TY - JOUR AU - Slater, Michael J. AB - tionsliip of slip velocity and hold-up was obtained. An example is shown in Fig. 2 . Hold-up relationships in solvent extraction and ion exchange equipment Michael 1. Slater * The optimal design of continuous counter-current equipment for solvent extraction and ion exchange requires an understanding of the relationship between the hold-up of dispersed phase and the flow rates of the two phases. For solvent extraction columns the relationship will depend on inter droplet coalescence rates ; the drop size is a key parameter in design. Once hold-up and drop size are established as a function of flow rates a good basis for the prediction of the mass transfer performance is also established. The concept of a slip velocity [I], VD, is used and is defined by VD = ( U s / h ) V s / ( l - h ) (1) where U s and V sare superficial velocities of the phases and h the hold-up of the dispersed phase. For particles or drops in an infinite liquid system, V D would be expected t o equal V T , the terminal velocity under those conditions. Terminal velocities of solid particles such as ion exchange resin TI - Hold‐up relationships in solvent extraction and ion exchange equipment JF - Chemie-Ingenieur-Technik (Cit) DO - 10.1002/cite.330461515 DA - 1974-08-01 UR - https://www.deepdyve.com/lp/wiley/hold-up-relationships-in-solvent-extraction-and-ion-exchange-equipment-30RDLD5oCF SP - 663 EP - 663 VL - 46 IS - 15 DP - DeepDyve ER -