Barbotage – pushing gas through a layer of liquid. Used to heat liquid with steam, to stir aggressive liquids and abrasive slurries. Barbotage also is an associate process during absorption, fractionation and flotation. A big phase contacting area (liquid – gas) is generated during barbotage intensifying heat exchange and mass exchange processes and providing for better chemical interaction between gases and liquids. The most basic equipment for barbotage is a pipe in the vessel filled with liquid through which properly compressed gas is fed. To avoid gas jet hitting the bottom of the vessel, the lower end of the pipe is bent. For more even and effective barbotage several horizontal 3–6 millimeter diameter pipes are used. During absorption and fractionation barbotage takes place at the trays of the so-called barbotage towers.