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Method for preparing organic hydrotalcite

A technology of organic hydrotalcite and hydrotalcite, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high price and single source of raw materials, achieve low price, increase organic carbon content, The effect of enhancing the effect

Inactive Publication Date: 2013-01-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the disadvantages of single source and expensive raw materials for preparing organic hydrotalcite in the prior art, and provide a method for preparing organic hydrotalcite, which uses anionic surfactants present in washing wastewater to modify Hydrotalcite, Synthetic Organic Hydrotalcite, Synthetic Organic Hydrotalcite as Adsorbent for Organic Wastewater Treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The washing waste water containing sodium dodecyl sulfonate is filtered to remove solid impurities to obtain washing waste water that does not contain solid impurities; the commercially available magnesium-aluminum hydrotalcite exceeding 100 meshes is added to the above washing waste water, and the solid state of the hydrotalcite and the washing waste water is obtained. The liquid mass ratio is 1:1000, stirring for 4 hours, precipitation separation, drying, and grinding to obtain organically modified hydrotalcite.

[0021] The COD of the washing wastewater after the preparation of organic hydrotalcite was removed by 90.5%, and the preparation process had a certain effect of wastewater treatment.

[0022] In a 200-mL conical flask, 50 mL of wastewater containing phenanthrene with a concentration of 1 mg / L was added, and 20 mg of organic hydrotalcite was added. Put it into a constant temperature oscillator, shake at 25°C and 200rpm for 2 hours, take it out, centrifuge it,...

Embodiment 2

[0026] The washing wastewater containing sodium dodecyl benzene sulfonate is filtered to remove solid impurities to obtain washing wastewater that does not contain solid impurities; the commercially available copper-aluminum hydrotalcite that crosses 50 meshes is added to the above-mentioned washing wastewater, and the solid-liquid mass ratio is 1 : 500, stirring for 5h, precipitation separation, drying, and grinding to obtain organically modified hydrotalcite.

[0027] The COD of the washing wastewater after the preparation of organic hydrotalcite was removed by 93.1%, and the preparation process had a certain effect of wastewater treatment.

[0028] In a 200-mL conical flask, 50 mL of wastewater containing p-nitrobenzene with a concentration of 5 mg / L was added, and 25 mg of organic hydrotalcite was added. Put it into a constant temperature shaker, shake it for 2 hours at 25°C and 200rpm, take it out, centrifuge it, and measure the concentration with an ultraviolet-visible s...

Embodiment 3

[0032]Firstly, magnesium-aluminum hydrotalcite was synthesized according to the literature (hydrothermal synthesis of magnesium-aluminum hydrotalcite, Applied Chemistry, 2001, 18, 70-72); The washing wastewater of sodium and two mixed surfactants was filtered to remove solid impurities, and the washing wastewater without solid impurities was obtained; the hydrotalcite prepared by passing through 50 mesh was added to the above washing wastewater, and the solid-liquid mass ratio was 1:1000, and stirred for 5 hours , separated by precipitation, dried and milled to obtain organically modified hydrotalcite.

[0033] The COD of the washing wastewater after the preparation of the organic hydrotalcite was removed by 91.7%, and the preparation process has a certain effect on wastewater treatment.

[0034] Add 50 mL of waste water containing 5 mg / L of p-nitrophenol into a 200 mL Erlenmeyer flask, and add 25 mg of organic hydrotalcite. Put it into a constant temperature oscillator, shak...

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Abstract

A method for preparing organic hydrotalcite includes the steps of firstly, filtering washing wastewater to remove solid impurities so as to obtain washing wastewater without solid impurities; and secondly, adding hydrotalcite into the washing wastewater, mixing, performing precipitation separation, drying, and grinding to obtain anionic surfactant modified hydrotalcite. Due to the fact that surfactant used during washing is most anionic surfactant, the anionic surfactant in the washing wastewater is used as modifier to synthesize the organic hydrotalcite, the organic hydrotalcite is prepared while the anionic surfactant in the washing wastewater can be absorbed effectively, and waste recycling is achieved. The prepared organic hydrotalcite is low in price, wastewater treating effect is evident, wastes are treated with wastes, and high economical and practical values are achieved.

Description

technical field [0001] The invention relates to environmental pollution control and new material development, in particular to a method for preparing an organic hydrotalcite adsorbent by utilizing washing wastewater. Background technique [0002] The most important surfactants used in detergents are anionic. Among them, the amount of linear alkyl benzene sulfonate is the largest, followed by fatty alcohol sulfate, fatty alcohol polyoxyethylene ether sulfate, and alkyl sulfonate. Anionic surfactants represented by sodium dodecylbenzene sulfonate are sensitive to water hardness, not easy to be oxidized, have strong foaming power, low cost, mature synthesis process, and have significant effects on particle dirt, protein dirt and oily dirt. The decontamination effect is excellent, especially for the washing of particulate dirt on natural fibers. The detergency power increases with the increase of the washing temperature. The effect on protein dirt is higher than that of non-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 马建锋张天立姚超李定龙
Owner CHANGZHOU UNIV
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