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Magnetic clay material and preparation method thereof

A magnetic material and clay technology, applied in the design, preparation and application of magnetic clay materials, can solve the problems of nanoparticle agglomeration, difficult separation and recovery of catalysts, etc.

Inactive Publication Date: 2011-05-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material is based on the preparation of inorganic-organic composite pillared clay, through the interfacial chemical regulation of surfactants and chemical reactions to generate nano-magnetic particles in situ on the clay surface, which not only solves the problems of nano-particle agglomeration, but also solves the problem of The catalyst is difficult to separate and recover in the catalytic reaction of the suspension system

Method used

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  • Magnetic clay material and preparation method thereof
  • Magnetic clay material and preparation method thereof
  • Magnetic clay material and preparation method thereof

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Embodiment

[0026] (1) Na-montmorillonite (Na + -Mt) before use, wash the soluble salts with 50% ethanol solution, magnetically stir for 5 minutes, discard the supernatant after centrifugation, repeat washing and centrifugation for 3 times, dry at 45° C., grind into powder, and 200 meshes.

[0027] (2) Disperse 1.0 g of montmorillonite in 100 ml of deionized water, hydrate for 6 hours, and overnight to make it fully swell.

[0028] (3) Under stirring, add 0.4M iron proppant (10.8g FeCl 3 ·6H 2 O dissolved in 100ml deionized water) was added dropwise into the montmorillonite suspension, and magnetically stirred for 4 hours to obtain ferropillared montmorillonite (Fe-Mt).

[0029] (4) Organic proppant (1.712g D 2000 Dissolve in 100ml of deionized water, then add twice the amount of hydrochloric acid, so that the amino groups at both ends of the polymer form ammonium cations) dropwise added to the iron pillared montmorillonite, stirred in a water bath for 9 hours, to obtain a composite p...

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Abstract

The invention relates to a magnetic clay material and a preparation method thereof. The magnetic clay material is a superparamagnetc material formed by loading nano-iron oxide particles (gamma-Fe2O3) on the clay surface. In the preparation process, the surfactant is used as a template agent, the immobilization process of hydrated hydraferro on the surface of montmorillonite clay is regulated, and fumigating with acetic acid and thermal treatment are performed to obtain the superparamagnetc clay material. The micelle formed by the surfactant is synergic with the immobilization of the hydrated hydraferro on the clay surface, the load capacity is increased, and thus the magnetic saturation strength of the magnetic clay is enhanced. The magnetic clay material provided by the invention not only has the characteristics of large adsorption capacity and strong adsorption ability, but also can realize the aim of enhanced separation in the using process of material by using external magnetic field, and solve the problem of secondary pollution as the clay material is difficult to separate and recycle.

Description

technical field [0001] The invention relates to the design, preparation and application of a magnetic clay material, including adsorption, catalysis and magnetic materials and their application in the fields of chemical separation and purification and environmental pollutant control. The magnetic material is a functional material integrating adsorption-catalysis-magnetic separation. technical background [0002] Natural montmorillonite is a layered silicate mineral, which has the characteristics of adsorption swelling, intercalation and ion exchange, and is a good chemical reaction site. However, due to its small specific surface area and hydrophilic substance, it can Its adsorption property will disappear and cannot be recycled, so it is directly used for industrial wastewater treatment, and the effect is often not good. [0003] Inorganic or organic modification can not only increase the specific surface area of ​​montmorillonite, but also regulate the hydrophilic-hydroph...

Claims

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Application Information

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IPC IPC(8): H01F1/00B01J20/12B01J20/30
Inventor 余江杨秋昕
Owner BEIJING UNIV OF CHEM TECH
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