Process for preparing porous clay isomeric material

A clay, heterogeneous technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to reduce costs, avoid secondary pollution, and have a wide range of sources.

Active Publication Date: 2004-12-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of cost-effective regeneration and disposal methods is still one of the main problems restricting the practical application of organobentonite in wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, the organic bentonite (being called for short CTMAB bentonite) prepared by the ratio of 0.1mol cetyltrimethylammonium bromide / 100g bentonite is at first used for adsorption treatment to contain the waste water of 1000mg / L p-nitrophenol (PNP), The saturated adsorption capacity of CTMAB bentonite is 96mgPNP / g, solid-liquid separation, CTMAB bentonite (PNP-CTMAB bentonite) after absorbing p-nitrophenol is dried in the air, and then dried at 80°C for 24h in an air atmosphere. Mix 14g of DNP-CTMAB bentonite with 13g of dodecylamine, stir and react at 50°C for 30min, slowly add 120ml of ethyl orthosilicate dropwise, and stir at room temperature for 4h after the dropwise addition. Separation of solid and liquid, drying of the solid part, and finally heating up to 560°C at a rate of 3°C / min in an air atmosphere, and roasting for 6h to remove surfactants and adsorbed organic pollutants to obtain porous clay heterogeneous materials.

[0025] The main property index ...

Embodiment 2

[0026] Embodiment 2, the organobentonite (being called for short CPC bentonite) prepared by the ratio of 0.1mol cetylpyridinium chloride / 100g bentonite is at first used for adsorption treatment to contain the waste water of 1000mg / L p-nitrophenol (PNP), the CPC bentonite The saturated adsorption capacity is 94mgPNP / g, solid-liquid separation, and the CPC bentonite (PNP-CPC bentonite) after absorbing p-nitrophenol is dried in the air, and then dried at 80°C for 24 hours in an air atmosphere. Mix 14g of DNP-CPC bentonite with 13g of dodecylamine, stir and react at 50°C for 30min, slowly add 120ml of ethyl orthosilicate dropwise, and stir at room temperature for 4h after the dropwise addition. Separation of solid and liquid, drying of the solid part, and finally heating up to 560°C at a rate of 3°C / min in an air atmosphere, and roasting for 6h to remove surfactants and adsorbed organic pollutants to obtain porous clay heterogeneous materials.

[0027] The main property index of t...

Embodiment 3

[0028] Embodiment 3, the organobentonite (being called for short CTMAB bentonite) prepared by the ratio of 0.1mol cetyltrimethylammonium bromide / 100g bentonite is at first used for adsorption treatment to contain the waste water of 1000mg / L p-nitrophenol (PNP), The saturated adsorption capacity of CTMAB bentonite is 96mgPNP / g, solid-liquid separation, CTMAB bentonite (PNP-CTMAB bentonite) after absorbing p-nitrophenol is dried in the air, and then dried at 80°C for 24h in an air atmosphere. Mix 14g of DNP-CTMAB bentonite with 28g of dodecylamine, stir and react at 50°C for 30min, slowly add 120ml of ethyl orthosilicate dropwise, and stir at room temperature for 4h after the dropwise addition. Separation of solid and liquid, drying of the solid part, and finally heating up to 560°C at a rate of 3°C / min in an air atmosphere, and roasting for 6h to remove surfactants and adsorbed organic pollutants to obtain porous clay heterogeneous materials.

[0029] The main property index of...

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Abstract

The preparation process of porous isomeric clay material includes the steps of: mixing and reacting the dewatered waste organic bentonite and mixed surfactant; adding neutral inorganic precursor to react via stirring; solid-liquid separation to obtain solid, and roasting the solid part to eliminate surfactant and adsorbed organic pollutant. Like similar material, the porous isomeric clay material of the present invention has great specific surface area, homogeneously distributed pores, moderate pore size, high void order degree, and low synthesizing cost.

Description

technical field [0001] The invention belongs to the technical field of inorganic porous materials, and in particular relates to a method for preparing porous clay heterogeneous materials, in particular to a method for preparing porous clay materials by using organobentonite treated with organic wastewater as the main clay raw material and providing cationic surfactants. Background technique [0002] Mesoporous materials represented by MCM-41, MCM48, FSM-16 and HMS are one of the research hotspots in the fields of chemistry, physics, materials and environmental protection in the world in recent years. In 1995, Galameau et al. (Nature, 1995, 374(6): 529~531) reported for the first time a class of mesoporous materials with good thermal stability and pore sizes ranging from ultra-large micropores to mesopores (1.4-2.2nm), namely porous clay heterogeneous materials (PCHs) . Like other mesoporous materials, this kind of material has the advantages of lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 朱利中田森林
Owner ZHEJIANG UNIV
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