Process for the separation of systems containing two or more substances having an intermediate boiling point in a separation column with a side stream.

摘要

In the process, the temperatures Tu and To are measured above and below the side stream on the column or in the interior of the column and the temperature difference Tu - To is used to control the side stream. The control is carried out in such a manner that one of the two temperatures Tu or To is held constant via the evaporator output or the bottom withdrawal or the reflux or the removal of distillate or the reflux ratio.