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Method for preparing novel remover for heavy metal ion and application thereof

A heavy metal ion and remover technology, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems that affect large-scale promotion and application, inconvenient dosing control, and expensive heavy metal chelating agents.

Inactive Publication Date: 2008-12-03
陈德琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their common deficiency is that they have limited ability to chelate heavy metal ions in wastewater, and are insoluble solids, which cause inconvenience in the actual use of dosing control
Dithiocarbamate chelating agents have a strong ability to chelate heavy metal ions in wastewater, and are water-soluble liquids. It is easy to control dosing during actual use, but due to the high price of polyamine compounds, preparation The heavy metal chelating agent is expensive, causing the application of dithiocarbamate chelating agent to be limited, which affects the large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 70kg of hexamethylenetetramine is dissolved in 200kg of deionized water, and 150kg of sodium hydroxide dissolved in 300kg of deionized water is added at normal pressure and 70-80°C, mixed and stirred for 30-120 minutes; Add epichlorohydrin dropwise within 120-180 minutes under high pressure and 35-45°C, keep stirring and react for 90-120 minutes, then raise the temperature to 45-55°C and continue stirring for 120-150 minutes; ℃, stirring and dropping carbon disulfide within 90-120 minutes, stirring and temperature-controlling reaction at this temperature for 120-180 minutes to obtain a synthetic product.

Embodiment 2

[0023] Dissolve 70kg of hexamethylenetetramine in 200kg of deionized water, add 0.5kg of sodium carboxymethylcellulose, and add 150kg of sodium hydroxide dissolved in 300kg of deionized water into a reaction kettle at normal pressure and 70-80°C Mix and stir for 30 to 120 minutes; add 5kg of melamine, add epichlorohydrin dropwise at normal pressure and 35 to 45°C within 120 to 180 minutes, heat and stir for 90 to 120 minutes, then heat up to 45 to 55°C to continue Stir and react for 120 to 150 minutes; add carbon disulfide dropwise under normal pressure and 15 to 20°C within 90 to 120 minutes, and stir and control the temperature for 120 to 180 minutes at this temperature to obtain a synthetic product.

Embodiment 3

[0025] Weigh 5g of the novel heavy metal ion remover prepared in Example 1 into a 100ml volumetric flask, dilute to the mark with water, and set aside. Take pH 2.1, with Cr 3+ 92.8mg / L, total Fe 14.0mg / L, Ni 2+ 9.78mg / L, Cu 2+ 23.4mg / L, Zn 2+ 1L of 25.0mg / L wastewater containing heavy metal ions; adjust the pH to 7.5, add 1.7ml of diluted new heavy metal ion remover, stir for 5 minutes, let stand for 3 minutes, and filter the water.

[0026] Treated water contains only Cr 3+ 0.056mg / L, total Fe 0.043mg / L, Ni 2+ 0.057mg / L, Cu 2+ 0.0087mg / L, Zn 2+ 0.063mg / L.

[0027] Use a redox electrode to measure the potential drop of the redox reaction electrode to determine the end point of the reaction, and the potential drop is 60 millivolts (from +60 millivolts to -20 millivolts).

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PUM

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Abstract

The invention provides a method for preparing a novel heavy metal ion remover and an application thereof, and relates to a method for preparing a raw material of the heavy metal ion remover, a process for synthesizing the heavy metal ion remover and an application thereof. The invention is characterized in that the method comprises the following steps that: methenamine and epoxy chloropropane react with carbon bisulfide after the methenamine and the epoxy chloropropane are subject to the cross linking reaction, thereby obtaining a quaternary ammonium salt xanthate chelating agent-the novel heavy metal ion remover. The prepared novel heavy metal ion remover can be used for treating wastewater containing heavy metal ions, and the dosage and the adding process of the novel heavy metal ion remover can be controlled through detecting changes of an oxidation-reduction reaction electrode potential (ORP), thereby achieving the aim of automatically treating the wastewater containing the heavy metal ions with high efficiency.

Description

technical field [0001] The invention relates to a preparation method of a novel heavy metal ion remover and its application in the treatment of wastewater containing heavy metal ions. technical background [0002] Metal manufacturing, electronics, electroplating, chemistry, iron and steel and non-ferrous metal smelting and other industries discharge a large amount of heavy metal ions such as cadmium, chromium, lead, nickel, copper, zinc, cobalt, tin, vanadium, molybdenum, iron, manganese, etc. waste water. The treatment methods of wastewater containing heavy metal ions include chemical precipitation, ion exchange and adsorption. At present, the chemical precipitation method is commonly used at home and abroad to treat wastewater containing heavy metal ions. The principle is: according to the type and concentration of heavy metal ions contained in the wastewater, alkali agent (OH - ) to increase the pH value, so that various metal ions and OH - The reaction produces metal ...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F101/20
Inventor 陈德琪
Owner 陈德琪
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