DIVIDED WALL COLUMNS

Disclosed is a divided wall column, comprising: a column shell; a divided wall provided vertically inside the column shell, defining a divided wall section between an upper edge and a lower edge of the divided wall; and a liquid distributor provided within the divided wall section, characterized in that, the liquid distributor is fixed only to the column shell but not to the divided wall. By using the divided wall column of the present invention, a defect involved in conventional divided wall columns, i.e. a maldistribution of fluid over mass transfer elements caused by a manufacturing defect of the divided wall resulted from its manufacturing process and/or a deformation thereof under operation conditions, can be minimized or even avoided.