Organic hydrotalcite and preparation method thereof

A technology of organic hydrotalcite and hydrotalcite, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of small adsorption amount of organic pollutants, achieve the effect of promoting adsorption amount and increasing the total amount of organic carbon

Inactive Publication Date: 2013-01-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is: the organic hydrotalcite in the prior art has a small amount of organic pollutant adsorption,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The commercially available magnesium-aluminum hydrotalcite is passed through a 40-mesh sieve, and added to the anionic surfactant sodium dodecylbenzenesulfonate solution with a concentration of 0.2mmol / L, and 0.2g hydrotalcite is added to every milliliter of anionic surfactant solution, Stir in a water bath at 50°C for 2 hours; then add nonionic surfactant Triton X-100, add 0.3 mmol of nonionic surfactant per gram of hydrotalcite, and stir in a water bath at 50°C for 2 hours, filter the product, wash with distilled water, After filtering and drying, dry at 60°C, and then activate at 105°C for 30 minutes; grind and pass through a 50-mesh sieve to obtain an anion-nonionic surfactant-modified organic hydrotalcite.

[0025] Add the prepared anion-nonionic surfactant modified hydrotalcite into 15mg / L nitrobenzene, stir for 2h, let it stand for 3h, precipitate and separate, measure the concentration of the supernatant with a UV-visible spectrophotometer, and the removal rate i...

Embodiment 2

[0030] The commercially available magnesium-aluminum type hydrotalcite is crossed 200 mesh sieves, joins concentration and is in the anionic surfactant sodium cetyl sulfonate solution of 0.5mmol / L, every milliliter of anionic surfactant solution adds 0.6g hydrotalcite, in Stir in a water bath at 80°C for 8 hours; add nonionic surfactant polyoxyethylene sorbitan monolaurate (Tween20), add 0.1 mmol of nonionic surfactant per gram of hydrotalcite, and stir in a water bath at 80°C for 4 hours , the product is filtered, washed with distilled water, dried at 90°C, and then activated at 110°C for 5 hours; ground and passed through a 100-mesh sieve to obtain an anion-nonionic surfactant-modified organic water talc.

[0031] The obtained anion-nonionic surfactant modified hydrotalcite was added to 15 mg / L toluene, stirred for 2 hours, allowed to stand for 3 hours, precipitated and separated, and the concentration of the supernatant was measured by a UV-visible spectrophotometer, and th...

Embodiment 3

[0036]Firstly, magnesium-aluminum hydrotalcite was synthesized according to the literature (hydrothermal synthesis of magnesium-aluminum hydrotalcite, Applied Chemistry, 2001, 18, 70-72); the hydrotalcite was passed through a 200-mesh sieve, and added to the concentration of 0.4mmol / L In the anionic surfactant sodium dodecylsulfonate solution, add 0.3 g of hydrotalcite per milliliter of anionic surfactant solution, and stir in a water bath at 60°C for 8 hours; then add the nonionic surfactant stearyl polyoxyethylene ether ( Brij78), add 0.2mmol non-ionic surfactant per gram of hydrotalcite, then stir in 80°C water bath for 4h, the product is filtered, washed with distilled water, dried at 90°C, and then activated at 110°C 5 hours; grinding and passing through a 50-mesh sieve to obtain an anion-nonionic surfactant-modified organic hydrotalcite.

[0037] Add the obtained anion-nonionic surfactant modified hydrotalcite into 15mg / L p-nitrophenol, stir for 2h, let stand for 3h, pre...

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Abstract

The invention relates to development of a new material for controlling environmental pollution, and discloses organic modified hydrotalcite and a preparation method thereof. Although some existing methods are used for modifying the hydrotalcite to obtain the organic hydrotalcite, organic hydrotalcite of the prior art is comparatively low in capacity of adsorbing organic pollutants. According to the preparation method, an anionic surfactant and a nonionic surfactant are adopted to modify the hydrotalcite; the combining capacity of the nonionic surfactant is increased by the anionic surfactant; and meanwhile, the total quantity of organic carbons on the surface of the hydrotalcite is increased by the anionic surfactant, therefore the adsorption capacity of the organic pollutants on the surfaces of particles is greatly increased.

Description

Technical field: [0001] The invention relates to the development of new materials for environmental pollution control, in particular to an organically modified hydrotalcite and a preparation method thereof. Background technique: [0002] Layered Double Hydroxides (LDH for short), also known as hydrotalcite, is an important class of inorganic functional materials. Its unique layered structure and the tunable variability of layer elements and interlayer anions have attracted widespread attention. The introduction of new guest anions into the layer through ion exchange can cause corresponding changes in the layered structure and composition, so it can be prepared A large class of functional materials with special properties. Hydrotalcite materials belong to anionic layered compounds. Layered compounds refer to a class of compounds with a layered structure and interlayer ions that are exchangeable. Utilizing the intercalation and exchangeability of layered compounds under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
Inventor 马建锋杨彦姚超李定龙
Owner CHANGZHOU UNIV
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