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Application of asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains in separation of transition metal elements

A transition metal element, ethylhexyl technology, applied in the direction of improving process efficiency, can solve the problems of large consumption of extractant, slow two-phase separation, long extraction time, etc., and achieves good chemical stability, fast extraction speed, The effect of fast phase separation

Inactive Publication Date: 2019-10-22
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of low selectivity, low extraction efficiency, long extraction time, slow two-phase separation, and large consumption of extraction agent when the current extractant selectively separates silver from transition metal elements. The 2-ethylhexyl side chain oligoamide extractant, due to the effect of three-center hydrogen bonds, makes the molecule appear as a flat meniscus, and the unclosed cavity contains carbonyl oxygen, and these carbonyl oxygen chelate with metal ions It can be used to selectively separate silver from transition metal elements, and it can be used as an extractant to efficiently separate silver from transition metal elements under acidic conditions.

Method used

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  • Application of asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains in separation of transition metal elements
  • Application of asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains in separation of transition metal elements
  • Application of asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains in separation of transition metal elements

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Experimental program
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Effect test

Embodiment 1

[0033] A kind of oligoamide containing 2-ethylhexyl side chain is used as extractant in the selective separation of silver from transition metal elements, it is characterized in that: the oligoamide containing 2-ethylhexyl side chain has the following structure:

[0034]

[0035] n=2.5 in the above structural formula

Embodiment 2

[0037] The transition metal elements are selected from transition metal elements Cr, Co, Ag, Cu, Zn, Cd, Ni.

[0038] The oligopolyamide containing 2-ethylhexyl side chain is used as an extractant in the separation of transition metal elements and silver ions. The extraction results are shown in Table 1:

[0039] The molar ratio of extractant to transition metal element is 1:1

[0040] The concentration of the extractant after dilution with dichloromethane saturated water is 1×10 -4 mol / L

[0041] The aqueous phase is Cr(NO 3 ) 3 , Co(NO 3 ) 2 , AgNO 3 , Cu(NO 3 ) 2 , Zn(NO 3 ) 2 ,Cd(NO 3 ) 2 , Ni(NO 3 ) 2 :1×10 - 4 mol / L; ph=3.97; temperature: 25°C; phase: 1 / 1; shaking: 2 hours.

[0042] Table 1

[0043]

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Abstract

The invention relates to an application of an asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains in separation of transition metal elements, and belongs to the technical field ofnoble metal extraction recovery. Due to the fact that the extractant contains three-center hydrogen bonds, the conformation of the oligomer is in a plane meniscus shape, and the oligomer is capable of selectively complexing metal ions with an unclosed cavity and carbonyl oxygen in the cavity, so that the selective separation of the ions is achieved; and the asymmetric oligopolyamide extractant containing 2-ethylhexyl side chains is good in chemical stability and easy to synthesis and obtain, can be used for selectively separating silver from the transition metal elements under different acidity, and in addition, the extractant has the advantages of high extraction speed, high phase separation speed and the like, so that the asymmetric oligopolyamide extractant containing 2- ethylhexyl side chain has practical application prospect.

Description

technical field [0001] The present invention relates to a new application of a class of oligoamide molecules, more specifically, the present invention relates to the application of a kind of oligoamide containing 2-ethylhexyl side chains as extractant in the selective separation of silver from transition metal elements . Background technique [0002] Due to its unique physical and chemical properties, silver is widely used in electronic appliances, chemical production, and electronic electroplating industrial preparations, and certain physiological properties can play an important role in the field of biomedicine. Photosensitive materials are currently one of the fields with the largest amount of consumption. In the 1990s, the amount of silver used in the world’s photographic industry was about 6000-6500 tons, plus the consumption of silver and silver-based electrical contact materials was about 2900-3000 tons. The demand for silver The volume is increasing year by year. ...

Claims

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Application Information

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IPC IPC(8): C22B3/28C22B11/00
CPCC22B11/00C22B3/282C22B3/284Y02P10/20
Inventor 池哲鑫贺有周
Owner CHONGQING TECH & BUSINESS UNIV
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