In the production of products and consumer goods in process engineering production plants, thermal separation processes play a special role alongside chemical substance conversion and often account for the largest portion of operating and investment costs. This book provides a clear, understandable, and practice-oriented comprehensive presentation of these thermal separation processes and their integration into the overall system. A comprehensive introductory chapter elucidates the physical and physicochemical laws and principles that underlie all thermal separation processes. This is followed by a practice-oriented presentation of methods, design principles, and apparatus implementations in distillation and partial condensation, absorption, adsorption, drying, extraction, solution evaporation, and crystallization.