Patent ID: 7282118
Filing Date: 2007-10-16
Classification: B01D,Y10S

Abstract:
1. A method for the purification of an easily polymerizable substance, comprising the step of using a distillation column provided in at least part thereof with (a) a tray fixed with a bolt and a nut to a support ring fitted to the inner wall of the column or (b) a tray fixed to a support ring fitted to the inner wall with a vertical clamp and provided in the lower part thereof with a splash collision; wherein at least one liquid passing opening is provided to a joint part between said support ring and the inner wall of said column and said tray is a dualflow tray and said splash collision plate having an opening area ratio of said tray in the range of 30% to 70% or a splash collision plate being a disc-and-doughnut type collision plate and/or a segment baffle type collision plate having a total opening area of said collision plate and a segmental opening in the range of 10% to 90% relative to a cross section of the column.