Novel extraction agent capable of efficiently enriching micro copper ions in environment

A technology of trace copper and extractant, applied in the direction of improving process efficiency, etc., can solve the problem of difficult enrichment of trace copper ions, and achieve good extraction performance, short extraction time and high extraction capacity

Active Publication Date: 2017-03-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the probl...

Method used

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  • Novel extraction agent capable of efficiently enriching micro copper ions in environment
  • Novel extraction agent capable of efficiently enriching micro copper ions in environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take the asymmetric N-methyl-N-butylamine synthetic extractant as an example: in the first step, 58g of ethylenediaminetetraacetic acid is dehydrated with acetic anhydride at 55°C to generate 45.8g of its anhydride, and the yield is stable at about 90%. . In the second step, 25g of ethylenediaminetetraacetic dianhydride and 17g of N-methyl-N-butylamine synthesize the extractant di-N-(N-methyl-N-butylacetyl) in DMF in the presence of DMAP - 33.6g of ethylenediaminediacetic acid, the reaction temperature is 70-80°C, the reaction time is 12 hours, and the average yield of the final synthesis is about 80%.

Embodiment 2

[0026] Take the asymmetric N-methyl-N-octylamine synthetic extractant as an example: the first step is the same as in Example 1. In the second step, 25g ethylenediaminetetraacetic dianhydride and 27.9gN-methyl-N-octylamine synthesize the extractant di-N-(N-methyl-N-octylacetyl in DMF in the presence of DMAP )-42.4g of ethylenediaminediacetic acid, the reaction temperature is 70-80°C, the reaction time is 12 hours, and the average yield of the final synthesis is about 80%.

Embodiment 3

[0028] Take the asymmetric N-methyl-N-laurylamine synthetic extractant as an example: the first step is the same as in Example 1. In the second step, 25g ethylenediaminetetraacetic dianhydride and 38.9gN-methyl-N-laurylamine synthesize the extractant di-N-(N-methyl-N-lauryl acetyl in DMF in the presence of DMAP )-51.2g of ethylenediaminediacetic acid, the reaction temperature is 70-80°C, the reaction time is 12 hours, and the average yield of the final synthesis is about 80%.

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Abstract

The invention relates to a novel copper ion extraction agent and a preparation method thereof. The extraction agent has very strong capability of combining copper ions, can be used for enriching and recycling micro or trace copper ions in water, is named as 2-N-(N-methyl-N-alkylacetyl)-ethylenediamine diacetate and is formed by amidation between EDTA (ethylenediaminetetraacetic acid) and N-methyl-N-alkylamine. The extraction agent has the characteristics that the preparation is simple and convenient, the price is low, and the extract agent can be widely applied to removal and enrichment of copper ions in industrial waste water or sewage, has the one-time extraction rate of 97% or above when used for extracting micro copper from weak-acid and neutral water, is high in extraction capacity, small in loss during extraction and good in stability, and has very good extraction performance when used for extracting micro copper ions in a dilute solution. The extraction agent can easily perform reverse extraction under an acid condition, and can be recycled. In the formula (as shown in the description), R represents alkyl chain.

Description

technical field [0001] This patent relates to a novel extractant, which is used to extract copper ions in water phase, and belongs to the field of environmental engineering materials. Background technique [0002] Copper is a very important non-renewable mineral resource. As a large developing country, the amount of copper used in my country is increasing year by year. However, the domestic copper ore is mostly low-grade and difficult to extract. Therefore, hydrometallurgy technology is often used. Hydrometallurgy and other industries will produce a large amount of waste water, causing copper ions in the environment to exceed the specified indicators and causing pollution. This is a very realistic problem that needs to be solved urgently. [0003] As heavy metal ions, copper ions in surface water, industrial wastewater and soil are very harmful to the human body. If these copper ions exist in the natural environment for a long time, they will eventually flow into human life ...

Claims

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Application Information

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IPC IPC(8): C22B3/32C22B15/00
CPCC22B15/0084C22B3/32Y02P10/20
Inventor 孙国新曹胜光司繁彬
Owner UNIV OF JINAN
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