Extraction of copper from acid sulphate solutions by 2‐hydroxy‐5‐n‐nonyl and 2‐hydroxy‐4′‐n‐nonylbenzophenone oximes

Abstract
The study of copper extraction shows that the position of the chain (5 or 4′) does not influence the statics of copper extraction from ammonia solutions by alkyl derivatives of 2‐hydroxybenzophenone oxime. Acid solutions of 2‐hydroxy‐4′‐n‐nonylbenzo‐phenone oxime can extract more copper than 2‐hydroxy‐5‐n‐nonylbenzophenone oxime, but less than 2‐hydroxy‐5‐n‐alkylbenzaldehyde oxime.