METHOD OF MULTI-PHASE EXTRACTION Russian patent published in 2002 - IPC

FIELD: multi-phase extraction in liquid-to-liquid system by solvents; chemical, hydrometallurgical, microbiological and other industries. SUBSTANCE: method includes bringing the phase to be extracted in contact with extractive reagent in external chamber and re-extraction of extractive reagent in contact with absorbing phase in re-extraction chamber. Extraction is conducted at many stages; each stage includes extraction and re-extraction chambers; extractive reagent is fed in crossing flow with absorbing and extractable phases inside one stage. Extractable and absorbing phases are passed through several or through all stages in counter flow. EFFECT: enhanced efficiency due to optimization of delivery of phases and interconnected of separating stages. 6 cl, 10 dwg