The Most Interesting Splits of Columns with Decanters

The Most Interesting Splits of Columns with Decanters 

The sphts in the colunms with decanters are the most interesting for synthesis, if in the concentration simplex there are regions of existence of two liquid phases RegL-L and a heteroazeotrope that is the unstable node of the concentration simplex C or its boundary element having a trajectory tear-off region of the 

In the listed cases, one chooses the split at which a vapor close in composition to heteroazeotrope yo N az column to the decanter, one of the 

The above-discussed algorithms of presynthesis for simple columns, columns with two feedings, and columns with decanters do not require visualization and can be executed automatically, which allows them to be used for mixtures with any number of components. 

However, visualization can be useful at the ends of the sequence, when ternary and binary azeotropic mixtures are obtained. Visual analysis of distillation diagrams is desirable at this stage of presynthesis and synthesis for application of such separation methods as usage of curvatures of distillation regions boundaries, of different of the pressure in the columns, and of entrainers (see Section 8.5). 

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