Copper recovery using leach/solvent extraction . - SAIMMleach/solvent extraction/electrowinning. (L/SX/EW) process for copper recovery, considered by some to be one of the great advances in copper recovery.solvent extraction copper,Copper Separation and Processing in Hydrometallurgy - CiteSeerXTechnical Review – Copper Solvent. Extraction in Hydrometallurgy. MTRL 557. Submitted to Dr. David Dreisinger. By Patrick Littlejohn. December 2007.