The continuous extraction of an amino acid, L-tryptophan, from aqueous solutions was studied in small channels with diameters of 0.5 and 2 mm. L-tryptophan was separated from nitric acid solutions into hexane using Di(2-ethylhexyl)phosphoric acid (D2EHPA) as extractant. It was found that the plug flow dominated in the flow pattern map at mixture velocities below 0.1 m/s and all organic phase volume fractions in the 0.5 mm channel, while it appeared at mixture velocities below 0.02 m/s and organic phase volume fractions below 60% in the 2 mm channel. During plug flow, the specific interfacial area increased with mixture velocity and acquired maximum values of 4432 and 1456 m²/m³ in the 0.5 and 2 mm channels, respectively. Extraction efficiencies and percentage of up to 95% and 50% were reached in the 0.5 mm channel for residence times less 45 s, while both values were about 5–10% less in the 2 mm channel. Mass transfer coefficients of up to 0.16 and 0.13 s⁻¹ were reached in the 0.5 mm and 2 mm channels, respectively.

在直径为 0.5 和 2 mm 的小通道中研究了从水溶液中连续提取氨基酸 L-色氨酸。使用二(2-乙基己基)磷酸 (D2EHPA) 作为萃取剂，将 L-色氨酸从硝酸溶液中分离到己烷中。发现在混合速度低于 0.1 m/s 和 0.5 mm 通道中的所有有机相体积分数时，活塞流在流型图中占主导地位，而在混合速度低于 0.02 m/s 和有机相体积分数以下时出现活塞流60% 在 2 mm 通道中。活塞流过程中，比界面面积随混合速度的增加而增加，最大值分别为4432和1456 m ² /m ³分别在 0.5 和 2 mm 通道中。在 0.5 毫米通道中，停留时间少于 45 秒时，提取效率和百分比分别高达 95% 和 50%，而在 2 毫米通道中，这两个值都减少了约 5-10%。在 0.5 mm 和 2 mm 通道中分别达到了高达 0.16 和 0.13 s ^{-1的传质系数。}