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A kind of preparation method of heavy metal ion trapping agent for electroplating wastewater

A technology for heavy metal ions and electroplating wastewater, applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, water pollutants, etc. The effect of reducing the risk of re-pollution of the environment, facilitating sedimentation, separation and recovery, and shortening sedimentation time

Active Publication Date: 2021-09-03
襄阳先创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, existing Mn 2+ The heavy metal ion trapping agent has defects such as low manganese removal rate and unstable capture product when the environmental pH is low, which affects the treatment effect of electroplating wastewater. Therefore, it is necessary to develop a heavy metal ion trapping agent for electroplating wastewater The preparation method can ensure a high manganese ion removal rate in an acidic environment with a low pH, and can also ensure a high capture product stability in a changing environment

Method used

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  • A kind of preparation method of heavy metal ion trapping agent for electroplating wastewater
  • A kind of preparation method of heavy metal ion trapping agent for electroplating wastewater
  • A kind of preparation method of heavy metal ion trapping agent for electroplating wastewater

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Embodiment 1

[0029] A preparation method for a heavy metal ion trapping agent for electroplating wastewater, comprising the following steps:

[0030] (1) Pre-reaction: re-add 2.6 g of sodium methoxide and 4.2 g of tetraacetylethylenediamine into the organic solvent n-butanol solution, and stir for 20 minutes to obtain mixture A;

[0031] (2) Synthesis reaction: add 1 kg of methyl p-methoxycinnamate to mixture A, react at 100°C for 30 minutes, add 1 kg of phenylhydrazine after cooling down, heat up for 3 hours, cool to 20°C, continue to pass oxygen Under the condition of reaction 24h, obtain mixture B;

[0032] (3) Precipitation: After adjusting the pH of the mixture B to 6 with dilute hydrochloric acid, dimethyl isopropanolamine was added after the temperature was lowered to 0°C, the mixture B quickly precipitated a solid, and after suction filtration, a brown solid C was obtained;

[0033] (4) Dehydrogenation reaction: brown solid C is added in ethanol solution, sodium hydroxide solution...

Embodiment 2

[0037] A preparation method for a heavy metal ion trapping agent for electroplating wastewater, comprising the following steps:

[0038] (1) Pre-reaction: re-add 5.5 g of sodium methoxide and 12.2 g of tetraacetylethylenediamine into the organic solvent n-butanol solution, and stir for 30 minutes to obtain mixture A;

[0039] (2) Synthesis reaction: add 1.5kg methyl p-methoxycinnamate to mixture A, react at 120°C for 40min, add 2.2kg of phenylhydrazine after cooling down, heat up for 5h, cool to 25°C, continue to Reacted for 36h under the condition of ventilation to obtain mixture B;

[0040] (3) Precipitation: After adjusting the pH of the mixture B to 8 with dilute hydrochloric acid, dimethyl isopropanolamine was added after cooling down to 5°C, the mixture B quickly precipitated a solid, and after suction filtration, a brown solid C was obtained;

[0041] (4) Dehydrogenation reaction: Add the brown solid C to the ethanol solution, add potassium hydroxide solution and calci...

Embodiment 3

[0045] A preparation method for a heavy metal ion trapping agent for electroplating wastewater, comprising the following steps:

[0046] (1) Pre-reaction: re-add 4.0 g of sodium methoxide and 8.5 g of tetraacetylethylenediamine into the organic solvent n-butanol solution, and stir for 25 minutes to obtain mixture A;

[0047] (2) Synthesis reaction: add 1.2kg methyl p-methoxycinnamate to mixture A, react at 110°C for 35min, add 1.5kg of phenylhydrazine after cooling down, heat up for 4h, cool to 22°C, continue to Reaction for 30h under the condition of ventilation to obtain mixture B;

[0048](3) Precipitation: After adjusting the pH of the mixture B to 7 with dilute hydrochloric acid, dimethyl isopropanolamine was added after the temperature was lowered by 3°C, the mixture B rapidly precipitated a solid, and after suction filtration, a brown solid C was obtained;

[0049] (4) Dehydrogenation reaction: brown solid C is added in ethanol solution, sodium hydroxide solution is ad...

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Abstract

The present invention provides a method for preparing a heavy metal ion collector for electroplating wastewater, comprising the following steps: (1) adding a catalyst to n-butanol and stirring to obtain a mixture A; (2) adding p-methoxycinnamic acid Methyl ester, react, add phenylhydrazine after cooling down, heat up the reaction, cool down, and react under the condition of oxygen to obtain mixture B; (3) after adjusting pH, rapidly separate out after cooling down, and suction filtration to obtain brown solid C; (4) ethanol In the solution, add alkaline reagent, stir to dissolve, then add saturated copper sulfate solution and stabilizer, stir to obtain solid D; (5) wash and dry to obtain pale yellow solid E; (6) pulverize, add to it The flocculant forms a solid composition F, and the solid composition F is the desired product. The prepared heavy metal ion trapping agent of the present invention can also ensure a high manganese ion removal rate in an acidic environment with low pH, and can also ensure high trapping product stability in a changing environment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a heavy metal ion trapping agent for electroplating wastewater. Background technique [0002] Electroplating wastewater contains Cd 2+ 、Cr 3+ , Mn 2+ 、Ni 2+ with Zn 2+ Due to the high solubility of these ions in the water-based environment, they can be enriched in the food chain, easily absorbed by organisms, and may accumulate in the human body. When the content exceeds a certain level, it will cause damage to human health. The treatment methods of electroplating wastewater include precipitation method, ion exchange method, ferrite method, electrodialysis method, adsorption method, redox method and biological method, among which the precipitation method has the characteristics of less investment, low treatment cost and easy operation. It can withstand the impact of large water volume and high content load, and can be applied to the treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/54C02F101/20C02F103/16
CPCC02F1/54C02F2101/20C02F2101/206C02F2103/16
Inventor 姜守国
Owner 襄阳先创环保科技有限公司