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Modification of copper/iron selectivity in copper solvent extraction systems

A selective, solvent-based technology, applied in the field of copper and iron, can solve the problems of economic impact, iron abundance, etc.

Inactive Publication Date: 2011-02-02
CYTEC TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the amount of iron that must be added to compensate for losses due to drainage may be too high
The addition of iron can negatively affect the economics of the operation

Method used

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  • Modification of copper/iron selectivity in copper solvent extraction systems
  • Modification of copper/iron selectivity in copper solvent extraction systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The extractant composition was prepared as described in the table below. Then 150 ml of each extractant composition was combined with 150 ml of an "extracted" aqueous solution containing 1.8 g / L of Cu, 1.0 g / L of Fe (with Fe(III) content of 0.042 g / L), and a pH of 2.1 Stir together. The aqueous and organic phases were stirred together for 3 minutes to simulate extraction. After 3 minutes, the extractant composition was separated and the organic phase was sampled. The metal-loaded extractant was then mixed with 30 ml of a "back extraction" aqueous solution containing 35.3 g / L Cu and 179 g / L sulfuric acid for 3 minutes. After separation, the extractant composition is sampled. Then analyze the copper content and iron content in the organic phase sample. The following table lists the transfer coefficient results of each extractant composition.

[0054]

Extractant composition

cycle

Cu / Fe

Organic

copper

Organic

iron

Cu％

Transfer

(G / l)

(G / l...

Embodiment 2

[0058] By combining equal parts of 2-hydroxy-5-nonylsalicylic aldoxime (aldoxime) and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (a modifier) ​​with each Tributyl phosphite (TBP) of various qualities was mixed to prepare an extractant composition. In each case, use Orfom SX7 (diluent) to mix 11.76 g (0.179M) aldoxime, 7.23 g (0.1M) modifier and 0 g (blank); 0.118 g (0.00179M) and 1.18 g (0.0179) M) TBP (95% purity) is made up to 0.25 liters.

[0059] Then, 200 ml of the extractant composition and 200 ml of the "extraction" containing 3.5 g / L of Cu, 3.8 g / L of Fe (with Fe(III) content of 1.0 g / L), and pH of 2.1 The aqueous solution was stirred for 30 minutes to simulate extraction. After 30 minutes, the extractant composition was separated from the water phase and sampled. The extractant preparation was then stirred with 40 ml of a "back-extraction" aqueous solution containing 35.3 g / L Cu and 179 g / L sulfuric acid for another 30 minutes. After separation, the extractant com...

Embodiment 3

[0063] By combining equal parts of 2-hydroxy-5-nonylsalicylic aldoxime (aldoxime) and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (improving agent) with various qualities The bis(2-ethylhexyl) phosphoric acid (DEHPA) was mixed to prepare an extractant composition. In each case, use Orfom SX7 (diluent) to mix 11.76 g (0.179M) aldoxime, 7.23 g (0.1M) modifier and 0 g (blank); 0.149 g (0.00179M) and 1.49 g (0.0179) M) DEHPA (97% purity) is made up to 0.25 liters.

[0064] Then, 200 ml of the extractant composition and 200 ml of the "extraction" containing 3.5 g / L of Cu, 3.8 g / L of Fe (with Fe(III) content of 1.0 g / L), and pH of 2.1 The aqueous solution was stirred for 30 minutes to simulate extraction. After 30 minutes, the extractant composition was separated from the water phase and sampled. The extractant preparation was then stirred with 40 ml of a "back-extraction" aqueous solution containing 35.3 g / L Cu and 179 g / L sulfuric acid for another 30 minutes. After separation, ...

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Abstract

A solvent extraction composition for the recovery of metals, particularly copper and iron, from leach solutions, comprises one or more orthohydroxyarylaldoximes and / or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers consisting of phosphinic and / or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers is provided. The solventextractant formulation enables to achieve controlled respectively desired metal transfer ratio's.

Description

Technical field [0001] The present invention relates to a solvent extraction composition and a solvent extraction method, in particular to a method for extracting metals, especially copper and iron, from aqueous solutions, especially solutions obtained by leaching ore. Background technique [0002] It is known that metals, specifically copper, and much less iron can be extracted from aqueous solutions containing metals (for example in the form of salts). This method is carried out in the following manner: The solution phases in the water-immiscible organic solvent are contacted, and then the metal-loaded solvent phase, that is, the solvent phase containing at least a part of the metal in the form of a complex, is separated. The metal can then be recovered by stripping with a lower pH solution (electrolyte) and then electrolytic extraction, for example. The most common situation is that the metal-containing aqueous solution used for extraction is obtained by acid leaching the ore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B3/30
CPCC22B3/0067C22B15/0063C22B3/0068C22B3/0095C22B15/0084C22B3/0066C22B3/0017Y02P10/20C22B3/30C22B3/3842C22B3/3844C22B3/3846C22B3/409
Inventor O·S·廷克勒K·A·克里莫P·E·特特洛J·坎贝尔C·J·麦斯
Owner CYTEC TECH CORP