SX-EW method - SX-EW method

Japanese: SX‐EW法 - エスエックスイーダブリュほう

Abbreviation for Solvent Extraction and Electrowinning. In Japanese, it is called solvent extraction electrowinning. This technology was developed in the early 1960s and began to be used in actual production in 1969. It is used to recover copper from acidic extracts containing copper that have been dissolved from low-grade ores and waste rocks. A special organic solvent is added to the acidic extract containing copper and stirred, and copper is extracted with this solvent, which is then back-extracted to produce an acidic solution containing copper that can be electrolyzed. This acidic solution is then directly electrolyzed to obtain electrolytic copper.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

Solvent Extraction and Electrowinning法の略。日本語で溶媒抽出電気採銅法という。1960年代初めに開発され，69年に実際の生産に使われるようになった技術で，低品位の鉱石や廃石から溶出した銅を含んだ酸性抽出液から銅を回収するために使われる。銅を含んだ酸性抽出液に特別な有機溶媒を加えて攪拌して，銅をこの溶媒で採収し，さらに逆抽出して電解可能な銅を含む酸性溶液とする。この酸性溶液を直接電解処理して電気銅を得る。

出典　株式会社平凡社世界大百科事典第２版について　情報

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