Abstract: The structures of interfacial turbulence phenomena in multicomponent evaporation,and physical absorption and desorption processes were observed by using Schlieren photography.It was found that structure of interfacial turbulence was characteristic of interfacial mass transfer process.In physicial absorption and desorption processes of carbon dioxide into and from liquid methanol,toluene,chlorobenzene,and isobutanol,orderly roll and polygonal cellular convection were observed.These orderly flow patterns were dissipative structures.It was also found that at room temperature,evaporation processes of some pure organic liquids,such as ether,trichloromethane,carbon tetrachloride,and acetone etc.,showed strong interfacial convection,but the evaporation processes of other liquids,such as benzene,toluene,chlorobenzene,ethanol,butanol,isobutanol,and ethandiol,did not show such phenomenon. However,interfacial turbulence was observed in the evaporation processes of benzene and toluene mixture and ethandiol-ethnoic acid-ethyl acetate equilibrium mixture.It is reasonable to believe that under suitable operating conditions,interfacial turbulence may affect distillation processes.