FIELD: carrying out of chemical reactions or heating of thermolabile liquids in thin film. SUBSTANCE: operational liquid flows down as film on vertical or inclined surfaces of walls under action of gas flow. Between wall surface and operational liquid film flowing down film of mutually insoluble liquid, thickness of which is adjusted by its consumption, that causes increase of movement speed of all layers of operational liquid film. Optimal profile of speed depending on thickness of operational liquid film is created due to meeting flow of gas. EFFECT: improved process. 2 cl, 2 dwg 1 tbl
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