Optimization and Control of Rectification Units

For the final selection of column internals, mixture behavior, operating conditions, characteristic performance figures, costs, pressure drop, and other criteria are important. Substantial criteria are listed in Table 2-31. 

Different evaluation criteria prove to have an opposite influence. For example, the requirement of good separation efficiency leads to a higher pressure drop and higher costs. The selection of column inter- 

Representation according to Vereinigte FUllkOrper-Fabriken GmbH, Ransbach-Baumbach. 

System Isooctane — toluene operating pressure .013 bar column diameter 400 mm reflux ratio oo 

Thermal sensitivity, contamination tendency, foaming properties, material properties 

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Choice, Optimization and Control of Rectification Units 217 Table 2-31. Column internals selection criteria. 

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