A new extractant for highly efficient enrichment of trace nickel ions in the environment

An extraction agent, nickel ion technology, applied in extraction water/sewage treatment, improvement of process efficiency, preparation of organic compounds, etc., can solve the problem of difficult enrichment of trace nickel ions, etc. Ease of response

Active Publication Date: 2019-02-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the current extractant is difficult to enrich trace nickel ions

Method used

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  • A new extractant for highly efficient enrichment of trace nickel ions in the environment

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Experimental program
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Effect test

Embodiment 1

[0022] 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

[0024] 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

[0026] 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 patent of the present invention relates to a novel nickel ion extractant and its preparation method, which aims to extract and recover nickel ions in the water phase, and can be used to enrich and extract nickel ions; it is named as di‑N‑(N‑methyl‑N ‑Alkylacetyl)‑ethylenediaminediacetic acid, this extractant is produced by amidation reaction of EDTA (ethylenediaminetetraacetic acid) and N‑methyl‑N‑alkylamine. It is characterized by simple preparation and low price, and can be widely used for the removal and enrichment of nickel ions in sewage and water phase. The extraction rate of a single extraction of trace nickel from water can reach more than 97%, and the extraction capacity is high. The process loss is small, the stability is good, and it has good extraction performance for trace nickel ions in a relatively dilute solution. This extractant can be easily stripped under acidic conditions, and the recycling of the extractant is realized. In the formula, R represents an alkyl chain.

Description

technical field [0001] This patent relates to a novel extractant, which is used to extract nickel ions in water phase, and belongs to the field of environmental engineering materials. Background technique [0002] Nickel is a very important strategic resource, which can be used in military industry, people's livelihood, electronic technology and many other aspects. Nickel is similar to iron, but its overall properties are better than iron. According to data, my country and the United States are the countries with the largest demand for nickel in the world. For my country, the domestic sources of nickel are mainly two parts: newly produced nickel ore supply and recovered nickel, but a large part depends on imports. The reason is that my country's nickel ore reserves are small and of low quality and difficult to mine. Domestic ore-produced nickel is mainly open-pit mining and pyrometallurgy, which causes huge nickel pollution to the environment in the industrial process. Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02C07C237/06C22B3/32C22B23/00C02F1/26
CPCC02F1/26C02F2101/20C02F2103/16C07C231/02C07D265/32C22B23/0453C22B3/32C07C237/06Y02P10/20
Inventor 曹胜光孙国新彭修静
Owner UNIV OF JINAN
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