Rotating disc contactor (RDC) is one of the most important extraction columns for liquid-liquid extraction. A single-stage horizontal axis RDC (HRDC) was developed and used for extraction of emulsion system. The extractor composed characteristics of narrow mixing space of 1 mm and oil-wet slits. For ethanol/water/2-ethyl-hexanol system, both mass transfer and phase separation were enhanced simultaneously, and the extraction efficiency was higher than single equilibrium stage. The results showed the sufficient mass transfer achieved at low-rotation speed in a short time. Extract phase separation was enhanced by crossing the narrow oil-wet slits repeatedly to make oil droplets coalescence. The circulation flow played a key factor for the higher efficiency. The extractor was simulated with Aspen Plus©.

圆盘接触器（RDC）是液-液萃取最重要的萃取塔之一。开发了单级水平轴RDC（HRDC），并将其用于提取乳液系统。萃取器具有1 mm的狭窄混合空间和油湿狭缝的特征。对于乙醇/水/ 2-乙基己醇体系，传质和相分离同时得到增强，萃取效率高于单个平衡阶段。结果表明，在短时间内以低转速实现了足够的传质。通过反复穿过狭窄的油湿狭缝以使油滴聚结，可增强萃取物的相分离。循环流是提高效率的关键因素。提取器用Aspen Plus©模拟。