Abstract: Disclosure is made of a counter-current gas-liquid contact apparatus whose shell provided with gas and liquid admission and discharge branch pipes accommodates reflux plates arranged one above another with gaps in between; said reflux plates are made in the form of trays open at the top and assembled into packs; said trays have counter-opposed inclined rims and are arranged on a descending spiral so that there remain passages in the shell between the tray rims and the shell walls for the vertical flow of gas; said passages accommodate horizontal guide baffles which partition completely said passages and deflect the gas flow from one passage into another through the gaps between the trays in the direction from one inclined rim to the other.

Abstract: A rotary film apparatus comprising a vertical body housed in a jacket and having a heat-exchanging surface formed, according to the invention, by series-connected and oppositely directed conjugated truncated cones, the bases of said cones being made rounded.

Abstract: The film-type rotary mass-and-heat exchange column comprises a shell which accommodates a vertical shaft carrying the contact stages held in position thereto. The contact stages are formed by the bands curved into the spirals diverging from the shaft and flanged towards the latter at their edges. The bands are provided with longitudinal beads bulging outwards on the concave surface of the bands so as to establish a number of channels adjacent for height.