Abstract: This paper describes a mathematical model and an algorithm which can be used for simulation of in-terlinked column systems consisting of liquid-liquid extraction and distillation.This algorithm is basedupon Newton-Raphson iteration technique using suitable damping factors and solutions of simplified modelas initial values of exact calculations.With the exception of principle specification it is possible to interchangethe iteration variables and/or noniteration variables with design variables to meet requirements of design.A process of recovery of phenol from waste water containing pheonol is illustrated to varify the model andalgorithm.The results are satisfied.

摘要： This paper describes a mathematical model and an algorithm which can be used for simulation of in-terlinked column systems consisting of liquid-liquid extraction and distillation.This algorithm is basedupon Newton-Raphson iteration technique using suitable damping factors and solutions of simplified modelas initial values of exact calculations.With the exception of principle specification it is possible to interchangethe iteration variables and/or noniteration variables with design variables to meet requirements of design.A process of recovery of phenol from waste water containing pheonol is illustrated to varify the model andalgorithm.The results are satisfied.