Supermolecule microfiltration agent and preparation method thereof

A supramolecular and microfiltration technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of low efficiency, high cost, secondary pollution, etc., to reduce costs, improve Efficiency, the effect of avoiding secondary pollution

Inactive Publication Date: 2008-09-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a supramolecular enhanced microfiltration reagent to overcome the disadvantages of high cost, low efficiency and secondary pollution in the existing enhanced microfiltration technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] At 20°C, slowly drop ammonia solution into the formaldehyde solution, the volume of which is twice the amount of formaldehyde. Then add CS dropwise 2 and catalyst 40% Na 2 CO 3 The aqueous solution was stirred for 6 hours, and then crystallized with ethanol to obtain 1,3,5-hexahydrotriazine dithiocarbamate sodium as a white solid with a yield of 80%.

Embodiment 2

[0014] Add supramolecular enhanced microfiltration reagent SHC to the complexed heavy metal wastewater, react under stirring, pump the suspension obtained after the reaction into the membrane separator, adjust the pressure and flow rate, and perform supramolecular microfiltration.

Embodiment 3

[0016] Cu 2+ The supramolecular enhanced microfiltration reagent SHC is added to the CuEDTA solution with a concentration of 3.0 mg / L. SHC reacts with copper ions to form supramolecular colloidal particles. The chemical reaction between SHC and CuEDTA to form supramolecular particles is shown in the following formula:

[0017] 2nNa 3 SHC+3nCuSO 4 =[Cu 3 (SHC) 2 ]n↓+3nNa 2 SO 4 (II)

[0018] After stirring for 1 min, supramolecular microfiltration was performed under conditions of pH 7.8 and a pressure of 40 kPa. When operating for 30min, 60min, 90min, 120min, and 150min, the measured removal rates of copper ions were 99.2%, 99.5%, 99.4%, 99.6% and 99.3%, respectively, and the remaining concentrations of all copper ions were lower than 0.1mg / L.

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Abstract

The present invention discloses a supramolecular microfiltration agent and a preparation method thereof. The chemical name of the supramolecular microfiltration agent is 1, 3, 5-hexahydrogen triazine sodium dithiocarbamate. The compound can react with complex heavy metal ions in waste water to generate supramolecular particles that can be easily eliminated through microfiltration. The chemical principles of supramolecular coordination are first applied to strengthen the microfiltration technology. And the present invention with low cost, high efficiency and little pollution can be used for treating the waste water with low-concentration heavy metal, in particular for deep treating the waste water with low-concentration complex heavy metal.

Description

technical field [0001] The invention relates to an enhanced microfiltration reagent and its preparation technology. Background technique [0002] At present, the advanced treatment of low-concentration heavy metal wastewater mostly adopts adsorption method and membrane filtration method. Adsorption methods include ion exchange resins, special resins and activated carbon adsorption methods, etc., but their indicators are unstable, and the regeneration of resins and activated carbons will produce acid-base waste liquid, causing environmental pollution, and remove heavy and strong complexing agents. The effect of metal wastewater is not ideal. Although special resins have certain effects in treating wastewater, special resins are expensive and difficult to promote. [0003] As a high-tech, membrane filtration has been widely researched and explored in the field of industrial wastewater advanced treatment, and has become one of the indispensable technologies for industrial wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/48C02F1/62C02F101/20
Inventor 熊亚付丰连蒋树贤
Owner SUN YAT SEN UNIV
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