Abstract: Redistribution devices in a packed column are provided for mixing and redistribution of both downflowing liquid and upflowing vapor to reduce liquid to vapor concentration gradients. In one form, the vapor is redistributed by first risers directing vapor streams outwardly toward the column and second risers located adjacent the column solely directing vapor streams toward the column center.

Abstract: A pan-type liquid distribution assembly or fractionator which regulates the liquid flow through distribution tubes and, at the same time, provides for clearing away of unwanted fouling material which, in the past, has served to detract from the operation by plugging or partially plugging the liquid pour-points. Adjustment of the flow through, and/or, the unfouling of, the liquid pour-tubes can be performed from a point external of the fractionator, so as not to interfere with the ongoing operation of the fractionation column. A further feature is the ability to adjust liquid flow through each individual tube to alter the distribution pattern of the liquid across the top of a packed fractionation bed.