Dividing wall distillation columns for production of high-purity 2-ethylhexanol and fractionation method using same

摘要

A dividing wall distillation column for producing high-purity 2-ethyl hexanol including a condenser, a reboiler and a main column having a dividing wall. The main column is divided into a column-top zone, an upper feed zone, an upper outflow zone, a lower feed zone, a lower outflow zone and a column-bottom zone. A crude 2-ethyl hexanol raw material (F) flows in a middle inflow plate NR1 in which the upper feed zone and the lower feed zone come in contact with each other, a low boiling point component (D) flows out from the column-top zone, a high boiling point component (B) flows out from the column-bottom zone, and a middle boiling point component (S) flows out through a middle outflow plate NR2 in which the upper outflow zone and the lower outflow zone come in contact with each other, where the middle boiling point component is 2-ethyl hexanol.