Abstract— <p>The work is aimed at intensifying the rectification process using the example of studying a binary mixture of ethanol–water and a multicomponent medium (alcohol condensate). The results of experimental studies of rectification during condensation of vapors on the surface of a plate, as well as on horizontally and vertically installed pipes, are presented. It is shown that the efficiency of enrichment and separation of the steam mixture depends on the ratio of liquid and vapor flows, the specific heat flux, the temperature of the heat-transfer surface, and the method of forming the condensate film. The value of the temperature difference between the coolant supplied to the heat-exchange surface and the condensing vapors is established, as well as the specific heat flow released by the condensing vapors, at which the greatest enrichment is achieved. The process of heat removal is carried out by boiling a flowing film of water over a heat-transfer surface, ensuring a relatively low temperature difference during rectification, and the heat transfer coefficients are calculated. The results of separation of a multicomponent medium during partial condensation are obtained and the factors influencing the separation efficiency are established. Based on the research results, a packed column dephlegmator is tested, which makes it possible to obtain rectified alcohol with ethanol losses of less than 1% by weight.</p>