Method of and apparatus for continuous counter current liquid/liquid extractions

摘要: 696,114. Making extracts. METALLGES., AKT.-GES. Oct. 19, 1951, No. 24491/51. Class 81 (i). In a method of continuous countercurrent liquid/liquid extraction in plurality stages, the mixing and conveying liquids is effected by centrifugal pumps which are disposed separate pump spaces individual chambers extractor corresponding to stages. Preferably having flat characteristic curve used so that small variation liquid level space leads large quantity delivered. As shown Fig. 1, heavier enters stage at 4 passes up pipe 5, over weir 6, into 30 from whence it pumped admixture with lighter through tubes 12 13 chamber 14 thence separating 33. similar manner passed stages band c finally leaving apparatus an overflow 21 22. The led conduit 7 32 where mixed liquid. mixture raised 11 pipes distributing 35 c. light layer flows funnel (not 1) 31 b. It then a. From leaves 16. event failure intermediate b, two layers formed 31. lower stratum inclined tube 24 upper 25 According another modification (Fig. 4) represent sectors circle when seen plan. Each 54, cylindrical 53, draws heavy bottom circumferential part settling riser 55 top next but one line 56 58 central chamber. pass centre circumference each chamber, separation increases virtue decrease velocity flow.