Unlock instant, AI-driven research and patent intelligence for your innovation.

Solvent Extraction Process For Separating Cobalt And/Or Manganese From Impurities In Leach Solutions

a technology of impurities and solvents, applied in the direction of inorganic chemistry, dissolving, silver compounds, etc., can solve the problems of hydroxyoxime and carboxylic acid organic solutions being susceptible to degradation

Inactive Publication Date: 2008-02-14
COMMONWEALTH SCI & IND RES ORG
View PDF7 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is based on the development of an organic solution of a carboxylic acid and a hydroxyoxime that can shift the pH isotherms of certain elements in a way that allows separation of them from each other. This solution can effectively separate cobalt, zinc, copper, and manganese from calcium, magnesium, and other impurity elements in a leach solution. A stabilizer may be added to prevent degradation of the solution. The invention also provides a process for selectively stripping the organic phase to separate manganese from cobalt. The recovered elements can be further purified using bulk stripping, ion exchange, or sulphide precipitation.

Problems solved by technology

Under some conditions, the organic solution of carboxylic acid and hydroxyoxime may be susceptible to degradation, particularly with respect to the hydroxyoxime component.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solvent Extraction Process For Separating Cobalt And/Or Manganese From Impurities In Leach Solutions
  • Solvent Extraction Process For Separating Cobalt And/Or Manganese From Impurities In Leach Solutions
  • Solvent Extraction Process For Separating Cobalt And/Or Manganese From Impurities In Leach Solutions

Examples

Experimental program
Comparison scheme
Effect test

example 1

Extraction pH Isotherms of Metals with Versatic 10 / LIX63 Synergistic System

[0075]This example illustrates that when carboxylic acid 25 Versatic 10 is used as the extractant with no added synergist, the pH isotherms of the “valuable” elements Zn, Ni, and Co are too close to the isotherms of the “impurity” elements Mn, Ca and Mg for effective separation. However when a synergistic system comprising Versatic 10 and hydoxyoxime LIX 63 is used, the isotherms of the “valuable” elements Cu, Zn, Ni, and Co are sufficiently separated from the isotherm of Mn to allow effective separation. Further, the isotherm of Mn is sufficiently separated from the isotherms of Ca and Mg to allow effective separation.

[0076]The aqueous solution was a synthetic solution to simulate a typical laterite leach solution containing 3 g / L Ni, 0.3 g / L Co, 0.2 g / L Cu and Zn, 2 g / L Mn, 10 g / L Mg and 0.5 g / L Ca.

[0077]The metal extraction pH isotherms with the 0.5 M Versatic 10 (carboxylic acid) alone were determined and...

example 2

Extraction Kinetics with Versatic 10 / LIX63 synergistic system.

[0079]This example illustrates that when the synergistic system comprising Versatic 10 and LIX 63 is used, Cu, Co, Zn and Mn display fast extraction kinetics, while the extraction kinetics for Ni are slow. Hence this system is potentially suitable for Cu, Co, Zn and Mn recovery when the leach solution contains little Ni.

[0080]Tests were conducted to establish the extraction kinetics of the metals in the synthetic laterite solution using Versatic 10 / LIX63. The extraction kinetics of copper, cobalt, zinc (and manganese—see Example 6 and FIG. 8) were found to be fast and the extraction kinetics of nickel were found to be relatively slow (FIG. 3). Within 30 seconds, only 55% Ni was extracted and within 2 minutes, only 74%. It is noted that Mn and Zn are crowded out as Ni extracts.

example 3

Stripping Kinetics with Versatic 10 / LIX63 Synergistic System

[0081]This example illustrates that when the synergistic system comprising Versatic 10 and LIX 63 is used, Cu, Co, Zn and Mn display fast stripping kinetics, while the stripping kinetics for Ni are slow. Hence this system is potentially suitable for Cu, Co, Zn and Mn recovery when the leach solution contains little Ni.

[0082]Tests were conducted to determine the stripping kinetics of the metals from the 0.5 M Versatic 10 / 0.35 M LIX63 system using a strip solution containing 5 g / L Ni and 10 g / L sulphuric acid (FIG. 4). The stripping kinetics of copper, cobalt and zinc were fast. The stripping kinetics of nickel were slow, with only 18% of the nickel being stripped after 2 minutes of mixing.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

A process for the separation of cobalt and / or manganese from impurity elements selected from one or more of calcium and magnesium contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extraction using an organic solution of a carboxylic acid such as Versatic 10 and a hydroxyoxime such as LIX 63, optionally together with a stabilzer.

Description

[0001]The present invention relates to a process for separating cobalt and / or manganese from calcium and magnesium contained in an aqueous solution such as an aqueous leach solution, and for recovering the cobalt and / or manganese where desired.[0002]The world mineral industry is experiencing an unprecedented interest in metal extraction from laterite and sulphide ores through hydrometallurgical processes. Commonly, the hydrometallurgical process involves grinding, leaching and solvent extraction (SX), with recovery of product via precipitation or reduction processes. The intensity of the leaching process (temperature, pressure, bio) depends on the nature of the ore (mineralogy, grade), the distribution of the metal(s) to be recovered and the particle size reduction achieved during grinding. Leach solutions often contain copper, nickel, cobalt and zinc (and / or manganese) as metals to be recovered (target metals), with calcium, magnesium, iron and aluminium (and manganese if not to be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): C22B3/40C22B23/00C22B3/30C22B3/32C22B47/00
CPCC22B3/0017C22B47/0081C22B23/0453C22B3/0028C22B3/30C22B3/326Y02P10/20
Inventor CHENG, CHU YONGURBANI, MARK DANIEL
Owner COMMONWEALTH SCI & IND RES ORG