We used vortex contact devices that we developed and investigated to make a new design of an alcohol diabatic distillation column with heat exchange pipes (as the reflux condenser) passing through concentrating section trays. In the column. ascending vapors partially condensed on the surface of vertically installed heat exchange tubes. forming a reflux. https://www.getpureroutine.com/hot-save-color-touch-77-45-cheap-limited-grab/