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Preparation method and usage of modified attapulgite adsorption material

A technology of attapulgite and adsorption materials, which is applied in the field of preparation of modified attapulgite adsorption materials, achieving the effects of less process steps, improved adsorption performance, and simple operation

Active Publication Date: 2011-11-23
江苏麦阁吸附剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the aminosilane coupling agent contains less amino groups, this method has limited improvement on the adsorption performance of attapulgite.

Method used

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  • Preparation method and usage of modified attapulgite adsorption material
  • Preparation method and usage of modified attapulgite adsorption material
  • Preparation method and usage of modified attapulgite adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The raw attapulgite is crushed, ball milled, and sieved to obtain powdered attapulgite. Take the powdered attapulgite and add it to a 3% sodium hexametaphosphate aqueous solution. The mass ratio of attapulgite to water is 1 : 20, after stirring for 12 hours, let it stand naturally, take the upper suspension and filter, dry, and grind to obtain purified attapulgite;

[0027] Add the purified attapulgite to the hydrochloric acid solution with a concentration of 1mol / / L. The mass-volume ratio of the attapulgite to the hydrochloric acid solution is 1:10 in g / ml. Stir at room temperature for 0.5h, centrifuge, and use deionized water for precipitation. After washing it with 0.1mol / L silver nitrate solution to detect the absence of chloride ions, it is dried to obtain acid-activated attapulgite;

[0028] 10g of purified and acid-activated attapulgite was dispersed in 100mL of toluene, and ultrasonically dispersed for 30min. Under stirring, 10g of γ-aminopropyltriethoxysilane was ad...

Embodiment 2

[0032] The raw attapulgite is crushed, ball milled, and sieved to obtain powdered attapulgite. Take the powdered attapulgite and add it to a 5% sodium hexametaphosphate aqueous solution. The mass ratio of attapulgite to water is 1 :30, after stirring for 36h, let it stand naturally, take the upper suspension, filter, dry, and grind to obtain purified attapulgite;

[0033] Add the purified attapulgite to the hydrochloric acid solution with a concentration of 6mol / / L, the mass-volume ratio of the attapulgite to the hydrochloric acid solution in g / ml is 1:15, stir for 2h at room temperature, centrifuge, and wash the precipitate with deionized water The acid-activated attapulgite is obtained by drying after detecting the absence of chloride ions with 0.1 mol / L silver nitrate solution;

[0034] Disperse 10g attapulgite in 300mL xylene and disperse ultrasonically for 10min. Under stirring, add 30g γ-aminopropylmethyldimethoxysilane dropwise. After the dropwise addition, heat to 100°C. Af...

Embodiment 3

[0038] The raw attapulgite is crushed, ball milled, and sieved to obtain powdered attapulgite. Take the powdered raw attapulgite and add it to a 4% sodium hexametaphosphate aqueous solution. The mass ratio of attapulgite to water is 1 :23, after stirring for 24 hours, let it stand naturally, take the upper suspension and filter, dry and grind to obtain purified attapulgite;

[0039] The purified attapulgite was added to the hydrochloric acid solution with a concentration of 2mol / / L, the mass-volume ratio of the attapulgite to the hydrochloric acid solution was 1:11 in g / ml, stirred at room temperature for 1 hour, centrifuged, and the precipitate was washed with deionized water The acid-activated attapulgite is obtained by drying after detecting the absence of chloride ions with 0.1 mol / L silver nitrate solution;

[0040] Disperse 10g attapulgite in 200mL toluene, ultrasonically disperse for 20min, add 20g γ-aminopropyltrimethoxysilane dropwise under stirring conditions, after the d...

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Abstract

The invention discloses a preparation method and usage of a modified attapulgite adsorption material. The method comprises the following steps: modifying attapulgite which has undergone purification and acid activation with an amino-silane coupling agent so as to introduce amino onto the surface of attapulgite; subjecting amino and excess acrylic acid ester to a Michael addition reaction so as tointroduce ester groups, subjecting introduced ester groups and polyethylene polyamine to a Michael addition reaction, carrying out underpressure distillation to remove a solvent and excess reactants,and carrying out vacuum drying, grinding and sieving to obtain a finished product. According to the invention, polyethylene polyamine or alcamine compounds are bonded to the surface of attapulgite through covalent bonds, thereby substantially improving adsorption performance of attapulgite to metal ions.

Description

Technical field [0001] The invention belongs to the technical field of new materials, and relates to a preparation method and application of a modified attapulgite adsorption material. Background technique [0002] Attapulgite, also known as palygorskite, is a kind of water-containing magnesium-rich aluminum silicate clay mineral with a special chain-layered structure, and its theoretical chemical formula is Si 8 Mg 5 O 20 (OH) 2 (H 2 O) 4 ·4H 2 O, its natural nanochannels and nanocrystals give it a developed internal and external specific surface area, and it is often used as a natural cheap adsorbent for oil decolorization and pet excrement adsorption. [0003] In order to broaden the application field of attapulgite, some people use it for the adsorption of industrial wastewater. However, due to the mineralogical limitations of attapulgite itself, its direct use in industrial wastewater treatment has the problem of poor adsorption performance. For this reason, many researchers h...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62C22B7/00C22B11/00
CPCY02P10/20
Inventor 彭勇刚纪俊玲汪媛陶宇万怀新朱海勇
Owner 江苏麦阁吸附剂有限公司
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