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Preparation method of beta-cyclodextrin/mesoporous attapulgite composite adsorbent

An attapulgite, composite adsorption technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of lack of adsorption force, limited adsorption capacity, etc.

Inactive Publication Date: 2014-02-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The original attapulgite lacks adsorption capacity for many chemical substances, so when it is used to directly adsorb chlorophenol, its adsorption capacity is very limited

Method used

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  • Preparation method of beta-cyclodextrin/mesoporous attapulgite composite adsorbent
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  • Preparation method of beta-cyclodextrin/mesoporous attapulgite composite adsorbent

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Embodiment 1

[0033] 1. A preparation method of β-cyclodextrin / mesoporous attapulgite composite adsorbent, carried out according to the following steps:

[0034] (1) Synthesis of mesoporous attapulgite

[0035] After the attapulgite material is ground, react 0.95g of ATP with 8mol / L HCl solution at 90°C for 2.0h, then cool to room temperature, filter the product, and wash it thoroughly with distilled water until it is neutral, then place it at 80°C Dried and ground into powder for later use. Dissolve 0.25g of CTAB in 10mL of deionized water, then add 0.25g of acidified ATP to form a complex, then add 0.5mol / L NaOH dropwise to adjust the pH of the complex to 12.0, and then put the complex in oil at 60°C After reacting in the bath for 2.0 h, the mixture was transferred to a reaction kettle, reacted at 100 ° C for 24 h, then cooled to room temperature, filtered, washed with distilled water and absolute ethanol until the pH was 7, dried at 80 ° C for 12 h, and then Put the obtained compound i...

Embodiment 2

[0050] 1. A preparation method of β-cyclodextrin / mesoporous attapulgite composite adsorbent, carried out according to the following steps:

[0051] (1) Synthesis of mesoporous attapulgite

[0052] After the attapulgite material is ground, react 0.98g of ATP with 7.9mol / L HCl solution at 80°C for 1.9h, then cool to room temperature, filter the product, and wash it thoroughly with distilled water until it is neutral, and then heat it at 90°C Dried and ground into powder for later use. Dissolve 0.2g of CTAB in 10mL of deionized water, then add 0.2g of acidified ATP to form a complex, then add 0.5mol / L NaOH dropwise to adjust the pH of the complex to 12.0, and then put the complex in oil at 65°C After reacting in the bath for 1.9h, the mixture was transferred to the reaction kettle, reacted at 105°C for 23h, then cooled to room temperature, filtered, washed with distilled water and absolute ethanol until neutral, then dried at 80°C for 12h, and then The obtained composite was pu...

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Abstract

The invention relates to a preparation method of a beta-cyclodextrin / mesoporous attapulgite composite adsorbent and belongs to the technical field of environment function material preparation. According to the preparation method, attapulgite is used as a silicon-based raw material and cetyl trimethyl ammonium bromide is used as a template to prepare mesoporous attapulgite (mATP), and mesoporous attapulgite is modified by the use of beta-cyclodextrin (beta-CD) so as to synthesize the beta-CD / mATP composite material. The composite material can be applied in adsorption and separation of 2,4,6-trichlorophenol and 2,4,5-trichlorophenol in an aqueous solution. The product has an open pore structure which has advantages of narrow pore diameter distribution, high specific surface area and pore volume and the like. The product is widely used in fields of environment, chemical industry and the like.

Description

technical field [0001] The invention relates to a method for preparing a β-cyclodextrin / mesoporous attapulgite composite adsorbent by surface modification, and belongs to the technical field of environmental functional material preparation. Background technique [0002] Mesoporous materials have the advantages of open pore structure, narrow pore size distribution, high specific surface area and large pore volume, and are widely used in the fields of environment and chemical industry. At present, tetraalkoxysilane is usually used as the silicon source for preparing mesoporous materials, such as methyl orthosilicate (TMSO), orthoethyl silicate (TEOS), etc., if it is used for large-scale production of mesoporous silicon, It will cause serious environmental pollution problems. Therefore, in order to solve this problem, scientific researchers began to look for natural silicon-based minerals to replace toxic organic silicon as a silicon source to prepare mesoporous materials. Hua...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 欧红香张云雷潘建明卞维柏甘梦颖
Owner JIANGSU UNIV
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