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Attapulgite clay based adsorbing material and preparation method thereof

An adsorption material and attapulgite technology, which is applied in the field of attapulgite-based adsorption materials and its preparation, can solve problems such as separation and recovery difficulties, and achieve the effects of easy separation and recovery, excellent magnetic properties, and good dispersibility

Active Publication Date: 2013-01-30
南通豫湖机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiency of the difficulty in separation and recovery of polyamide-amine (PAMAM) dendritic macromolecule grafted attapulgite adsorption materials in the prior art, and to provide a preparation method for attapulgite-based adsorption materials, The method is simple in process, and the obtained material has good adsorption performance and is convenient to recycle.

Method used

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  • Attapulgite clay based adsorbing material and preparation method thereof
  • Attapulgite clay based adsorbing material and preparation method thereof
  • Attapulgite clay based adsorbing material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] (1) Add 2g NaOH into 25mL triethanolamine (TEG) solution, pass N 2 protection, heated to 100°C for 1h under magnetic stirring, and then cooled to 70°C to obtain brown-red NaOH / TEG solution;

[0032] (2) Disperse 1 g of attapulgite into 20 mL of TEG, ultrasonically disperse for 30 min, then add 4 mmol of polyacrylic acid (PAA, Mw=1800) and 2 mmol of FeCl 3 , through N 2 Protected, heated to 100°C under stirring, kept warm for 1h, continued to heat up to 210°C, then quickly injected 5mL NaOH / TEG solution, and kept the temperature for 30min to continue the reaction and then lowered to room temperature, the product was washed several times with ethanol and deionized water , and finally dispersed in 20 mL of deionized water to obtain surface carboxylated Fe 3 o 4 / attapulgite composite dispersion;

[0033] (3) 0.72g chitosan (molecular weight is 1.1×10 5 , the degree of deacetylation is 90%) was dissolved in 20mL mass concentration of 2% acetic acid aqueous solution, an...

Embodiment 2

[0039] (1) Add 5g NaOH to 25mL diethylene glycol (DEG) solution, pass N 2 protection, heated to 120°C for 0.5h under magnetic stirring, and then cooled to 60°C to obtain a brown-red NaOH / DEG solution;

[0040] (2) Disperse 1g of attapulgite into 30mL of DEG, ultrasonically disperse for 30min, then add 10mmol of polyacrylic acid (PAA, Mw=1800) and 8mmol of FeCl 3 , through N 2 Protected, heated to 120°C under stirring, kept warm for 0.5h, continued to heat up to 220°C, then quickly injected 3mL NaOH / DEG solution, and kept the temperature for 60min to continue the reaction and then lowered to room temperature, the product was washed with ethanol and deionized water for several times, and finally dispersed in 20mL deionized water to obtain surface carboxylated Fe 3 o 4 / attapulgite composite dispersion;

[0041] (3) 4.5g chitosan (molecular weight is 2.0×10 5 , the degree of deacetylation is 75%) was dissolved in 25 mL of 5% acetic acid aqueous solution, and then the chitosa...

Embodiment 3

[0047] (1) Add 3g NaOH to 25mL triethanolamine (TEG) solution, pass N 2 protection, heated to 110°C for 1h under magnetic stirring, and then cooled to 60°C to obtain a brown-red NaOH / TEG solution;

[0048] (2) Disperse 1g of attapulgite into 20mL of TEG, ultrasonically disperse for 30min, then add 4mmol of polyacrylic acid (PAA, Mw=2000) and 4mmol of FeCl 3 , through N 2 protection, heated to 110°C under stirring, kept warm for 0.5h, then continued to heat up to 230°C, then quickly injected 2mL NaOH / TEG solution, and kept the temperature for 2h to continue the reaction and then lowered to room temperature, the product was washed with ethanol and deionized water for several times, and finally dispersed in 20mL deionized water to obtain surface carboxylated Fe 3 o 4 / attapulgite composite dispersion;

[0049] (3) 1.0g chitosan (molecular weight is 2.0×10 5 , the degree of deacetylation is 90%) was dissolved in 30mL mass concentration of 3% acetic acid aqueous solution, and ...

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Abstract

The invention provides a preparation method for an attapulgite clay based adsorbing material. The preparation method comprises the following steps: firstly, using a polyol method to prepare surface-chloracetylated Fe3O4 / attapulgite composite; then, using a complex coacervation method to prepare chitosan / Fe3O4 / attapulgite composite; and finally, using the reaction of carbomethoxy on hemi-replaced polyamide-amine (PAMAM) dendritic polymer, chitosan and amino-group on ethanediamine to chemically graft PAMAM to the surface of the chitosan / Fe3O4 / attapulgite composite. The attapulgite clay based adsorbing material has beneficial effects that Fe3O4 nanometer crystal prepared from the polyol method has excellent magnetism, so that the material is easily separated and recycled; the excellent adsorbing performances of the attapulgite, the chitosan and the PAMAM are organically combined, so that the adsorbing capacity of the original attapulgite clay is remarkably improved; moreover, the used reagent is nontoxic and harmless, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to an attapulgite-based adsorption material and a preparation method thereof. Background technique [0002] Attapulgite (referred to as attapulgite) is a kind of hydrous magnesium-aluminosilicate clay mineral with a special chain layer structure. It is a rare non-metallic mineral resource and has abundant reserves in my country. Only the existing attapulgite in Xuyi area Clay reserves are over 67 million tons. Attapulgite's unique fibrous crystal structure and natural nano-channels make it have a developed internal and external specific surface area, and has unusual colloidal and adsorption properties. It is often used as an adsorbent for decolorization of grease and adsorption of pet excrement. In order to improve the adsorption performance of attapulgite, heat treatment, acid treatment, alkali treatment and organic ammonium salt treatment are often used. These treatment method...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 彭勇刚纪俊玲汪媛张云龙
Owner 南通豫湖机械有限公司
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