze and let it stand for 48 h, pour out the upper suspension, and activate the upper suspension in 400 mL, 2 mol / L hydrochloric acid solution for 24 h, filter with suction, wash until neutral, dry to constant weight, and obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0025] b. Weighed 0.5 g hydrochloric acid-activated attapulgite clay nanorod crystals and added them to 50 mL ethanol, ultrasonicated for 1 h, and then transferred to the reactor. Under mechanical stirring at 300 r / min, the temperature was raised to 60 °C, and 1.0 mL concentrated ammonia water, 5.0 mL of distilled water was stirred for 0.5 h, and then 1.0 g of ethyl orthosilicate was added to react for 12 h. The product was suction filtered, washed wi...

Embodiment 2

[0027] a. Add 50 g of attapulgite clay raw ore and 500 mL of water to make slurry, pass the suspension obtained through 200-mesh gauze for 48 h, pour out the upper suspension, and activate the upper layer in 400 mL, 2 mol / L hydrochloric acid solution The suspension was suction filtered for 24 hours, washed until neutral, and dried to constant weight to obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0028] b. Weigh 0.5 g hydrochloric acid-activated attapulgite clay nanorod crystals and add them into 50 mL ethanol, sonicate for 1 h, then transfer to the reactor, heat up to 60 °C under mechanical stirring at 300 r / min, and add 1.0 mL concentrated Ammonia water and 5.0 mL of distilled water were stirred for 0.5 h, and then 1.5 g of ethyl orthosilicate was added to react for 12 h. 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 se...

Embodiment 3

[0030] a. Add 50 g of attapulgite clay raw ore and 500 mL of water to make slurry, pass the suspension obtained through 200-mesh gauze for 48 h, pour out the upper suspension, and activate the upper layer in 400 mL, 2 mol / L hydrochloric acid solution The suspension was suction filtered for 24 hours, washed until neutral, and dried to constant weight to obtain hydrochloric acid-activated attapulgite clay nanorod crystals.

[0031] b. Weigh 0.5 g hydrochloric acid-activated attapulgite clay nanorod crystals and add them into 50 mL ethanol, sonicate for 1 h, then transfer to the reactor, heat up to 60 °C under mechanical stirring at 300 r / min, and add 1.0 mL concentrated Ammonia water and 5.0 mL of distilled water were stirred for 0.5 h, and then 2.0 g of ethyl orthosilicate was added to react for 12 h. 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 se...

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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. [0002] Background technique [0003] 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 f...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30
Inventor 刘鹏朱龙祥杜鹏程
Owner LANZHOU UNIVERSITY
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