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A new technology created to significantly improve the recovery of copper from solvent extraction organics.
Acid sulfate copper leach process liquors
Use a soluble pH modifier that produces no precipitate in mixers
Indirectly uses the cheapest alkali – limestone
Neutralise acid generated in the extraction mixer-settlers to drive higher copper extraction
Higher reagent loading
No complex pH control necessary
Easily incorporated in a “standard” Cu-SX flowsheet
Simple retrofit to an existing plant
Final raffinate concentration reduced from approx. 420 ppm Cu to <50 ppm Cu with the addition of pH modifier.
Patent lodged Application# PCT/AU2014/001024
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