METHODS OF OPTIMIZATION THERMODYNAMICS IN PROCESS OF RECTIFICATION
The processes of rectification of binary and multicomponent mixtures are considered. It is shown that the dependence of the column productivity on the heat consumption for the most common kinetics of heat and mass transfer is close to a quadratic parabola bounded from above, the coefficients of which are related to the flow parameters, temperatures in the cube and in the dephlegmator. The relationship between the reflux ratio and these coefficients is given. It is shown that the efficiency of the column in the maximum performance mode is close to half of the reversible efficiency. An algorithm for choosing the sequence of separation of multicomponent mixtures and load distribution between parallel columns is proposed. The optimal value of the share of product selection is found. The problem of the expediency of using a separating agent to improve the efficiency of separating mixtures with close boiling points of the components is considered.