Chapter 23: Leaching and Extraction

23.1 Introduction 3
23.1.1 Related important references 3
23.1.2 Leaching and Extraction 3
23.2 Leaching 3
23.2.1 Preparation of Solid Leaching 4
23.3 Equipment used in Leaching Operations 5
23.3.1 Discontinuous extraction 5
23.3.1.1 Discontinuous Apparatus 6
23.3.2 Continuous extraction 7
23.3.2.1 Continuous extraction apparatus 8
23.4 Process Calculation Methods for Leaching 14
23.4.1 Equilibrium Relations and Single-Stage Leaching 14
23.4.2 Few terminology definitions 14
23.4.3 Calculation of the Number of Stages 15
23.4.4 Leaching Calculation Examples 18
23.5 Liquid-Liquid Extraction 25
23.5.1 Typical examples in CPI 25
23.5.2 Comparison between Liquid-liquid extraction and Distillation 25
23.5.3 Solvent Selection Criteria 26
23.6 Equipment Involved in Liquid-Liquid Extraction 27
23.6.1 Single step mixer-settler 27
23.6.2 Continuous 28
23.7 Process Calculation Methods 38
23.7.1 Conjugate line 42
23.7.2 Separation factor 43
23.7.3.1 Effect of Temperature on Solubility Diagram 45
23.7.4 Equilibrium data on Rectangular Diagram 46
23.7.4.1 Addition of two streams 47
23.7.4.2 Subtraction of two streams 48
23.7.5 Methods of Operation (Types of contact) 48
23.8 Continuous contact (packed or spray columns) 54
23.9 Examples of Liquid-Liquid Extraction Calculations 56
23.10 References 77

Share this post